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Learn how you can use the Virtualization framework to quickly create virtual machines on your Mac. We’ll show you how to create a virtual Mac and quickly test changes to your app in an isolated environment. We’ll also explore how you can install and run full Linux distributions on Apple silicon, and share how you can take advantage of Rosetta 2 to run x86-64 Linux binaries.

WeatherKit offers valuable weather data for your apps and services to help people stay up to date on the latest conditions.

Bring the latest HealthKit features to your health & fitness app. We’ll show you how to capture more detailed sleep data through sleep stages, track swim-bike-run and interval workouts with the enhanced Workout API, and save vision prescriptions — including an image of the physical prescription — directly to HealthKit while preserving privacy.

Discover how the Nearby Interaction framework can help you easily integrate Ultra Wideband (UWB) into your apps and hardware accessories. Learn how you can combine the visual-spatial power of ARKit with the radio sensitivity of the U1 chip to locate nearby stationary objects with precision. We’ll also show you how you can create background interactions using UWB accessories paired via Bluetooth.

CarPlay is a smarter, safer way to use your iPhone while you drive. Learn about the latest app types for CarPlay and discover how the CarPlay Simulator can help you develop and test apps without leaving your desk. We’ll also explore how navigation apps can connect with digital instrument clusters in supported vehicles.

Discover the latest updates to Wallet & Apple Pay. We’ll show you how to support Orders in Wallet for your apps and websites and securely validate someone’s age and identity with the Identity Verification API. We’ll also explore PassKit support for SwiftUI, and discuss how you how you can improve your Apple Pay experience with Automatic Payments.

Explore the latest features in Safari and WebKit and learn how you can make better and more powerful websites. We’ll take you on a tour through the latest updates to HTML, CSS enhancements, Web Inspector tooling, Web APIs, and more.

Explore the latest updates to WKWebView, our framework for incorporating web content into your app’s interface. We’ll show you how to use the JavaScript fullscreen API, explore CSS viewport units, and learn more about find interactions. We’ll also take you through refinements to content blocking controls, embedding encrypted media, and using the Web Inspector.

Our widgets code-along returns as we adventure onto the watchOS and iOS Lock Screen. Learn about the latest improvements to WidgetKit that help power complex complications on watchOS and can help you create Lock Screen widgets for iPhone. We’ll show you how to incorporate the latest SwiftUI views to provide great glanceable data, explore how each platform renders content, and learn how you can customize the design and feel of your content within a widget or complication.

It’s a SwiftUI party — and you’re invited! Join us as we share the latest updates and a glimpse into the future of UI framework design. Discover deep levels of customization, advanced techniques for layout, elegant strategies for sharing, and rock-solid structural approaches for designing an app top-to-bottom in SwiftUI. We’ll also have some celebratory fun as we play with the latest graphical effects and explore APIs.

The recipe for a great app begins with a clear and robust navigation structure. Join the SwiftUI team in our proverbial coding kitchen and learn how you can cook up a great experience for your app. We’ll introduce you to SwiftUI’s navigation stack and split view features, show you how you can link to specific areas of your app, and explore how you can quickly and easily restore navigational state.

SwiftUI now offers powerful tools to level up your layouts and arrange views for your app’s interface. We’ll introduce you to the Grid container, which helps you create highly customizable, two-dimensional layouts, and show you how you can use the Layout protocol to build your own containers with completely custom behavior. We’ll also explore how you can create seamless animated transitions between your layout types, and share tips and best practices for creating great interfaces.

Explore progressive disclosure — one of SwiftUI’s core principles — and learn how it influences the design of our APIs. We’ll show you how we use progressive disclosure, discuss how it can support quick iteration and exploration, and help you take advantage of it in your own code.

Meet Transferable: a model-layer protocol that allows for effortless support for sharing, drag and drop, copy/paste, and other features in your app.

Discover how you can create iPad apps that take advantage of desktop class features. Join Mohammed from the UIKit team as we explore the latest navigation, collection view, menu, and editing APIs and learn best practices for building powerful iPad apps. Code along with this session in real time or download our sample app to use as a reference for updating your own code.

Explore the latest updates to App Clips! Discover how we’ve made your App Clip even easier to build with improvements to the size limit as well as CloudKit and keychain usage. We’ll also show you how to use our validation tool to verify your App Clip and automate workflows for your advanced App Clip experiences using App Store Connect.

Learn how you can use the latest improvements to Safari Web Extensions to create even better experiences for people browsing the web. We’ll show you how to upgrade to manifest version 3, adopt the latest APIs for Web Extensions, and sync extensions across devices.

The Apple Worldwide Developers Conference kicks off with exciting reveals, inspiration, and new opportunities. Join the worldwide developer community for an in-depth look at the future of Apple platforms, directly from Apple Park.

Discover how you can customize app behaviors based on someone’s currently enabled Focus. We’ll show you how to use App Intents to define your app’s Focus filters, act on changes from the system, and present your app’s views in different ways. We’ll also explore how you can filter notifications and update badge counts.

Explore how you can use Variable Color to make SF Symbols even more expressive. We’ll show you how system-provided symbols use variable color and provide best practices and guidance for using it effectively. We’ll also help you learn how to incorporate variable color into custom symbols using the SF Symbols app and its annotation tools.

Learn how you can surface great features from your app directly in Siri, Spotlight, and the Shortcuts app. We’ll introduce you to App Shortcuts, provide best practices to help you evaluate features in your app that would work well as App Shortcuts, and take you through the process of creating one of your own. Learn how to create clear and memorable names, design custom visuals, collect required information, and create discoverable shortcuts

Take a deeper dive into the latest tools, technologies, and advances across Apple platforms to help you create even better apps.

Meet Developer Mode — required on iOS 16, iPadOS 16, and watchOS 9 to install, run, and debug your apps during development. We’ll show you how you to opt in to Developer Mode on your devices, and how to enable Developer Mode in your automation workflows.

Learn how you can optimize your app with the Swift Concurrency template in Instruments. We’ll discuss common performance issues and show you how to use Instruments to find and resolve these problems. Learn how you can keep your UI responsive, maximize parallel performance, and analyze Swift concurrency activity within your app.

Join us as we explore one of the core concepts in Swift concurrency: isolation of tasks and actors. We’ll take you through Swift’s approach to eliminating data races and its effect on app architecture. We’ll also discuss the importance of atomicity in your code, share the nuances of Sendable checking to maintain isolation, and revisit assumptions about ordering work in a concurrent system.

Generics are a fundamental tool for writing abstract code in Swift. Learn how you can identify opportunities for abstraction as your code evolves, evaluate strategies for writing one piece of code with many behaviors, and discover language features in Swift 5.7 that can help you make generic code easier to write and understand.

Learn how you can use Swift 5.7 to design advanced abstractions using protocols. We’ll show you how to use existential types, explore how you can separate implementation from interface with opaque result types, and share the same-type requirements that can help you identify and guarantee relationships between concrete types.

Join us for an update on Swift. We’ll take you through performance improvements, explore more secure and extensible Swift packages, and share advancements in Swift concurrency. We’ll also introduce you to Swift Regex, better generics, and other tools built into the language to help you write more flexible & expressive code.

Discover the latest open source Swift package from Apple: Swift Async Algorithms. We’ll explore algorithms from this package that you can use with AsyncSequence, including zip, merge, and throttle. Follow along with us as we use these algorithms to build a great messaging app. We’ll also share best practices for combining multiple AsyncSequences and using the Swift Clock type to work with values over time.

Discover distributed actors — an extension of Swift’s actor model that simplifies development of distributed systems. We’ll explore how distributed actor isolation and location transparency can help you avoid the accidental complexity of networking, serialization, and other transport concerns when working with distributed apps and systems.

Learn how you can process strings more effectively when you take advantage of Swift Regex. Come for concise literals but stay for Regex builders — a new, declarative approach to string processing. We’ll also explore the Unicode models in String and share how Swift Regex can make Unicode-correct processing easy.

Go beyond the basics of string processing with Swift Regex. We’ll share an overview of Regex and how it works, explore Foundation’s rich data parsers and discover how to integrate your own, and delve into captures. We’ll also provide best practices for matching strings and wielding Regex-powered algorithms with ease.

Discover how you can create, build, and deploy a Swift server app alongside your pre-existing Xcode projects within the same workspace. We’ll show you how to create your own local app and test endpoints using Xcode, and explore how you can structure and share code between server and client apps to ease your development process

Discover how to improve your app’s build and runtime linking performance. We’ll take you behind the scenes to learn more about linking, your options, and the latest updates that improve the link performance of your app.

Learn how we’ve optimized the Swift and Objective-C runtimes to help you make your app smaller, quicker, and launch faster. Discover how you can get access to efficient protocol checks, smaller message send calls, and optimized ARC simply when you build your app with Xcode 14 and update your deployment target.

Learn how the Xcode build system extracts maximum parallelism from your builds. We’ll explore how you can structure your project to improve build efficiency, take you through the process for resolving relationships between targets’ build phases in Xcode, and share how you can take full advantage of available hardware resources when compiling in Swift. We’ll also introduce you to Build Timeline — a powerful tool to help you monitor your build efficiency and performance.

Explore the navigation experience for Swift-DocC on the web. We’ll show you how you can organize and optimize your content to help guide developers through documentation about your frameworks and applications. We’ll also share enhanced techniques to help readers browse your documentation with ease.

Learn how you can set up complex Swift projects for debugging. We’ll take you on a deep dive into the internals of LLDB and debug info. We’ll also share best practices for complex scenarios such as debugging code built on build servers or code from custom build systems.

Learn how you can build apps for multiple Apple platforms using Xcode 14. We’ll show you how to streamline app targets, maintain a common codebase, and share settings by default. We’ll also explore how you can customize your app for each platform through conditionalizing your settings and code.

Discover how you can easily connect Thunderbolt and USB accessories to iPad with DriverKit. We’ll show you how to convert your existing Mac drivers without any code changes, learn how to add real-time audio support with AudioDriverKit, and provide best practices and tips for developing drivers for iPad.

Discover how you can use the Background Assets framework to download large files directly from your CDN and improve the initial launch experience of your apps and games. We’ll show you how to schedule background downloads during initial app install, app updates, and periodically as someone uses the app. We’ll also explore how you can manage scheduled downloads to make sure people have the content they want, when they want it.

watchOS 8 brings all-new opportunities to keep people up to date on their watch face. With new APIs for the Always-On Retina display and updating complications from Bluetooth devices and background delivery of HealthKit data, it’s never been easier to keep your app up to date. Learn about region-based user notifications to leverage location in your app. Explore all the new enhancements to SwiftUI and watchOS that will get you excited to build your next Watch app.

Advances in Apple Watch give you more ways to communicate to and from your app, and new audiences to consider. Learn what strategies are available for data communication and how to choose the right tool for the job. Compare and contrast the benefits of using technologies such as iCloud Keychain, Watch Connectivity, Core Data, and more.

Discover how you can integrate data from Bluetooth accessories into Apple Watch apps and complications. Bluetooth devices can provide medical data, sports stats, and more to Apple Watch, and help people get more out of your software in the process. We’ll show you how to connect to these devices during Background App Refresh to display the most up-to-date information in your Apple Watch complications, provide an overview of Core Bluetooth on watchOS, and explore best practices for Bluetooth accessory design.

