Game Center "Done" button issue? - ios

Question

The "Done" button in Game Center will not dismiss the controller. My code to dismiss the view controller is exactly the same everywhere I look. I've looked at similar questions on here but no luck. Can anyone help me?
GameScene.Swift (This serves as my 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 this 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 a touch begins */
for 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()
}
}
}
}

Answer 1

In my func showLeaderboard(), I had to add the line gc.gameCenterDelegate = self which made the "Done" button work.
I hope other people who have this same problem see this potential fix.
func showLeaderboard() {
let vc = self.view?.window?.rootViewController
let gc = GKGameCenterViewController()
gc.viewState = GKGameCenterViewControllerState.Leaderboards
gc.gameCenterDelegate = self
gc.leaderboardIdentifier = "I removed this part"
vc!.presentViewController(gc, animated: true, completion: nil)
}