text: Q:
  
  GKGameCenterViewController Bug In IOS8
  
  Has anybody else suffered this - Loading GKGameCenterViewController on devices running IOS8 fails to return Game Center data or present Navigation Buttons for dismissing view.  Code is standard from Game Center Programming Guide and has worked for months on devices running IOS7.  Update IOS from 7 to 8 and BOOM!, the GKGameCenterViewController loads white transparent background only and no other content.  User is trapped in view with no Game Center data and no "Done" button to dismiss the view.  My app was released 5/14 and this happened when I updated iPad to IOS8 on Sep, 19th, 2014
  
  A:
  
  Looks like GKGameCenterViewControllerStateDefault is the culprit (a bug).  Add this prior to presenting the view:
  gc.viewState = GKGameCenterViewControllerStateLeaderboards;
  
  