Discover how App Clips can elevate quick and focused experiences for specific tasks, the moment your customer needs them. We’ll take you through some of the latest improvements to App Clips, including launching an experience directly from an app, testing your App Clip locally, and creating App Clip Codes to make it easy to access your experience in the real world. We’ll also share some great examples of App Clips from our developer community that provide innovative ways to interact with people and beautiful designs.

App Clips give people the power to discover and download a small part of your app at a moment’s notice to complete tasks and transactions. Explore tips and best practices to help you create compact App Clips that emphasize modern features and elegant design. Learn how you can build reliable and secure App Clips to ensure that people can always access your experience when scanning a physical App Clip Code or viewing it through your website. And we’ll take you through specific strategies for testing an App Clip before releasing it to the world.

There’s never been a better time to develop your apps with SwiftUI. Discover the latest updates to the UI framework — including lists, buttons, and text fields — and learn how these features can help you more fully adopt SwiftUI in your app. Find out how to create beautiful, visually-rich graphics using the canvas view, materials, and enhancements to symbols. Explore multi-column tables on macOS, refinements to focus and keyboard interaction, and the multi-platform search API. And we’ll show you how to take advantage of features like Swift concurrency, a brand new AttributedString, format styles, localization, and so much more.

Discover how you can use Swift’s concurrency features to build even better SwiftUI apps. We’ll show you how concurrent workflows interact with your ObservableObjects, and explore how you can use them directly in your SwiftUI views and models. Find out how to use await to make your app run smoothly on the SwiftUI runloop, and learn how to fetch remote images quickly with the AsyncImage API. And we’ll take you through the process of enabling additional asynchronous flows in your custom views.

Learn how you can bring your graphics to life with SwiftUI. We’ll begin by working with safe areas, including the keyboard safe area, and learn how to design beautiful, edge-to-edge graphics that won’t underlap the on-screen keyboard. We’ll also explore the materials and vibrancy you can use in SwiftUI to create easily customizable backgrounds and controls, and go over graphics APIs like drawingGroup and the all new canvas. With these tools, it’s simpler than ever to design fully interactive and interruptible animations and graphics in SwiftUI.

Peek behind the curtain into the core tenets of SwiftUI philosophy: Identity, Lifetime, and Dependencies. Find out about common patterns, learn the principles that drive the framework, and discover how you can use them to guarantee correctness and performance for your app.

With device input — as with all things in life — where you put focus matters. Discover how you can move focus in your app with SwiftUI, programmatically dismiss the keyboard, and build large navigation targets from small views. Together, these APIs can help you simplify your app’s interface and make it more powerful for people to find what they need.

Learn how you can extend Safari’s functionality with Safari Web Extensions. We’ll introduce you to the latest WebExtension APIs, explore non-persistent background page support — a particularly relevant topic if you’re developing for iOS — and discover how you can use the Declarative Net Request WebExtensions API to block content on the web. Finally, we’ll show you how to customize tabs in Safari 15.

Meet Safari 15: redesigned and ready to help people explore the web. Discover how you can approach designing websites and apps for Safari, and learn how to incorporate the tab bar in your designs. We’ll also take you through features like Live Text and accessibility best practices, explore the latest updates to CSS and Form Controls, and learn how to use the aspect-ratio property in CSS to create incredible websites.

Develop in JavaScript, WebGL, or WebAssembly? Learn how the latest updates to Safari and WebKit — including language changes to class syntax — can help simplify your development process, enhance performance, and improve security. We’ll explore several web APIs that can help provide better interoperability and bring new capabilities to your web content.

Web Inspector provides the tools for you to understand and debug your web pages on macOS, iOS, and iPadOS. We’ll take you through the latest features and improvements to Web Inspector, including a new overlay for inspecting CSS Grid containers on your pages, even more configurable breakpoints to make debugging simpler, and the ability to create and edit Audits.

Explore the latest updates to WKWebView. We’ll show you how to use APIs to manipulate web content without JavaScript, explore delegates that can help with WebRTC and Downloads, and share how you can easily create a richer web experience within your app.

Explore the foundations of great widgets by keeping them relevant and customizable. Learn how to keep widgets up to date with timeline entries and TimelineReloadPolicies. Discover how to adapt your widget to different presentation environments and physical location. And lastly, find out how to create customizable widgets that someone can personalize to their liking.

Make even better iPad apps: Learn how you can adopt prominent scenes for uninterrupted, focused interactions. Help people stay engaged and fast with keyboard shortcuts and the keyboard shortcut interface. Explore how the latest in pointer enhancements can help your app boost productivity.

Iterating over a sequence of values over time is now as easy as writing a “for” loop. Find out how the new AsyncSequence protocol enables a natural, simple syntax for iterating over anything from notifications to bytes being streamed from a server. We’ll also show you how to adapt existing code to provide asynchronous sequences of your own.

Code along with us as we use SwiftUI to build a Mac app from start to finish. Discover four principles all great Mac apps have in common, and learn how to apply those principles in practice using SwiftUI. We’ll show you how to create a powerful, flexible sidebar experience and transform lists to tables within a detail view, then discuss best best practices for data organization. Next, we’ll explore the simple .searchable modifier and find out how to add support for the toolbar and search. And to close out part one, we’ll learn how to build a great multiple-window experience and provide menu bar support.

Discover how you can create a layered and customized sheet experience in UIKit. We’ll explore how you can build a non-modal experience in your app to allow interaction with content both in a sheet and behind the sheet at the same time. We’ll also take you through sheet size customization, revealing or hiding grabber controls, and adapting between popovers and customized sheets in your app.

Discover how to create digital car keys that support Ultra Wideband (UWB), allowing people to unlock and start their car while leaving iPhone in their bag or pocket or Apple Watch on their wrist. We’ll show you how to integrate UWB, add proximity actions and distance unlock features, and help people personalize their vehicle settings by identifying which key someone uses on the driver-side door.

Learn more about the evolution of notifications on Apple platforms. We’ll explore how you can help people manage notifications within your app, including how you can craft meaningful moments with interruption levels and Time Sensitive notifications. And we’ll introduce you to communication notifications, providing a richer experience for calls and messages in your app through SiriKit.

Discover the redesigned Apple Pay for in-app and web payments and learn how you can incorporate the latest APIs into your app or website. Learn how to add features to your app like coupon codes, improved shipping information, and improvements to the payment detail display screen. And explore changes to Wallet passes, including auto-expiry and multi-pass support for the web.

The web is changing, and the next major version of HTTP is here. Learn how HTTP/3 reduces latency and improves reliability for your app and discover how its underlying transport, QUIC, unlocks new innovations in your own custom protocols using new transport functionality and multi-streaming connection groups.

Discover how you can adopt Swift concurrency in URLSession using async/await and AsyncSequence, and how you can apply Swift concurrency concepts to improve your networking code.

iCloud Private Relay is an iCloud+ service that prevents networks and servers from monitoring a person’s activity across the internet. Discover how your app can participate in this transition to a more secure and private internet: We’ll show you how to prepare your apps, servers, and networks to work with iCloud Private Relay.

Explore the latest updates to SF Symbols, Apple’s iconography library. Designed to integrate seamlessly with San Francisco — the system font for Apple platforms — SF Symbols can help you create beautiful and consistent iconography for your app while supporting accessibility features like Dynamic Type and Bold Text. Discover the latest additions to the SF Symbols library, localization enhancements, and how you can more easily customize the color of a symbol to integrate it within your app’s own color palette. We’ll also show you how you can design and annotate custom symbols to support Monochrome, Hierarchical, Palette, and Multicolor rendering modes.

The Apple Worldwide Developers Conference kicks off with exciting reveals, inspiration, and new opportunities. Join the worldwide developer community for an in-depth look at the future of Apple platforms, directly from Apple Park.

Meet CLLocationButton: a secure interface element that provides an easy, low-friction way to grant your app location access only when and where it is needed. Learn how you can add CLLocationButton to new or existing code, how to customize it within interface legibility guidelines, how to recognize and address customization failures, and how it interacts with iOS’s traditional prompt-based Location Services authorization.

5G enables new opportunities for your app or game through better performance for data transfer, higher bandwidth, lower latency, and much more. Discover how you can take advantage of the latest networking technology and Apple hardware to create adaptive experiences for your content that best suit someone’s data connection and optimize network traffic.

Safari Web Extensions use HTML, CSS, and JavaScript to offer people powerful browser customizations — and you can now create them for every device that supports Safari. Learn how to build a Safari Web Extension that works for all devices, and discover how you can convert an existing extension to Safari through Xcode and the Safari Web Extension Converter.

Despite their prevalence, passwords inherently come with challenges that make them poorly suited to securing someone’s online accounts. Learn more about the challenges passwords pose to modern security and how to move beyond them. Explore the next frontier in account security with secure-by-design, public-key-based credentials that use the Web Authentication standard. Discover in this technology preview how Apple is approaching this standard in iOS 15 and macOS Monterey.

Discover how the latest updates to Foundation can help you improve your app’s localization and internationalization support. Find out about the new AttributedString, designed specifically for Swift, and learn how you can use Markdown to apply style to your localized strings. Explore the grammar agreement engine, which automatically fixes up localized strings so they match grammatical gender and pluralization. And we’ll take you through improvements to date and number formatting that simplify complex requirements while also improving performance.

StoreKit 2 delivers powerful, Swift-native APIs for in-app purchases and auto-renewable subscriptions. Learn how you can easily implement in-app purchases and subscriptions, and discover APIs for retrieving product information, handling transactions, determining product entitlements and customer status, as well as comprehensive testing support in Xcode.

Discover how you can create interactive, memorable experiences to onboard people into your app. We’ll take you through discoverable design practices and learn how you can craft explorable, fun interfaces that help people grasp the possibilities of your app at a glance. We’ll also show you how to apply this methodology to personalize your content and make your app easy to customize.

Swift now supports asynchronous functions — a pattern commonly known as async/await. Discover how the new syntax can make your code easier to read and understand. Learn what happens when a function suspends, and find out how to adapt existing completion handlers to asynchronous functions.

Data races occur when two separate threads concurrently access the same mutable state. They are trivial to construct, but are notoriously hard to debug.

When you have code that needs to run at the same time as other code, it’s important to choose the right tool for the job. We’ll take you through the different kinds of concurrent tasks you can create in Swift, show you how to create groups of tasks, and find out how to cancel tasks in progress. We’ll also provide guidance on when you may want to use unstructured tasks.

Discover how your app can interact with Ultra Wideband (UWB) third-party accessories when running on a U1-equipped device. We’ll show you how to use the Nearby Interaction framework’s standards-based technology to implement precise and directionally-aware experiences with accessories. Learn about resources for getting started with accessory and app development such as development kits, sample code, and specification documents, along with supported technology providers.

Discover how you can use DocC to build and share documentation for Swift packages and frameworks. We’ll show you how to begin generating documentation from your own code — or from third-party code you depend upon — and write and format it using Markdown. And we’ll also take you through the export process, helping you generate DocC archives to share with the public.

