GKLeaderboardViewControllerDelegate protocol is implemented by delegates of the
GKLeaderboardViewController class. The delegate is called when the player dismisses the leaderboard.
Called when the leaderboard view is dismissed.
- (void)leaderboardViewControllerDidFinish:(GKLeaderboardViewController *)
The leaderboard view controller that was dismissed by the player.
Your delegate should dismiss the view controller. If your game paused any gameplay or other activities, it can restart those services in this method.
Available in OS X v10.8 and later.
Deprecated in OS X v10.10.