Writing Game Center Apps in iOS: Bringing Your Players Into the Game (1)

By: Vandad Nahavandipoor

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Synopsis: Now that Apple has introduced the GameKit framework to its iOS SDK, you can integrate Game Center features directly into your iPhone and iPad apps. This concise cookbook shows you how it's done, with 18 targeted recipes for adding leaderboards, user authentication, achievements, multiplayer games, and many other features.How do you display players' scores and achievements? How do you create Game Center accounts and add friends? Each recipe in this book includes a simple code solution you can put to work immediately, along with a detailed discussion that offers insight into why and how the recipe works.Recipes include techniques to:Set up Game Center for an iOS AppUse block objects and Grand Central Dispatch to write Game Center appsAuthenticate a local player in Game CenterUse iTunes Connect to create leaderboards and achievementsRetrieve leaderboard and achievement information programmaticallyHandle players' state changes in multiplayer games