Great documentation can help people effectively and easily adopt your Swift framework. Discover how you can create rich, conceptual articles to accompany your API. You’ll learn best practices for writing articles, including how to structure your documentation, and find out how to create automatically managed links that connect your docs together.

Meet MailKit: the best way to build amazing experiences on top of Mail. MailKit enables apps to easily and securely interact with the Mail app for macOS. We’ll deep dive into the MailKit API, and show you how to create extensions for composing messages, message actions, secure email, and content blocking.

Discover how you can help people quickly find specific content within your apps. Learn how to use SwiftUI’s .searchable modifier in conjunction with other views to best incorporate search for your app. And we’ll show you how to elevate your implementation by providing search suggestions to help people understand the types of searches they can perform.

Performance optimization can seem like a daunting task — with many metrics to track and tools to use. Fear not: Our survival guide to app performance is here to help you understand tooling, metrics, and paradigms that can help smooth your development process and contribute to a great experience for people using your app.

Discover Swift concurrency in action: Follow along as we update an existing sample app. Get real-world experience with async/await, actors, and continuations. We’ll also explore techniques for migrating existing code to Swift concurrency over time.

Take a deeper dive into the new tools, technologies, and advances across Apple platforms that will help you create even better apps.

Breakpoints can help you debug issues by allowing you to pause and inspect problems in the middle of a process. Discover the latest improvements to breakpoints in Xcode including column and unresolved breakpoints. We’ll also go over best practices for general breakpoints and LLDB tips and tricks.

Working with more complex Xcode projects? You’ve come to the right place. Discover how you can configure your project to build for multiple Apple platforms, filter content per-platform, create custom build rules and file dependencies, and more. We’ll take you through multi-platform framework targets, detail how to optimize your project and scheme configuration, and show you how to make effective use of configuration settings files.

Discover how you can achieve maximum performance and insightful debugging with your app. Symbolication is at the center of tools such as Instruments and LLDB to help bridge the layers between your application’s runtime and your source code. Learn how this process works and the steps you can take to gain the most insight into your app.

Learn about the basics of object lifetimes and ARC in Swift. Dive deep into what language features make object lifetimes observable, consequences of relying on observed object lifetimes and some safe techniques to fix them.

Learn how to localize your SwiftUI app and make it available to a global audience. Explore how you can localize strings in SwiftUI, including those with styles and formatting. We’ll demonstrate how you can save time by having SwiftUI automatically handle tasks such as layout and keyboard shortcuts, and take you through the localization workflow in Xcode 13.

When you localize the text within your app, you can help make your app more accessible to a worldwide audience. Discover best practices for building your localization workflow, including how to write and format strings accurately, and learn how to prepare strings for localization in different languages using Xcode.

Discover how you can build a top-notch accessibility experience for watchOS when you support features like larger text sizes, VoiceOver, and AssistiveTouch. We’ll take you through adding visual and motor accessibility support to a SwiftUI app built for watchOS, including best practices around API integration, experience, and more.

Discover how you can make key parts of your app available for someone at exactly the right moment — without them ever needing to open it. Learn how to craft and donate intents to the system, helping you surface relevant and contextual information about your app in Siri, Focus, Shortcuts, the Smart Stack, and more. We’ll explore how the system intelligently identifies information and show you techniques for structuring intents to help increase engagement and visibility for your app.

Discover how you can author immersive tutorials from scratch with DocC. We’ll demonstrate how you can bring together rich instructions, example code, and images through the DocC syntax to showcase your Swift framework in action. And we’ll go over how to create progressive training that can provide interactive learning opportunities and help people better understand use cases for your framework.

Find out how you can easily host your Swift package and framework DocC documentation online. We’ll take you through configuring your web server to host your generated DocC archives, and help you learn to use the xcodebuild tool to automate documentation generation and keep your web content synchronized and up to date.

Discover the principles for creating intuitive physical interactions between two or more devices, as demonstrated by Apple designers who worked on features for iPhone, HomePod mini, and AirTag. Explore how you can apply these patterns to your own app when designing features for Apple platforms, and help people using your app interact more directly with their surroundings.

Build consistently smooth scrolling list and collection views: Explore the lifecycle of a cell and learn how to apply that knowledge to eliminate rough scrolling and missed frames. We’ll also show you how to improve your overall scrolling experience and avoid costly hitches, with optimized image loading and automatic cell prefetching.

Some problems are easier to solve by creating a customized programming language, or “domain-specific language.” While creating a DSL traditionally requires writing your own compiler, you can instead use result builders with Swift 5.4 to make your code both easier to read and maintain. We’ll take you through best practices for designing a custom language for Swift: Learn about result builders and trailing closure arguments, explore modifier-style methods and why they work well, and discover how you can extend Swift’s normal language rules to turn Swift into a DSL.

Dive into the details of Swift concurrency and discover how Swift provides greater safety from data races and thread explosion while simultaneously improving performance. We’ll explore how Swift tasks differ from Grand Central Dispatch, how the new cooperative threading model works, and how to ensure the best performance for your apps.

Discover two of the latest additions to the list of open-source Swift packages from Apple: Swift Algorithms and Swift Collections. Not only can you use these packages immediately, they also incubate new algorithms and data structures for eventual inclusion in the Swift Standard Library. We’ll show you how you can integrate these packages into your projects and select the right algorithms and data structures to make your code clearer and faster.

Discover how you can track down hangs and delays in your app. We’ll show you tools and methods to discover hangs and their causes, learn about anti-patterns that can lead to hangs, explore best practices for eliminating hangs like GCD, and provide guidance on when you should consider asynchronous code to improve your app performance.

Learn how you can link your app to Quick Note and help people quickly connect your content to their notes — and their notes to your content. Discover how Quick Note recognizes and links to app content through NSUserActivity, and find out how you can adopt this API in your app. We’ll take you through the requirements, benefits, and features of supporting Quick Note. We’ll also provide guidance and best practices for NSUserActivity to help your app get all of its benefits.

Tour the latest updates to the SF Symbols app — our interactive library for iconography. Learn how you can use the library to design accessible and inclusive apps that look incredible: We’ll take you through changes to the app and symbols search, explore previewing and custom symbol management, and help you integrate symbols into your interface designs. It’s recommended you watch “What’s new in SF Symbols” from WWDC21 before watching this video.

Join us for part two of our Code-Along series as we use SwiftUI to build a Mac app from start to finish. The journey continues as we explore how our sample gardening app can adapt to a person’s preferences and specific workflows. Learn how SwiftUI apps can automatically react to system settings, and discover how you can use that information to add more personality to an app. We’ll show you how you can give people the flexibility to customize an app through Settings, and explore how to use different workflows for manipulating someone’s data (like drag and drop). To finish, we’ll show you how you can move data to and from an app, incorporating features like Continuity Camera to provide a simple workflow for importing images.

Test repetitions can help you debug even the most unreliable code. Discover how you can use the maximum repetitions, until failure, and retry on failure testing modes within test plans, Xcode, and xcodebuild to track down bugs and crashers and make your app more stable for everyone.

Discover how Apple creates products that work well for everyone. Learn from a few of the engineers and designers who helped build Apple Watch as they share stories that highlight our approach to accessible design, constant iteration, and community engagement.

Discover how you can incorporate SF Symbols into your SwiftUI app. We’ll explore basic techniques for presenting symbols, customizing their size, and showing different variants. We’ll also take you through the latest updates to symbol colorization and help you pick the right tool for your app’s needs.

Make routine tasks in App Store Connect a thing of the past when you automate your workflow with the App Store Connect API. Learn how you can manage more about your presence on the App Store with the App Metadata API, or use the new Power and Performance Metrics and Diagnostics API to access the same aggregate data that drives the Power and Performance analysis tools in Xcode. Whether you’re managing team members and provisioning profiles, adding or removing beta testers, or downloading your sales and financial reports, this comprehensive API makes automation of these processes a snap.

You can now store car keys on iPhone or Apple Watch. You no longer have to bring your key fob to unlock and start your car. And with digital keys, it’s easy to share them with family or friends, and manage keys remotely.

When you design with accessibility in mind, you empower everyone to use your app. Discover how to create an adaptive interface for your app that takes a thoughtful approach to color, provides readable text, and accommodates other visual settings to maintain a great experience throughout.

Discover new techniques for configuring collection view and table view cells to quickly build dynamic interfaces in your app. Explore configuration types you can use to easily populate cells with content and apply common styles. Take advantage of powerful APIs to customize the appearance of cells for different states. Find out about patterns and best practices that simplify your code, eliminate bugs, and improve performance.

Meet WidgetKit: the best way to bring your app’s most useful information directly to the home screen. We’ll show you what makes a great widget and take a look at WidgetKit’s features and functionality. Learn how to get started creating a widget, and find out how WidgetKit leverages the power of SwiftUI to provide a stateless experience. Discover how to harness your existing proactive technologies to make sure your widget surfaces relevant material. And create a Timeline that ensures your content is always fresh.

Display detailed data in your SwiftUI apps more quickly and efficiently with improved stacks and new list and outline views. Now available on iOS and iPadOS for the first time, outlines are a new multi-platform tool for expressing hierarchical data that work alongside stacks and lists. Learn how to use new and improved tools in SwiftUI to display more content on screen when using table views, create smooth-scrolling and responsive stacks, and build out list views for content that needs more than a vStack can provide. Take your layout options even further with the new grid view, as well as disclosure groups.

Widgets are bite-sized pieces of information from your app that someone can choose to place on their home screen or Today view. Discover the process of building the views for a widget from scratch using SwiftUI. Brush up on the syntax that you’ll need for widget-specific construction and learn how to incorporate those commands and customize your widget’s interface for a great glanceable experience.

Take your app on a most wondrous adventure to the home and Today screens of iPhone, iPad, and Mac. Grab the starter project and code along with us! We will guide you through the process of creating a widget for your app from start to finish so that you can provide people with beautiful views and glanceable information in an easily-accessible place. Discover how to create a widget project, learn fundamental concepts for widgets and their structure, configure the widget and its provider, and start exploring timeline concepts.

Our code-along continues as we help our widget rewrite the future and travel into an alternate timeline. Continue where you left off from Part 1, or traverse time and space and begin with the Part 2 starter project to jump right into the action. Find out how you can integrate system intelligence into your widgets to help them dynamically change at different points during the day and surface the most relevant information. Explore core timeline concepts, support multiple widget families, and learn how to make your widget configurable.

Take your widget to the next level as we embark upon the third and final stage of the widgets code-along. Pick up where you left off in Part 2 or start with the Part 3 starter project to go warp speed ahead. We’ll explore advanced concepts for widgets, timelines, and configuration. Learn how to load in-process and background URLs and link directly to content within your app. And discover how to create multiple widgets that explore different features within your app, as well as making your widget dynamically configurable.

Thanks to the new App protocol, SwiftUI now supports building entire apps! See how Apps, Scenes, and Views fit together. Learn how easy it is to implement the features people expect from a best-in-class product while saving time and reducing complexity. Easily add expected functionality to your interface using the new commands modifier, and explore the ins and outs of the new WindowGroup API.

Data is a complex part of any app, but SwiftUI makes it easy to ensure a smooth, data-driven experience from prototyping to production. Discover @State and @Binding, two powerful tools that can preserve and seamlessly update your Source of Truth. We’ll also show you how ObservableObject lets you connect your views to your data model. Learn about some tricky challenges and cool new ways to solve them — directly from the experts!

