Swift and Objective-C Interoperability

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.

Great performance is a prerequisite for delivering a compelling and immersive app experience that keeps users engaged. Learn best practices and strategies for characterizing and improving the performance of your code for iPhone, iPad, and Apple Watch.

Small improvements can make a big impact on your iOS app’s performance and launch time. Learn best practices to optimize your UIKit-based applications. See how to future-proof your app for what may be next, and walk through numerous real world examples for more responsive and dynamic collection and table views.

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.