I'm writing a timer app. Unlike Apple's Clock app, it cannot run in the background once the user has left the application. Understandably, the user may not be aware of this. So, with that it mind, I would like my app to request confirmation of the user's desire to quit whenever the home button is pressed. A style sheet would pop up to inform the user of the consequences. 1. Is it possible? 2. Is it bad style?