SwiftUI can help you build better and more powerful apps for iPhone, iPad, Mac, Apple Watch, and Apple TV. Learn more about the latest refinements to SwiftUI, including interface improvements like outlines, grids, and toolbars. Take advantage of SwiftUI’s enhanced support across Apple frameworks to enable features like Sign In with Apple. Discover new visual effects, as well as new controls and styles. And find out how the new app and scene APIs enable you to create apps entirely in SwiftUI, as well as custom complications and all new widgets.

Add a new dimension to your tvOS app with SwiftUI. We’ll show you how to build layouts powered by SwiftUI and customize your interface with custom buttons, provide more functionality in your app with a context menu, check if views are focused, and manage default focus.

When you add complications to a Watch app, people can access glanceable and up to date information directly from their watch face. We’ll show you how to create and build complications from the ground up and introduce you to Multiple Complications. Learn how to construct timelines, use families and templates, and discover best practices on crafting a thorough complication experience.

Spice up your graphic complications on Apple Watch using SwiftUI. We’ll teach you how to use custom SwiftUI views in complications on watch faces like Meridian and Infograph, look at some best practices when creating your complications, and show you how to preview your work in Xcode 12.

Time is of the essence: Discover how your Apple Watch complications can provide relevant information throughout the day and help people get the information they need, when they need it. Learn best practices for capitalizing on your app’s runtime opportunities, incorporating APIs like background app refresh and URLSession, and implementing well-timed push notifications.

Track your app’s performance metrics in custom team dashboards, bug reporting systems, and other custom workflows with the Power and Performance Metrics and Diagnostics API. Explore how you can access the same data that drives the Power and Performance analysis tools in Xcode to quickly identify trends and regressions. Learn how to leverage diagnostic signatures and logs — including call stack trees — to prioritize and debug issues. And discover how you can integrate this API with your development team’s existing tools to troubleshoot issues quickly, offering better overall performance for people who use your app.

Demystify the art of designing Siri experiences for your music and audio apps: We’ll show you how to think about crafting great interactions and how you can provide custom vocabulary so that Siri can respond with more accuracy and personality. We’ll also explain how you can debug common errors and test your intents using the same methods Apple’s own Siri team employs.

Discover how you can enable Siri summoning for your music or audio app using SiriKit Media Intents. We’ll walk you through how to add Siri support to your music, podcast, or other audio service on more of our platforms, including HomePod and Apple TV, so people can start listening by just asking Siri. And learn about new APIs that let you support alternative results, helping people listen more quickly without leaving the Siri interface.

Get a quick overview of everything new in Siri and Shortcuts to help people get more out of your app: We’ll demonstrate how you can design visually rich conversations, feel at home with the operating system by designing for the new compact Siri UI, and provide an overview of all the ways we’ve made it even easier for people to organize and set up actions from your apps.

Optimize your app for Siri and give people a more natural way to interact with the features of your app. We’ll compare the different Siri technologies and help you identify the right one for you and your needs, show you how to get started with building for conversational interactions, and explore best practices for making your integration truly excel.

When you create an intent for your app, you can help people accomplish tasks quickly by using it as part of a shortcut or when asking Siri. Learn how to adopt Siri more easily than ever when you use SiriKit’s in-app intent handling, and how to improve Siri performance with existing Intents app extensions. We’ll also show you how to leverage features in SiriKit to improve the experience of using your actions — like including images and subtitles for a rich conversational experience. And find out how to fine tune support for intents in your codebase to make your life as a developer easier.

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Discover how you can help people get ready for a good night’s sleep by surfacing your app’s actions for Wind Down Shortcuts, part of the new Sleep experience. Learn more about how Wind Down works. Find out how you can build intents that expose features in your app like guided meditations, soothing audio stories, or many other categories. And explore how you can surface those features on someone’s device before bedtime.

Intelligence is a core part of building a great modern app. App extensions, Siri suggestions, voice, widgets, App Clips — we’ve designed all of these features to help make everyday tasks easier for people who use our platforms. Learn about the origins of the intelligent system experience, and find out how integrating intelligently with the system can help make your app more convenient, relevant, and intuitive, making your features the focus.

The building blocks of the intelligent system are simple: Define, learn, execute. Discover how you can use intents to define your app’s key features, create donations to help the system learn and make predictions about the future, and implement extensibility to ensure your app is ready to execute at just the right moment. Learn from teams at Apple about how their technologies use intents and donations in different ways, all for the same goal: to make the everyday easier.

Learn how extensibility is key to surfacing the most important features of your app into new entry points of the operating system. And discover how — by breaking out of the constraints of a monolithic container — your app can see increased engagement through suggestions on the lock screen, in Calendar, and by enabling voice interactions.

Help people who use iPad with a Magic Keyboard, mouse, trackpad or other input device get the most out of your app. We’ll show you how to add customizations to the pointer on iPad using pointer interaction APIs, create pointer effects for your buttons and custom views, and change the pointer shape in specific areas of your app to highlight them.

Xcode Playgrounds helps developers explore Swift and framework APIs and provides a scratchpad for rapid experimentation. Learn how Xcode Playgrounds utilizes Xcode’s modern build system, provides improved support for resources, and integrates into your projects, frameworks, and Swift packages to improve your documentation and development workflow.

Universal Links help people access your content, whether or not they have your app installed. Get the details on the latest updates for the Universal Links API, including support for Apple Watch and SwiftUI. Learn how you can reduce the size and complexity of your app-site-association file with enhanced pattern matching features like wildcards, substitution variables, and Unicode support. And discover how cached associated domains data will improve the initial launch experience for people using your app.

The Apple Worldwide Developers Conference kicks off with exciting reveals, inspiration, and new opportunities to continue creating the most innovative apps in the world. Join the worldwide developer community for an in-depth look at the future of Apple platforms, directly from Apple Park.

Show off your watchOS app’s complications and create a watch face worth sharing. Learn how to share watch faces inside your watchOS and iOS apps or host them on the web for anyone to find and download. We’ll also explore best practices for using watch face preview images, and show you how to create a smooth installation experience.

Widgets elevate timely information from your app to primary locations on iPhone, iPad and Mac. Discover the keys to designing glanceable widgets, developing a strong widget idea, and clearly communicating with content, color, sizing, layout, and typography.

Learn how to improve iPad apps to leverage the increased screen size and additional features of iPadOS, and help people accomplish more with their devices. Discover how you can build detailed multi-column layouts and integrate lists into your app with little adjustment to your existing code. We’ll also explore reducing modality within your views to make it easier to navigate your interface with fewer taps and touches.

Scribble offers a lightweight, ergonomic, and enjoyable way of entering text on iPad with Apple Pencil. Discover how people can take advantage of Scribble and handwritten text in apps that use standard text input controls or that implement a custom text editing experience. You’ll learn how it integrates into TextKit, and when you’ll need to adopt the new UIScribbleInteraction and UIIndirectScribbleInteraction APIs to provide a delightful and consistent experience with Scribble in your app.

PencilKit helps power creativity, writing, drawing, and animation in your iPad apps. Explore the latest improvements to our drawing and annotation framework, and discover how you can take advantage of APIs like PKToolPicker, PKCanvasView, and PKStroke to support new features in illustration and writing apps.

Apple silicon Macs can run many iPad and iPhone apps as-is, and these apps will be made available to users on the Mac through the Mac App Store. Discover how iPad and iPhone apps run on Apple silicon Macs, and the factors that make your apps come across better. Learn how to test your app for the Mac, and hear about your options for distribution of your apps.

Create App Clips for table reservations, food ordering, and more on behalf of brands, businesses, or services that appear within your app. We’ll show you how you can deliver customized experiences for each business, offering them a unique look, invocation card, and icon — all within a single App Clips binary. Learn best practices for uploading unique metadata, handling links, routing notifications, and keeping track of session states. And discover different types of icons in the context of App Clips, where they appear, and how to customize them.

Explore the world of declarative-style programming: Discover how to build a fully-functioning SwiftUI app from scratch as we explain the benefits of writing declarative code and how SwiftUI and Xcode can combine forces to help you build great apps, faster.

App Clips are best when they provide an “in the moment” experience for people using them, like ordering your favorite refreshing beverage or paying for parking. We’ll share guidelines and best practices for building focused and consistent App Clips, show you how to streamline transaction experiences by taking advantage of technologies like App Clip notifications and location confirmation, and explore how you can help people move from your App Clip over to your full app.

With AppleSeed for IT, you can help your school or business test pre-release versions of Apple software and provide valuable feedback directly to Apple. We’ll guide you through getting started in AppleSeed for IT and provide insight on how to file great feedback collaboratively within your organization using the new Teams feature in Feedback Assistant. You’ll also learn more about Managed Software Updates in macOS Big Sur, including how to delay major updates or security and system files for employees’ machines while you certify the release on their systems.

Develop location-aware enterprise apps for your business and personalize your employee’s everyday experience. Learn how Apple built the Caffe Macs app for its on-campus cafeterias using iBeacons and Location Services and how you can apply these tools and frameworks to your own apps, while preserving employee privacy. From there, discover how you can use localization to deliver a great experience for your international employees.

Learn how to build focused enterprise apps that work well together. In this session, we’ll introduce you to Apple Retail’s suite of enterprise apps, which help employees interact with customers, track operations, manage stores, and stay connected. Discover how Apple Retail created a unified set of apps by adopting Swift Packages and testing for app scalability. And explore how managing apps in production with configurations can help tailor app suites to different regions and locations.

App Clips are small parts of an app that offer a streamlined, direct experience and help people get what they need at the right time. Learn how you can invoke an App Clip through real-world experiences like App Clip Codes, NFC, and QR codes, or have them appear digitally through apps like Maps or Safari. We’ll show you how to handle links in your App Clip and demonstrate how to set up your associated domains. And discover how you can configure App Clip experiences in App Store Connect, add App Clip banners to your website, and thoroughly test your App Clips through TestFlight.

Discover how you can add third-party frameworks to your app and keep them up to date using Swift packages in Xcode. We’ll show you how to author packages that reference frameworks, explain binary targets and how to specify them in your package manifest file, and demonstrate how to compute checksums so that your clients always get the exact binary you expect.

Make Apple Pencil an even more useful tool for drawing and writing within your app. With PencilKit, you can delve into the strokes, inks, paths, and points that comprise a drawing, use these to build features that use recognition, and modify drawings in response to input. Discover how you can dynamically generate shapes and drawings and learn more about APIs like PKDrawings and PKStrokes.

When you use SwiftUI previews during development, you can quickly create apps that are more flexible and maintainable. Discover ways to improve the preview experience by making small tweaks to your project. Find out how to preview multiple files at once, how to manage data flow for previews, and how to use sample data while previewing. We’ll also give you strategies for defining view inputs to make them more previewable and testable.

Build feature-rich research and care apps with CareKit: Learn about the latest advancements to our health framework, including new views for its modular architecture, improvements to the data store, and tighter integration with other frameworks on iOS. And discover how the open-source community continues to leverage CareKit to allow developers to push the boundaries of digital health — all while preserving privacy.

