Game Center integration with Sprite Kit? - ios

Question

How can I use Game Center or the GameKit Framework with a Sprite Kit Xcode template?
In Sprite kit, it uses Scenes; but normally to view the leaderboards for example you need to "presentModalViewController" but that is not possible in SKView.
And how can I authenticate the player and all that other fun stuff in iOS 6.
Thanks in advance!

Answer 1

You can use "presentModalViewController" by using this code to access the root view controller
UIViewController *vc = self.view.window.rootViewController;
[vc presentViewController: gameCenterController animated: YES completion:nil];
Now you can access your ModelViewController anywhere include in SKScenes. I did it in my newest game and it worked well
Besides, I suggest you use the separate object to control game center like leaderboard and achievement so you can reuse it in your next game.

Answer 2

Here is an updated authenticate local player, but Ravindra's code also works.
- (void) authenticateLocalPlayer
{
GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer];
localPlayer.authenticateHandler = ^(UIViewController *viewController, NSError *error){
if (viewController != nil)
{
//showAuthenticationDialogWhenReasonable: is an example method name. Create your own method that displays an authentication view when appropriate for your app.
//[self showAuthenticationDialogWhenReasonable: viewController];
}
else if (localPlayer.isAuthenticated)
{
//authenticatedPlayer: is an example method name. Create your own method that is called after the loacal player is authenticated.
//[self authenticatedPlayer: localPlayer];
}
else
{
//[self disableGameCenter];
}
};
}

Answer 3

Swift 2.0
func authenticateLocalPlayer() {
let localPlayer = GKLocalPlayer.localPlayer()
localPlayer.authenticateHandler = { (viewController, error ) -> Void in
if (viewController != nil) {
let vc:UIViewController = self.view!.window!.rootViewController!
vc.presentViewController(viewController!, animated: true, completion:nil)
} else {
print ("Authentication is \(GKLocalPlayer.localPlayer().authenticated) ")
GlobalData.loggedIntoGC = true
// do something based on the player being logged in.
GlobalData Swift File:
static var loggedIntoGC:Bool = false
Call Method in your scene where Game Center is being enabled:
ie HUD or GameScene in the
override func didMoveToView(view: SKView)`
authenticateLocalPlayer()

Answer 4

you can authenticate like this
[[GKLocalPlayer localPlayer] authenticateWithCompletionHandler:^(NSError *error) {
if (error == nil)
{
static_setEnable( true );
NSLog(#" Authenticate local player complete");
}
else
{
static_setEnable( false );
NSLog(#"Authenticate local player Error: %#", [error description]);
}
}];
}