Integrate Gamecenter in cocos2d game

Question

Is there any one who knows how to integrate game center in Cocos2d. Please tell me steps so i can integrate that in my Game.

Answer 1

Although Alexander Blunck's answer is reasonable, for earlier versions of iOS (such as 3.2) the following line will fault, which is not what you want.

window.rootViewController = viewController;

If you are going to use Steffen's code (ugh) then you might want to add a method to set the ui view controller directly rather than having it assume it can be grabbed via UIApplication.