Dive into the microscopic world of low-level bits and bytes that underlie every Objective-C and Swift class. Find out how recent changes to internal data structures, method lists, and tagged pointers provide better performance and lower memory usage. We’ll demonstrate how to recognize and fix crashes in code that depend on internal details, and show you how to keep your code unaffected by changes to the runtime.

Bring your resources along for the ride when you organize and share code using Swift packages. Discover how to include assets like images and storyboards in a package and how to access them from code. And learn how to add localized strings to make your code accessible to people around the world.

Great watchOS apps are simple and direct. Actions should be discoverable, predictable and relevant. This session covers effective strategies for displaying actions in your watchOS app, whether they are primary buttons that begin core tasks, or contextual actions that might be less commonly used but are still important to offer.

App Clips offer fast, convenient ways for people to perform everyday tasks without needing to download or navigate your full app. We’ll show you how to identify key elements from your iOS app that make up a great App Clip, design a smooth flow, work with notifications, and provide messaging guidance when encouraging people to download your full app.

HealthKit is an essential framework that integrates first- and third-party health and fitness data to help people manage their personal health information. Learn about HealthKit’s latest updates, which provide read access to electrocardiograms on Apple Watch and log and track over a dozen new symptoms and their severity. We’ll also go through the latest mobility data types like walking speed and step length to help people monitor and understand their mobility over time.

WKWebView is the best way to present rich, interactive web content right within your app. Explore new APIs that help you convert apps using WebViews or UIWebViews while adding entirely new capabilities. Learn about better ways to handle JavaScript, fine tune the rendering process, export web content, and more.

Shortcuts are a natural fit on Apple Watch, allowing people to get things done with just a tap — even from a complication. Bring your app’s intents to the wrist: We’ll help you optimize your shortcuts performance, understand how intents can be routed from watchOS to iOS, explore the latest interaction and presentation interfaces, and examine how the Shortcuts app manages shortcuts and intents for Apple Watch.

Widgets are at their best when they show up on someone’s Home screen or in the Today View at the right time and provide actionable, relevant information. We’ll show you how to build configurable widgets to let people create a personalized Home screen experience, and that take advantage of system intelligence to help people get what they want, when they want it. Learn how to customize your widget’s configuration interface, and how to appear within Siri Suggestions or at the top of a widget Smart Stack based on user behavior or by letting the system know when there’s new, timely information.

Whether you’re hosting event information in your app, on the web, or in an email, Siri Event Suggestions can help people keep track of their commitments — without compromising their privacy. We’ll show you how to set up your reservations so that they automatically show up in the Calendar app and how to work with the Siri Event Suggestions APIs for iOS and Markup for web and email.

Join the worldwide developer community for an in-depth look at the future of Apple platforms, directly from Apple Park.

Understand what motivates people to use your app — and how you can use system intelligence to help them and achieve your own goals as a developer. We’ll take a look at a typical person’s journey to better understand how an app can become a key part of their routine — and why some apps just don’t stick. Learn how you can provide the right kind of value at the right time to help them in their everyday tasks, and how your app and the system can evolve alongside them.

SF Symbols make it easy to adopt high-quality, Apple-designed symbols created to look great with San Francisco, the system font for all Apple platforms. Discover how you can use SF Symbols in AppKit, UIKit, and SwiftUI. Learn how to work with SF Symbols in common design tools and how to use them in code. And we’ll walk you through the latest updates, including additions to the repertoire, alignment improvements, changes with right-to-left localization, and multicolor symbols.

Your porting questions, answered: Learn how to recompile your macOS app for Apple silicon Macs and build universal apps that launch faster, have better performance, and support the future of the platform. We’ll show you how Xcode makes it simple to build a universal macOS binary and go through running, debugging, and testing your app. Learn what changes to low-level code you might need to make, find out how to handle in-process and out-of-process plug-ins, and discover some useful tips for working with universal apps.

ResearchKit continues to simplify how developers build research and care apps. Explore how the latest ResearchKit updates expand the boundaries of data researchers can collect. Learn about features like enhanced onboarding, extended options for surveys, and new active tasks. Discover how Apple has partnered with the research community to leverage this framework, helping developers build game-changing apps that empower care teams and the research community.

Localizing your app is a wonderful way to share your work with a worldwide audience and make it relevant to more cultures and languages. We’ll show you how you can prepare for localization before ever translating a word by building thoughtful layouts for your app. Learn how to structure your UI in Xcode, identify common issues prevalent with more verbose and right-to-left languages, and easily adapt your interfaces to provide a great experience for everyone.

Learn how to anticipate potential interruptions to your app’s interface and build smart tests to identify them. UI interruptions often appear indeterminately, typically during onboarding or first launch, which can make them hard to track down. Learn how to understand interruptions, write stronger tests with UI interruption handlers, and manage expected alerts.

iOS and iPadOS provide powerful capabilities to help developers deliver breakthrough apps and games across all device generations. In certain instances, however, demanding apps with exceptional performance requirements may only be able to provide the best experience on devices with an A12 Bionic chip or higher.

Bring the power of the pointer to your iPad app: We’ll show you how Apple’s design team approached designing the iPadOS pointer to complement touch input, and how you can customize and refine pointer interactions in your app to make workflows more efficient and gratifying. Discover how the pointer’s adaptive precision enables people to quickly and confidently target interface elements regardless of their size. We’ll also share some best practices on adapting the pointer to complement your app’s unique needs including how to select pointer effects and design pointer shapes, integrate trackpad gestures, and keyboard modifiers.

Easily prototype and play around with SwiftUI views when you use them with Swift Playgrounds. We’ll show you how to build a SwiftUI view in a Xcode-compatible playground, and explore tools to help you easily edit and preview your code.

The Web Inspector makes introspection and debugging simpler than ever. Discover how you can use debugger stepping, editing cookies, and overriding network loaded resources to provide you with powerful development capabilities and help you create faster, more efficient websites.

Learn how to create Swift Playgrounds books that work fluidly across both Mac and iPad and help people of all ages explore the fun of coding in Swift. We’ll walk you through how to customize content for each platform while considering platform settings, and help you take advantage of them in your playgrounds while still providing a smooth cross-platform experience.

Move beyond step counting in your app and give people a much richer understanding of their mobility. We’ll detail how you can take advantage of mobility metrics in iOS and watchOS to measure movement in more distinct and actionable ways. Learn about the latest HealthKit APIs for accessing mobility data, strategies for meaningful data aggregation, and how to interpret results for people using your app.

For over 40 years, Apple has been working with educators to create technologies for students, teachers, and school administrators and help them share in a rich and meaningful learning experience. Explore the breadth of Apple’s education technologies, including classroom management apps and tools and developer frameworks for assessment and curriculum integration — and discover how your app can have a critical role in them all.

HealthKit helps you build world-class health and fitness apps by centralizing health data from third-party apps, iPhone, Apple Watch, and external health devices. Discover how you can manage authorization and privacy around Health data, read and write data to the shared Health Store, and use HealthKit’s built-in queries to fetch data and calculate statistics for that data.

The Nearby Interaction framework streams distance and direction between opted-in Apple devices containing the U1 chip. Discover how this powerful combination of hardware and software allow you to create intuitive spatial interactions based on the relative position of two or more devices. We’ll walk you through this session-based API and show you how to deliver entirely new interactive experiences — all with privacy in mind.

Privacy is a more important issue than ever. Learn about Apple’s privacy pillars, our approach to privacy, and how to adopt the latest features on our platforms that can help you earn customer trust, create more personal experiences, and improve engagement. Explore the transparency iOS provides when your app is recording using the microphone or camera, control over location with approximate location, tracking transparency and permissions, and much more.

Fine-tune your Objective-C headers to work beautifully in Swift. We’ll show you how to take an unwieldy Objective-C framework and transform it into an API that feels right at home. Learn about the suite of annotations you can use to provide richer type information, more idiomatic names, and better errors to Swift. And discover Objective-C conventions you might not have known about that are key to a well-behaved Swift API.

Swift Playgrounds presents “Swan’s Quest,” an interactive adventure in four chapters for all ages. In this chapter, our Hero must navigate a dark cave — and the only way to light the torches is to make them accessible.

Swift Playgrounds presents “Swan’s Quest,” an interactive adventure in four chapters for all ages. In this chapter, our Hero needs your help decoding the Swan’s scroll. Call forth the best of your audio abilities on this one — you’re going to need them.

Swift Playgrounds presents “Swan’s Quest,” an interactive adventure in four chapters for all ages. Calling all musicians! In this chapter, our Hero has found a mysterious scroll of music, and only you can help decode it. (Don’t worry if you can’t read music, our clever Lizard is standing by to assist. It’s sure to be a note-worthy experience.)

Swift Playgrounds presents “Swan’s Quest,” an interactive adventure in four chapters for all ages. It’s time for the grand finale: You’ve honed your skills with tones, but in this chapter our Hero needs to sequence multi-part harmony.

Discover how Macs with Apple silicon will deliver modern advantages using Apple’s System-on-Chip (SoC) architecture. Leveraging a unified memory architecture for CPU and GPU tasks, Mac apps will see amazing performance benefits from Apple silicon tuned frameworks such as Metal and Accelerate. Learn about new features and changes coming to boot and security, and how these may affect your applications.

See SwiftUI in action! Watch as engineers from the SwiftUI team build a fully-functioning app from scratch. Understand the philosophy driving this new framework and learn about the benefits of declarative-style programming. Take a look under the hood to understand how SwiftUI operates and learn how SwiftUI and Xcode 11 work together to help you to build great apps, faster.

iPad Apps for Mac is an easy way to bring your iPad app to the Mac while maintaining your single code-base. Learn about common Mac features that are automatically implemented for you. Find out how to work with iOS-only frameworks and what using them could mean for your app. Hear about some common usage patterns including how to use third-party frameworks and some setup tips and tricks. Get a taste for how you can make your new Mac app feel like a Mac app by incorporating platform-specific features.

SF Symbols introduces a comprehensive library of vector-based symbols that you can incorporate into your app to simplify the layout of user interface elements through automatic alignment with surrounding text, and support for multiple weights and sizes. Learn how easy it is to adapt to different screen sizes and layouts, and improve the accessibility and localizability of your app. Get details on how to create new symbols for your specific needs that perfectly match the visual style of SF Symbols.

Core ML 3 has been greatly expanded to enable even more amazing, on-device machine learning capabilities in your app. Learn about the new Create ML app which makes it easy to build Core ML models for many tasks. Get an overview of model personalization; exciting updates in Vision, Natural Language, Sound, and Speech; and added support for cutting-edge model types.

Multitasking is an exciting way to add power to your iPad app. It is easy to enable your app to run two instances of your interface side-by-side, and your customers will love it. Learn how to take your existing features like drag and drop and use them to easily create a second window. Find out how supporting multiple windows changes the app lifecycle and what that means for all applications. Hear about some common mistakes and how to solve them, setting you and your customers up for a fantastic experience.

Hear from the UIKit engineering team about the principles and concepts that anchor Dark Mode on iOS. Get introduced to the principles of enhancing your app with this new appearance using dynamic colors and images, and add an experience that people are sure to love.

Collection View Layouts make it easy to build rich interactive collections. Learn how to make dynamic and responsive layouts that range in complexity from basic lists to an advanced, multi-dimensional browsing experience.

