iPhone + save state of application in case of any interruption

Question

I have developed a game as iPhone application. Everything is completed and I am ready to upload it on App Store. I need to implement only one feature and that is, when any interruption occurs like a phone call / a sms / a notification, I want to save the current state of game so that whatever user chooses: either to handle that interruption or to cancel that interruption, the game should start again from the same stage. How might I do this?

Answer 1

Handle the

- (void) applicationWillTerminate: (UIApplication *) application

message in your UIApplicationDelegate. See the docs.