which delegate method will call while clicking device close button

On clicking device close button. Which method will call.

I launch the application and navig开发者_如何学Goated to other view controller. i displaying popOverViewController and closing the application. again relaunching application. its redirecting to home screen and displaying popOverviewController.

But I want to know when clicking the device close button which method will call?

So i can dismiss my popoverviewcontroller there.

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Check the UIApplicationDelegate Protocol Reference. Probably you need - (void)applicationWillResignActive:(UIApplication *)application.

Be sure to check the docs for your view controller's viewWillDisappear etc also.