Take your first deep-dive into building an app with SwiftUI. Learn about Views and how they work. From basic controls to sophisticated containers like lists and navigation stacks, SwiftUI enables the creation of great user interfaces, faster and more easily. See how basic controls like Button are both simple yet versatile. Discover how to compose these pieces into larger, full-featured user interfaces that facilitate building great apps with SwiftUI. Build your SwiftUI skills as you learn the essentials of Apple’s new declarative framework.

Use UI Data Sources to simplify updating your table view and collection view items using automatic diffing. High fidelity, quality animations of set changes are automatic and require no extra code! This improved data source mechanism completely avoids synchronization bugs, exceptions, and crashes! Learn about this simplified data model that uses on identifiers and snapshots so that you can focus on your app’s dynamic data and content instead of the minutia of UI data synchronization.

Meet PencilKit, Apple’s feature-rich drawing and annotation framework. With just a few lines of code, you can add a full drawing experience to your app — with access to a canvas, responsive inks, rich tool palette and drawing model. Hear the technical details that make a great Apple Pencil experience. Learn about the new screenshot editor and how you can adopt just a few small APIs to enable your full content to be captured beyond the size of the screen, with or without your app’s user interface.

Learn all about the many advances in the Vision Framework including effortless image classification, image saliency, determining image similarity, and improvements in facial feature detection, and face capture quality scoring. This packed session will show you how easy it is to bring powerful computer vision techniques to your apps.

SwiftUI was built from the ground up to let you write beautiful and correct user interfaces free of inconsistencies. Learn how to connect your data as dependencies while keeping the UI fully predictable and error free. Familiarize yourself with SwiftUI’s powerful data flow tools and understand what the best tool is for each situation.

SwiftUI is designed to integrate with your existing code base on any of Apple’s platforms. Learn how to adopt SwiftUI on any Apple platform by adding SwiftUI views into your app’s hierarchy, leveraging your existing data model and more.

Natural Language is a framework designed to provide high-performance, on-device APIs for natural language processing tasks across all Apple platforms. Learn about the addition of Sentiment Analysis and Text Catalog support in the framework. Gain a deeper understanding of transfer learning for text-based models and the new support for Word Embeddings which can power great search experiences in your app.

Xcode 11 displays previews of your user interface right in the editor, streamlining the edit-debug-run cycle into a seamless workflow. Learn how previews work, how to optimize the structure of your SwiftUI app for previews, and how to add preview support to your existing views and view controllers.

Document Camera and Text Recognition features in Vision Framework enable you to extract text data from images. Learn how to leverage this built-in machine learning technology in your app. Gain a deeper understanding of the differences between fast versus accurate processing as well as character-based versus language-based recognition.

macOS Catalina provides an easy way to bring your iPad app to the Mac while maintaining your single code-base. Hear about ways in which you can take your app beyond the default behaviors to optimize its interface for the Mac. Get an overview of APIs you can use and macOS design guidelines that need to be considered. Learn how the iPad app lifecycle comes across on the Mac, and get distribution details for your application.

MapKit and MapKit JS bring fully featured Apple Maps to your app and website. See how the latest features give you more control over the base map presentation, finer-grained search and result filtering of points of interest and address information, and integration with standard data formats for custom overlays and annotations.

Learn how to build custom views and controls in SwiftUI with advanced composition, layout, graphics, and animation. See a demo of a high performance, animatable control and watch it made step by step in code. Gain a deeper understanding of the layout system of SwiftUI.

Making your app accessible is critical, but just as important is designing a fantastic accessibility experience. Learn what makes a great experience and how to make your app understandable, navigable, and interactable. SwiftUI builds accessibility into your app for you! Discover how much you get with no extra adoption, like accessible images and controls. Identify where you can add supplemental accessibility information with the new SwiftUI Accessibility API, which gives you the tools to add information to elements such as labels, values, and hints.

Successful app development requires mastering a lot of different things. Discover practices you can incorporate into your development workflow to enhance your productivity, and improve your app’s performance and stability. Learn how to improve the quality of code you write with Xcode. Gain a practical understanding of some valuable development techniques.

Siri is the intelligence behind displaying what someone needs to know about at just the right moment. In iOS 13, we’re extending this capability to allow your apps to let Siri know when a reservation has been made and Siri can elevate checking in at the right time. Siri can also provide directions to the reservation in Maps, add the event to Calendar, and more. Discover how you can add the power of Siri Event Suggestions to your apps.

Dive into the details of window management in your Multitasking app, including how to properly handle creating, refreshing, and closing windows. Hear about best practices for when to refresh the content in your window and learn how to ensure your app’s visual state is up-to-date in the switcher.

The ClassKit framework helps you surface your app’s valuable educational content for inclusion in a teacher’s classroom curriculum. Get an overview of the ClassKit integration workflow, debugging instructor and student roles with the Schoolwork app, and new features designed to make publishing to ClassKit easier than ever.

Custom Actions simplify the experience for people using assistive technologies with your app and they can help you reduce the number of swipes and taps that are required to navigate through your interface and perform interactions. Learn how to leverage custom actions for use in VoiceOver and Switch Control. New in iOS 13, bring custom actions to Full Keyboard Access and Voice Control on iOS.

CarPlay is a smarter, safer way to use your iPhone in the car. Learn how to update your vehicle system to take advantage of new features in iOS 13. Add support for dynamically changing screen sizes, second screens such as instrument clusters, and even irregularly shaped displays. Learn how to support “Hey Siri” for hands-free voice activation.

Great accessibility labels are the difference between someone using and loving your app or someone deleting your app. Experience VoiceOver as demonstrated by an Apple Accessibility engineer as she navigates complex UI and demonstrates how descriptive labels are an easy way to ensure your app is for everyone.

Speech Recognizer can now be used locally on iOS or macOS devices with no network connection. Learn how you can bring text-to-speech support to your app while maintaining privacy and eliminating the limitations of server-based processing. Speech recognition API has also been enhanced to provide richer analytics including speaking rate, pause duration, and voice quality.

The Accessibility Inspector enables you to identify parts of your app that are not accessible. It provides feedback on how you can make them accessible, as well as simulating voice-over to help you identify what a Voice Over user would experience. Watch a live-demo of an app being fully debugged in the Accessibility Inspector, and learn how to leverage this powerful tool to make your apps better for everyone.

Learn how to target content for a specific window in your app. Find out how to identify which scene the system should open from a notification, a shortcut item, and other user activities.

App Store Connect continues to improve its role in each step of your app’s lifecycle with new features that make your app submission, management, and distribution experience better than ever. Learn about the latest enhancements and discover new ways to ensure each release of your app is better than the last.

Learn about the latest updates in StoreKit and dive deep into best practices for using server-to-server notifications to manage your subscribers.

Learn about the latest management enhancements for iOS, macOS, and tvOS and the evolution of management tools over the past year. You’ll discover how new MDM features help administrators manage devices more effectively, how new technologies deliver support for centrally managed authorization, and how Apple Business Manager and Apple School Manager have been enhanced to streamline management of your organizations apps, content, and devices.

Whether you want to share your app with a few colleagues, deliver it to employees within an organization, or release it to the world, there’s a distribution mechanism designed to fit your needs. Familiarize yourself with each app deployment model, learn how to choose the one that’s best for you, and learn about essential testing and distribution tools.

Start the week with a tour of new features in Xcode 11, designed to help you get from idea to product faster than ever. Discover new ways to edit and organize your source code, new capabilities for designing and previewing user interfaces, and great improvements for debugging and testing. Get an overview for sessions covering developer tools this year.

Learn how your app can support per-app language settings in iOS 13. Get the details on localizing assets with asset catalogs and simplifying your localization workflow with Xcode 11. Understand how to generate screenshots in multiple languages for localization and testing.

Swift packages are a great way to organize and share code, and are now supported while building apps for all Apple platforms in Xcode 11. Find out how to use community-developed packages in your project, how Swift packages are structured, and how package versioning and dependencies work.

Whether you want to publish code to share with the community, or you just want a convenient way to organize the code in your apps, Swift packages are here to help. Learn how to create local packages for your own development, how to customize your package via the manifest file, and how to go about publishing a package for others to use.

The Instruments app in Xcode provides a rich set of tools and templates for profiling your app performance. Learn all about Instruments and gain strategies for identifying bottlenecks in your code. See just how to leverage the power of time profiling and points of interest tracking to make meaningful changes to your code that can dramatically improve app responsiveness.

Xcode 11 introduces new features for finding and fixing bugs fast. Discover how to simulate network conditions and thermal states, and how to override your app’s runtime environment while debugging. See how the debugging features work with Xcode previews to identify issues before Build & Run. Learn how to work with the View Debugger to troubleshoot your SwiftUI views.

Unit testing is an essential tool to consistently verify your code works correctly. Learn about the built-in testing features in Xcode, using XCTest. Find out how to organize your tests and run them under different configurations using test plans, new in Xcode 11. Discover how to automate testing and efficiently work with the results.

Every programming language has a set of conventions that people come to expect. Learn about the patterns that are common to Swift API design, with examples from new APIs like SwiftUI, Combine, and RealityKit. Whether you’re developing an app as part of a team, or you’re publishing a library for others to use, find out how to use new features of Swift to ensure clarity and correct use of your APIs.

Xcode 11 now fully supports using and creating binary frameworks in Swift. Find out how to simultaneously support devices and Simulator with the new XCFramework bundle type, how Swift module interfaces work, and how to manage changes to your framework over time.

Learn about new ways to find and fix performance issues during daily development, beta testing, and public release on the App Store. Learn how to catch performance issues during daily development by measuring CPU, memory, and more in your XCTests. Discover how to find issues in the field during beta testing and public release using MetricKit. See how the Xcode Organizer now displays the most important metrics from your app aggregated from each version on the App Store.

Join us for a deep dive into the world of Simulator. Find out how Simulator works, discover features you might not know exist, and get a tour of the command-line interface to Simulator for automation. Learn about native GPU acceleration in Simulator via Metal, and how to optimize your Metal code to take advantage of it.

How you store data in your app affects not only disk footprint, but also the performance of your app and the battery life of the device. Learn techniques for optimizing data serialization, working with images, and syncing to disk. Find out how to take advantage of features in SQLite to improve performance and safety.

Apple’s open source toolset, Turi Create, recently added tasks for Core ML model creation including Drawing Classification and One-Shot Object Detection. Learn how to quickly use these capabilities in your apps as well as new techniques for visualizing and evaluating the performance of your custom models.

World-class apps deliver a great user experience, even in the most strenuous environments. Learn how to use Xcode to simulate adverse network and temperature conditions. Put your app through its paces and get a firsthand view of how it performs. Hear about best practices that you can adopt to respond to challenging conditions.

Slow app launches are frustrating. Learn about the new app launch instrument and discover how to make your app launch fast. Gain insights into what happens during app launch and how to minimize, prioritize, and optimize work at this critical time. Hear tips and tricks from the engineers making iOS apps launch fast.

Custom Core ML models for Object Detection offer you an opportunity to add some real magic to your app. Learn how the Create ML app in Xcode makes it easy to train and evaluate these models. See how you can test the model performance directly within the app by taking advantage of Continuity Camera. It’s never been easier to build and deploy great Object Detection models for Core ML.

