How to react to applicationWillResignActive from anywhere?

Question

What\'s the code to subscribe to an event like applicationWillResignActive in any place in your iphone application?

[UPDATE]

Let me rephrase my question. I

Answer 1

Implement the method below in your application delegate:

-(void)applicationWillResignActive:(UIApplication *)application

This allows you to react when the application becomes inactive - when this is the case, it is executing but not dispatching incoming events. This happens, for example, when an overlay window pops up or when the device is locked.

Just before it becomes inactive, the application also posts a UIApplicationWillResignActiveNotification.