Game Center and Social Media - Beginning iOS6 Games Development - page 215

displaying scores, as well as a list of the achievements available in the game. Figure 9-1 shows a
typical Game Center screen.
Figure 9-1. Game Center showing games
In Figure 9-1 , we see nine installed games that support Game Center. Select a game to view its
leaderboards and any achievements the user has earned.
From a developer's perspective, Game Center is a set of classes used to interact with Game Center
to define the leaderboards and achievements. Collectively, these classes are called GameKit, which
is available as part of your standard iOS SDK installation. Once GameKit is integrated with your
game, will be able to sign the user in and perform GameKit operations on his or her behalf.
Figure 9-2 shows the user being signed into GameKit.