Learn how to quickly and easily create Core ML models capable of classifying the sounds heard in audio files and live audio streams. In addition to providing you the ability to train and evaluate these models, the Create ML app allows you to test the model performance in real-time using the microphone on your Mac. Leverage these on-device models in your app using the new Sound Analysis framework.

Your iPhone and Apple Watch are loaded with a number of powerful sensors including an accelerometer and gyroscope. Activity Classifiers can be trained on data from these sensors to bring some magic to your app, such as knowing when someone is running or swinging a bat. Learn how the Create ML app makes it easy to train and evaluate one of these Core ML models. Gain a deeper understanding of how to collect the raw data needed for training. See the use of these models in action.

Recommendation models for Core ML can enable a very personal experience for the customers using your app. They power suggestions for what music to play or what movie to see in the apps you use every day. Learn how you can easily create a custom Recommendation model from all sorts of data sources using the Create ML app. Gain a deeper understanding of how this kind of personalization is possible while maintaining user privacy. See an example of one of these recommenders in action.

Create ML now enables you to create models for Natural Language that are built on state-of-the-art techniques. Learn how these models can be easily trained and tested with the Create ML app. Gain insight into the powerful new options for transfer learning, word embeddings, and text catalogs.

LLDB is a powerful tool for exploring and debugging your app at runtime. Discover the various ways to display values in your app, how to format custom data types, and how to extend LLDB using your own Python 3 scripts.

Bringing the power of Core ML to your app begins with one challenge. How do you create your model? The new Create ML app provides an intuitive workflow for model creation. See how to train, evaluate, test, and preview your models quickly in this easy-to-use tool. Get started with one of the many available templates handling a number of powerful machine learning tasks. Learn more about the many features for continuous model improvement and experimentation.

Core Haptics lets you design fully customized haptic patterns with synchronized audio. See examples of how haptics and audio enables you to create a greater sense of immersion in your app or game. Learn how to create, play back, and share content, and where Core Haptics fits in with other audio and vibration APIs.

Architected for AR, RealityKit provides developers access to world-class capabilities for rendering, animation, physics, and spatial audio. See how RealityKit reimagines the traditional 3D engine to make AR development faster and easier for developers than ever before. Understand the building blocks of developing RealityKit based apps and games, and learn about prototyping and producing content for AR experiences with Reality Composer.

ARKit is the groundbreaking augmented reality (AR) platform for iOS that can transform how people connect with the world around them. Explore the state-of-the-art capabilities of ARKit 3 and discover the innovative foundation it provides for RealityKit. Learn how ARKit makes AR even more immersive through understanding of body position and movement for motion capture and people occlusion. Check out additions for multiple face tracking, collaborative session building, a coaching UI for on-boarding, and much more.

Gain a practical understanding of RealityKit capabilities by developing a game using its easy-to-learn API. Learn the recommended approach for loading assets, building a scene, applying animations, and handling game input. See how entities and components express the powerful elements of RealityKit while providing flexibility for customization. Find out how to take advantage of built-in networking and get details about extending the game into an immersive muliti-player experience.

With iOS 13, ARKit and RealityKit enable apps to establish shared AR experiences faster and easier than ever. Understand how collaborative sessions allow multiple devices to build a combined world map and share AR anchors and updates in real-time. Learn how to incorporate collaborative sessions into ARKit-based apps, then roll into SwiftStrike, an engaging and immersive multiplayer AR game built using RealityKit and Swift.

Core ML 3 now enables support for advanced model types that were never before available in on-device machine learning. Learn how model personalization brings amazing personalization opportunities to your app. Gain a deeper understanding of strategies for linking models and improvements to Core ML tools used for conversion of existing models.

Location technologies are core to delivering context-based services within your app. Discover how the latest features in the Core Location Framework lay the groundwork for advanced ranging capabilities and delivers more options for you to clearly communicate your location needs to your users, and allow them to provide more granular access authorization to your app.

Background execution is a powerful tool your app can leverage to provide a great user experience. Learn about best practices to follow when running in the background, especially if you use VoIP or silent pushes, and an all-new scheduling API that enables long running processing and maintenance tasks.

System frameworks encrypt both data at rest and data in transit in a transparent way for you. This functionality is available by simply setting an attribute. However you may want to do more to protect your users’ data. CryptoKit is a new Swift framework that makes it easier and safer than ever to perform cryptographic operations, whether you simply need to compute a hash or are implementing a more advanced authentication protocol.

Keep up with new and evolving networking protocols and standards by leveraging the modern networking frameworks on all Apple platforms and following best practices for efficiency and performance. In this session, learn about Low Data Mode, Combine in URLSession, WebSocket, and improvements to network mobility.

Take your networking apps to the next level with advances in Bonjour, custom message framing handlers, and the latest in security. You’ll also learn how to understand your networking performance by collecting metrics, and how best to use the modern networking frameworks on Apple platforms.

Learn how easy it is to add support for NFC in your app and take advantage of the newest capabilities such as NDEF writing and support for widely adopted native tag protocols.

Accelerate framework provides hundreds of computational functions that are highly optimized to the system architecture your device is running on. Learn how to access all of these powerful functions directly in Swift. Understand how the power of vector programming can deliver incredible performance to your iOS, macOS, tvOS, and watchOS apps.

Your iOS app can now access files stored on external devices via USB and SMB. Understand best practices for creating a document-based app that reads, writes, and manages files on physical media or networked storage. Learn about enhancements to Quick Look on iOS and macOS that help you access and display file thumbnails.

Expand your knowledge of Combine, Apple’s new unified, declarative framework for processing values over time. Learn about how to correctly handle errors, schedule work and integrate Combine into your app today.

Combine is a unified declarative framework for processing values over time. Learn how it can simplify asynchronous code like networking, key value observing, notifications and callbacks.

The Foundation framework provides a base layer of functionality for apps and frameworks that’s used throughout the macOS, iOS, watchOS, and tvOS SDKs. Hear about valuable enhancements to Foundation collections, performance, internationalization features, and Swift integration.

Through stories, interviews, and artifacts we will uncover valuable design processes, techniques, and best practices of Apple Design Award winning apps and games.

Machine learning enables new experiences that understand what we say, suggest things that we may love, and allow us to express ourselves in new, rich ways. Machine learning can make existing experiences better by automating mundane tasks and improving the accuracy and speed of interactions. Learn how to incorporate ML experiences into your apps, and gain practical approaches to designing user interfaces that feel effortlessly helpful.

Discover how you can create a great Mac experience with your iPad app. Learn about essential techniques for adapting your iPad app’s layout and architecture for Mac, considerations for type and color, and how you can take advantage of macOS interfaces such as the menu bar, sidebar and window toolbar.

Learn essential sound and haptic design principles and concepts for creating meaningful and delightful experiences that engage a wider range of human senses. Discover how to combine audio and haptics, using the Taptic Engine, to add a new level of realism and improve feedback in your app or game.

Common assumptions can break when your app is used by a global audience. Learn about the many aspects of creating apps for different regions and languages. Understand how to use fonts and typography, layout techniques, and support text input so your app shines in all languages.

iOS 12 enhances the Cocoa Touch frameworks to improve app performance and deliver exciting new features. Learn about performance best practices, security improvements, tools for supporting multiple screen sizes and shapes, new APIs for iMessage apps, Siri Shortcuts, and Swift refinements. Find out which sessions you won’t want to miss throughout the week.

Siri Shortcuts are a powerful new feature in iOS 12 that allow your app to expose its functionality to Siri. This enables Siri to suggest your shortcut at relevant times based on various context. Shortcuts can also be added to Siri to run with a voice phrase on iOS, HomePod and watchOS. Learn how to expose shortcuts in your app using NSUserActivity and discover the benefits of creating custom intents with SiriKit for a richer user experience.

Siri Shortcuts are a great way to help people execute actions or get information from your app, but shortcuts can be made even more powerful by adding them to Siri to be used with a simple phrase. Learn how you can now customize responses from Siri and add custom UI to make a great shortcuts experience across iOS, watchOS and HomePod. See how to allow users to add and manage shortcuts from right within your app and learn best practices to make shortcut suggestions that can be exposed through Settings.

Learn how to use Siri Shortcuts to bring glanceable information and custom interactions to the Siri watch face. Walk through how to create a compelling user experience by providing relevant shortcuts and by donating interactions from your app. See how these experiences can be created from both watchOS and iOS.

Get a glimpse inside to find out what happens when you add a constraint! Dive into the internals of Auto Layout to develop intuition for how your code affects what happens under the hood. Learn how to measure and refine your approach to Auto Layout and see how its improved performance in iOS 12 will speed up your app.

Leverage the abilities of TextKit to provide the best experience possible displaying and editing text. Get the best performance out of your app by using TextKit effectively. Learn the concepts to do more complex handling, layout and presentation.

UICollectionView is a flexible, powerful tool to help you achieve great user experiences in your applications. Hear how you can leverage these rich APIs to rapidly move from initial design ideas to polished shipping applications. Topics range from getting started to advanced update animations and layouts.

Every app uses collections! Go beyond the basics with specific tips on how best to use indices, slices, bridging, laziness, and reference types. Gain better understanding of when to use each collection for best performance.

iOS contains powerful technologies you can use to make your app truly delightful. Learn how to take your app to the next level with easy-to-implement features such as Handoff and External Display support. Preserve that feeling of magic in your app with pro-tips that combine animations, gestures and layout, while keeping your scrolling smooth, and your code scalable. Dive into the anatomy of a launch to get your app responsive quickly, and learn some great debugging tricks from the pros!

Ground-up coverage of how to make an app that can fit on devices of every size and shape. Make your app fit beautifully on Apple’s full range of devices with the minimum amount of effort, future-proofing your user experience along the way.

Hear about the latest advancements in Swift, the safe, fast, and expressive language. Find out about improvements to build times, code size, and runtime performance. Learn how to take advantage of new features in your code that eliminate boilerplate, increase safety and security, and improve your overall development productivity.

Hear about exciting improvements to code coverage, including how you can build your own automation on top of Xcode’s coverage reports. Learn how to dramatically speed up the execution of your tests by leveraging distributed parallel testing, new in Xcode 10.

The localization process in Xcode 10 has been updated to aid you through the lifecycle of exporting, importing, and testing localized content in your apps. See new functionality added in Xcode 10 and learn how the new localization catalog helps you build world-class, localized apps.

Generics are one of the most powerful features of Swift, enabling you to write flexible, reusable components while maintaining static type information. Learn about the design of Swift’s generics, including how to generalize protocols, leverage protocol inheritance to express the varying capabilities of related types, build composable generic components with conditional conformances, and reason about the interaction between class inheritance and generics. This expanded version of the WWDC 2018 session includes a brand-new discussion of recursive constraints.

All apps benefit from a focus on performance and an increase in overall responsiveness. This information packed session gives you strategies for fixing performance problems using Instruments and other tools. Additionally, get practical advice based on experience in tuning Apple’s own apps including Xcode and Photos on iOS.

The Swift Package Manager makes it possible to easily develop and distribute source code in the Swift ecosystem. Learn about its goals, design, unique features, and the opportunities it has for continued evolution.

