GKViewController The abstract base protocol adopted by GameKit view controller classes. Declarationprotocol GKViewController RelationshipsConforming TypesGKAchievementViewControllerGKChallengesViewControllerGKFriendRequestComposeViewControllerGKGameCenterViewControllerGKLeaderboardViewControllerGKMatchmakerViewControllerGKTurnBasedMatchmakerViewController See AlsoGame Center interfacesAdding an access point to your gameDisplaying the Game Center dashboardGKAccessPointGKDialogController