Application did enter background function

问题

Hey I got a pretty low interval timer in my firstViewController which I would like to terminate when the app enters background, but how am I supposed to access it from my Applications AppDelegate file where the function is located. I know this is extremely dumb question, but I would appreciate help. Thanks!

回答1:

In your firstViewController, you would listen for UIApplicationDidEnterBackgroundNotification.

In the firstViewController init method:

- (void)addObserver:(id)notificationObserver selector:(SEL)notificationSelector name:(NSString *)notificationName object:(id)notificationSender

来源：https://stackoverflow.com/questions/5327278/application-did-enter-background-function