Discover advanced techniques, and tips and tricks for enhancing your Xcode debugging workflows. Learn how to take advantage of LLDB and custom breakpoints for more powerful debugging. Get the most out of Xcode’s view debugging tools to solve UI issues in your app more efficiently.

Ever wonder what happens when you build your project in Xcode? Learn how Xcode automates the steps required to build an application, and go behind the scenes to learn how clang, swiftc, and the linker work together to turn your source code into a working program.

Testing is an essential tool to consistently verify your code works correctly, but often your code has dependencies that are out of your control. Discover techniques for making hard-to-test code testable on Apple platforms using XCTest. Learn a variety of tips for writing higher-quality tests that run fast and require less maintenance.

ARKit 2 makes it easy to develop vivid augmented reality experiences and enable apps to interact with the real world in entirely new ways. Discover how multiple iOS devices can simultaneously view an AR scene or play multiplayer AR games. Learn about new capabilities for tracking 2D images, and see how to detect known 3D objects like sculptures, toys, and furniture.

Apple is on a mission to advance the state of Mac security, and we want your apps to be there with us. Learn about new protections for user data, new capabilities with Developer ID, and how you can best secure your apps.

Local and push notifications enable your app to keep users informed with timely and relevant content, by displaying messages and accepting users’ actions, or playing distinctive sounds, or updating the badge on your app icon. Improvements to rich notifications help you create more engaging content and better manage notifications. Find out what’s new and get expert advice on implementing user notifications in your app.

Grouping the notifications your app sends helps people get more information at a glance and manage multiple notifications at once. Learn how to implement Grouped Notifications in your app.

Get the latest news and updates from the Wallet and Apple Pay team. Learn how iPhone and Apple Watch can power innovative commerce experiences. Hear about the latest design best practices for Apple Pay. And discover how to create your own contactless passes for rewards cards, gift cards, tickets and more.

Great Design isn’t magic, it is crafted with care by real people. Explore the characteristics of great design through the voices of designers from Apple and our developer community. Learn how they take inspiration from everyday life, conceive and refine ideas, and push themselves to design apps and games that can stand the test of time.

Great app experiences leap off the screen. They are dynamic, immersive, personal, and, above all else, the result of a strong and clear intent. Learn key techniques for being intentional with your design by choosing appropriate metaphors, making extreme choices, and making every interaction feel more authentic and natural.

An in-depth exploration of essential interaction, visual and sound design principles and techniques through the design of a simple button.

Engaging AR experiences are easy to start and navigate, persuasively realistic, and highly immersive. Learn best practices for successfully bringing people into an AR experience, teaching them about how to interact and engage with virtual content, and making your AR content look beautiful and grounded in the real world.

Thoughtfully designed notifications are a powerful way to communicate timely information to people that they will find valuable and useful. Learn how you can design notifications people want to receive by making them beautiful, helpful, actionable, and respectful of their valuable time and attention.

So much power has been added to animations on iOS since their inception that it’s time to think about animations in a whole new way! Learn to combine and coordinate between multiple animations, resulting in interactive transitions and learn some tips and tricks along the way.

Learn about the dyld dynamic linker used on Apple platforms, how it’s changed over the years, and where it’s headed next. Find out how improved tooling makes it easier to optimize your app’s launch time, and see how new changes coming in dyld will bring even further launch time improvements.

Unit testing is an essential tool to consistently verify your code works correctly. Discover techniques for designing the code of your app so that it can be easily tested. Find out the best practices for developing a test suite that evolves with your app and scales as your app grows.

macOS 10.13 and iOS 11 have reinvented how Grand Central Dispatch and the Darwin kernel collaborate, enabling your applications to run concurrent workloads more efficiently. Learn how to modernize your code to take advantage of these improvements and make optimal use of hardware resources.

Apple Pay is the easy and secure way to accept payments in your app and website on iPhone, iPad, Apple Watch, and Mac. Get the latest news and updates from the Wallet and Apple Pay teams. New for this year, increase your conversions by providing feedback to users right in the Apple Pay sheet. Discover great new Wallet features like pass sharing controls, and increase customer satisfaction and sales with UI best practices.

Core NFC is an exciting new framework that enables you to read NFC tags in your apps on iPhone 7 and iPhone 7 Plus. Learn how to integrate Core NFC into your apps, key requirements for using this feature, and start thinking about the new kinds of apps that are enabled with NFC capabilities.

Design principles are the key to understanding how design serves human needs for safety, meaning, achievement and beauty. Learn what these principles are and how they can help you design more welcoming, understandable, empowering and gratifying user experiences.

Engage people from the first moment they open your app, and keep them coming back for more. Learn tips on how to make a compelling first impression, methods for teaching new users about your app, and best practices when asking users for more information.

Learn how to quickly build interactive prototypes! See how you can test new ideas and improve upon existing ones with minimal time investment and using tools you are already familiar with.

Direct onscreen manipulation is the cornerstone of the user experience on iOS. iOS 10 includes new support for making onscreen interactions even more immersive and interactive. Dive straight into the philosophy and techniques of building completely interactive, interruptible animations in your apps.

GameplayKit provides developers a collection of essential tools and techniques used to implement modern gameplay algorithms. Learn what’s new in GameplayKit and check out advances in pathfinding, autonomous agents, and game AI, as well as many enhancements supporting GameplayKit in Xcode. Tap into new capabilities for 2D and 3D spatial partitioning, and explore noise-based procedural data generation useful for height maps, natural textures, and more.

The new Unified Logging and Tracing System for iOS and macOS uses Activity Tracing for performance, consolidates kernel and user-space logging, and has many other improvements. Learn how Logging and Tracing can help you debug and troubleshoot issues with your apps.

Operations are a flexible way to model your app’s business logic, but they can do so much more. See how NSOperation forms the heart of the WWDC app, and how using features like dependencies, readiness, and composition allow you to quickly and easily build dynamic and complex apps.

Learn about the touch input and drawing pipelines. Gain specific insights in how best to design your app to minimize latency in receiving touches and maximizing the performance of drawing content on the screen. Explore new API in UIKit and learn best practices for faster and smoother input.

Xcode 7 introduces new UI testing features fully integrated into the IDE. Learn about the new APIs and how UI testing fits in with existing testing features in Xcode. See how to get started by recording your app, and how to efficiently craft and maintain UI tests.

GameplayKit provides a collection of essential tools and techniques used to implement gameplay logic. Get introduced to the GameplayKit framework and see how to put its capabilities to work in your own titles. Learn about managing state machines, controlling game entities, and implementing rule systems. Dive into its built-in tools for randomization, pathfinding, and advanced simulation.

View controllers are fundamental to creating apps on iOS. Learn about the enhancements made to view controllers in iOS 8 to improve the user experience in your apps. Dive into using and creating transition coordinators and find out about all-new additions to split view controllers and navigation controllers.

iOS 8 brings you powerful new means of presenting content within your apps. Hear how presentation controllers were leveraged by UIKit to give you fine grain control using new alert and searching APIs. Dive deep into how presentation controllers work and how you can use them to present content within your app in exciting new ways.

Explore a selection of high-level software engineering techniques presented in the context of Cocoa Touch. Learn how to manage complexity in large codebases by clearly defining where truth resides, by controlling state with Swift’s powerful value types and immutability, and by thinking in terms of composition.

Building an advanced user interface with collection view requires a great design, careful code architecture, and often times a custom layout. Learn how the iTunes team used UICollectionView to deliver a new version of the iTunes Connect app with an updated user interface incorporating pinning headers, swipe to edit and reorder, and a manageable code-base.

Learn what the iWork engineers did to ship iWork for iOS and Mac from a single codebase. Explore the patterns for sharing code between desktop and mobile, and see how you can optimize your code and write great apps.

Scrollviews build on gesture recognizers and underlying multi-touch mechanics to provide a fundamental piece of the iOS user experience. Gain a broader understanding of the iOS touch handling architecture through practical real-world examples. Discover advanced tips and tricks for combining scrolling with other touch handling techniques to create delightful user interfaces.

Learn how to fluidly transition interactive UI elements from gesture-driven control to animated transitions. Take advantage of new iOS 8 behavior to smoothly transition between several animations on the same view. Discover architectural approaches to interfaces which remain interactive while they animate.

Creating a responsive UI requires an understanding of Core Animation and how mobile GPUs work. Learn about the iOS rendering pipeline in Core Animation, the new UIVisualEffectView and how it utilizes the GPU. Find out about the available tools for profiling UI performance. See how to identify and fix performance issues on a variety of devices.

Text Kit is the powerful new text engine and API in iOS 7, providing sophisticated text handling and typesetting capabilities. Learn about Text Kit and how easy it can be to manipulate text on the fly, adjust text attributes, and apply the power of Core Text with fewer lines of code.

View controllers now allow you to create custom transitions, giving you expanded control over your user interface. Learn how to take advantage of custom transitions by using powerful new animation APIs, explore changes with full screen layouts, and see how to use navigation controllers with collection views to create a truly immersive experience.

Move beyond the basics and unlock the full power of Text Kit for advanced text handling in your apps. Understand how to use hit detection and pixel-perfect layout information for responding to user touches. Discover new text effects, including a sophisticated letterpress look, and dive deeper into the mechanics of Text Kit for displaying multi-page documents and custom layouts.

XPC has been enhanced to make it even easier to design for robustness and efficiency. Learn how to save power by opportunistically scheduling long-running tasks, transferring large amounts of data with minimal overhead, and how to best compartmentalize your app.

Text is an essential part of your application’s interface. Get an introduction to the concepts behind manipulating and drawing attributed strings on iOS. Learn how UIKit has adopted attributed strings to make creating text effects even easier.

Dive deeper into advanced techniques when using attributed strings on iOS 6. Learn about kerning, ligatures, and other advanced typographical features of string drawing to create compelling text effects.

Come learn about how to achieve the appearance of infinite scrolling in either one or two dimensions. We’ll also look at how to change the resolution of drawn content during zooming, without requiring the use of CATiledLayer.

UIKit has strong ties to Core Animation, and an understanding of this relationship can provide important insight into the behavior and performance of your UIKit application. We’ll walk through the fundamentals of UIView and CALayer geometry, convert a pure Core Animation application to use UIKit, and explore some tools Core Animation offers to enhance your application’s appearance and performance. Learn various techniques to provide optimal edge anti-aliasing, group opacity, clipping, shadows and more.

Core Animation is the layer-based animation system at the heart of the dynamic user experience seen in iOS and Mac OS X. See Core Animation in action and explore its intuitive programming model for creating compelling animations. Understand how to maintain high frame rates and learn recommended practices to deliver smooth transitions and effects in your apps.

The Foundation framework provides the “nuts and bolts” classes for both iPhone OS and Mac OS programming, and an understanding of the Foundation framework is essential for building great software on the Mac, iPhone, and iPad. Learn about the wide-ranging capabilities of the Foundation framework and discover how to best use features like collections, strings, archiving, notifications, preferences, bundles, and more.

Even the best apps crash sometimes. Diagnosing and fixing your app’s crashes can make the difference between improving it or losing your customers. Learn the skills you need to identify and fix your crashes and avoid common pitfalls.