Written by Stefan Herold

Description: Game Center now supports persistent player identifiers scoped to individual games or to a developer team ID. Understand how scoped identifiers enhance player privacy and see how to transition your apps and games onto the recommended API.

• GKLocalPlayer represents authenticated player. Has persistent teamPlayerID & gamePlayerID
• GKPlayer provides info about other players. Uses scoped IDs
• Scoped IDs teamplayerID and gamePlayerID
  • properties on GKPlayer
  • increase player privacy
  • replace the playerID (has been deprecated) with scoped IDs (save game data / backend)
  • perform conversion after next authentication
  • teamPlayerID scoped to development team
  • gamePlayerID scoped to game

• loadPlayersForIdentifiers:withCompletionHandler:

This note was originally published at github.com/Blackjacx/WWDC.