How to accept Game Center invite in swift - swift

Question

I have some troubles to make the invite accept in swift.
could someone help me with the right coding? Here is mine
GKMatchmaker.sharedMatchmaker().matchForInvite(Invitation!, completionHandler = {(InvitedMatch:GKMatch!, error: NSError!) -> Void in
if InvitedMatch != nil {
myMatch=match
LocalGame=false
if let scene = GameScene.unarchiveFromFile(environment_Prefix!+"GameScene") as? GameScene {
// Configure the view.
let skView = self.view as SKView!
//skView.showsFPS = true
//skView.showsNodeCount = true
/* Sprite Kit applies additional optimizations to improve rendering performance */
skView.ignoresSiblingOrder = true
/* Set the scale mode to scale to fit the window */
scene.scaleMode = .Fill
skView.presentScene(scene, transition: SKTransition.flipVerticalWithDuration(2.0))
}
}
})
Thanks

Answer 1

Finally I have figured out the solution which works. I had to implement the GKLocalPlayerListener like this and call the match for invite within the delegate function.
func player(player: GKPlayer!, didAcceptInvite invite: GKInvite!) {
GKMatchmaker.sharedMatchmaker().matchForInvite (invite, {(InvitedMatch, error) in
if InvitedMatch != nil {
myMatch=InvitedMatch
LocalGame=false
if let scene = GameScene.unarchiveFromFile(environment_Prefix!+"GameScene") as? GameScene {
// Configure the view.
let skView = self.view as SKView!
//skView.showsFPS = true
//skView.showsNodeCount = true
/* Sprite Kit applies additional optimizations to improve rendering performance */
skView.ignoresSiblingOrder = true
/* Set the scale mode to scale to fit the window */
scene.scaleMode = .Fill
skView.presentScene(scene, transition: SKTransition.flipVerticalWithDuration(2.0))
}
}
})
}
To get the player function called I have to register the listener at the local player authenticated block like this:
localPlayer.registerListener(self)
Now game invite works perfectly.