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Possible Duplicate:
How to tell when controller has resumed from background?
How to refresh View after user enters applicationWillEnterForeground?
I want to complete recall for example HomeViewController.
I have and update function in HomeViewController and I want when user enters to call update function and reload table data.
Any class can register to
UIApplicationWillEnterForegroundNotification, and react accordingly. It’s not reserved to the app delegate, and helps for better separation of source code.