Question

im trying to apply a method in this method from a view controller in my game
when a call received to pause the game.

- (void)applicationWillResignActive:(UIApplication *)application

any idea?

Answer 1

The other answers are correct in that -applicationWillResignActive: is called on the application delegate so you just have to have that method written in your delegate to respond to that event. However if you want to write code in your view controller to listen for this event you can register for the UIApplicationWillResignActiveNotification from your view controller. For example:

[[NSNotificationCenter defaultCenter] 
    addObserver:self 
       selector:@selector(pauseGame:) 
           name:UIApplicationWillResignActiveNotification 
         object:nil];

See Apple Documentation search for UIApplicationWillResignActiveNotification.