ios - Game Center "Done" button issue? -

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the "done" button in game center not dismiss controller. code dismiss view controller same everywhere look. i've looked @ similar questions on here no luck. can me?

gamescene.swift (this serves start menu )

class gamescene: skscene, gkgamecentercontrollerdelegate {   var startbtn = skspritenode(imagenamed: "play button") var title = sklabelnode(fontnamed:  "avenirnext-ultralight") var leaderboardbuttonimage = skspritenode(imagenamed: "leaderboard button")  override func didmovetoview(view: skview) {      let bounds = uiscreen.mainscreen().bounds     self.scene?.size = cgsize(width: bounds.size.width, height: bounds.size.height)      scene?.backgroundcolor = uicolor.whitecolor()      startbtn.position = cgpoint(x: self.frame.width / 2 - 100, y: self.frame.height / 2)     startbtn.size = cgsize(width: 140, height: 55)     self.addchild(startbtn)      leaderboardbuttonimage.position = cgpoint(x: self.frame.width / 2 + 100, y: self.frame.height / 2)     leaderboardbuttonimage.size = cgsize(width: 140, height: 55)     self.addchild(leaderboardbuttonimage)  }      func showleaderboard() {      let vc = self.view?.window?.rootviewcontroller     let gc = gkgamecenterviewcontroller()      gc.viewstate = gkgamecenterviewcontrollerstate.leaderboards     gc.leaderboardidentifier = "i removed part"     vc!.presentviewcontroller(gc, animated: true, completion: nil)    }  func gamecenterviewcontrollerdidfinish(gamecenterviewcontroller: gkgamecenterviewcontroller) {      gamecenterviewcontroller.dismissviewcontrolleranimated(true, completion: nil)   }     override func touchesbegan(touches: set<uitouch>, withevent event: uievent?) {     /* called when touch begins */      touch in (touches ) {         let location = touch.locationinnode(self)          if (startbtn.containspoint(location)) {              self.view?.presentscene(gameplayscene(), transition: sktransition.crossfadewithduration(1.0))             gameplayscene().scalemode = .resizefill             startbtn.removefromparent()             title.removefromparent()             leaderboardbuttonimage.removefromparent()          }          if (leaderboardbuttonimage.containspoint(location)) {              showleaderboard()          }      }  }    }

in func showleaderboard(), had add line gc.gamecenterdelegate = self made "done" button work.

i hope other people have same problem see potential fix.

func showleaderboard() {  let vc = self.view?.window?.rootviewcontroller let gc = gkgamecenterviewcontroller()  gc.viewstate = gkgamecenterviewcontrollerstate.leaderboards gc.gamecenterdelegate = self gc.leaderboardidentifier = "i removed part" vc!.presentviewcontroller(gc, animated: true, completion: nil)  }

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