Game Center Authentication More than Once Swift -


my code follows:

func authenticatelocalplayer() {      let localplayer: gklocalplayer = gklocalplayer.localplayer()     localplayer.authenticatehandler = {(viewcontroller, error) -> void      in         if((viewcontroller) != nil) {             self.presentviewcontroller(viewcontroller, animated: true, completion: nil)         } else if (localplayer.authenticated) {             print("local player authenticated")             self.gcenabled = true             if self.gcenabled == true {                 self.showleaderboard()                 self.activity.stopanimating()             }             // default leaderboard id             localplayer.loaddefaultleaderboardidentifierwithcompletionhandler({ (leaderboardidentifer: string!, error: nserror!) -> void in                 if error != nil {                     println(error)                 } else {                     self.gcdefaultleaderboard = leaderboardidentifer                 }             })         }              else {                 self.gcenabled = false                 print("local player not authenticated, disabling game center")                 print(error)                 if((viewcontroller) != nil) {                 self.presentviewcontroller(viewcontroller, animated: true, completion: nil)             }          } } }    func showleaderboard() {      let gcvc: gkgamecenterviewcontroller = gkgamecenterviewcontroller()     gcvc.gamecenterdelegate = self     gcvc.viewstate = gkgamecenterviewcontrollerstate.leaderboards     gcvc.leaderboardidentifier = leaderboardidentifier     self.presentviewcontroller(gcvc, animated: true, completion: nil) }

this code works fine first time leaderboard button clicked (in use @ibaction , call function), however, if prompted log in , click "cancel", , click button again, not work. (meaning log in page not appear). ideas? help!


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