检测iOS上的传入NotificationCenter通知

Question

Is there an API that allows me to know when NotificationCenter will pop a notification on the top of the screen while my app is running (for example for an incoming Message or email)?

It causes a big performance glitch to my game so I'd like to pause it and unpause once the notification has disappeared. If there is no event to listen to I can only think of monitoring FPS and pausing for a few seconds if it drops below a threshold. Any other suggestions?

Answer 1

EDIT: My answer is only for popup notifications, not for the ones that scroll on to the top of the screen. Sorry :(

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In your app delegate, the method

- (void)applicationWillResignActive:(UIApplication *)application

will be called.

And then

- (void)applicationDidBecomeActive:(UIApplication *)application

when it's time to start up again.