quit app in iOS4

I have an old app which did many UI initialization work in viewDidLoad of various views. In iOS4 home button just put the app in background so viewDidLoad won't get called when re-launching the app.

I don't want to put those 开发者_如何学Goinitialization procedures in viewWillAppear as it is unnecessary to re-initialize the data every time the view appear.

How can I completely quit my app when user press the home button? or any simple way to reload the view controllers that sit inside a tabBarController?

thanks.

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There is a key in your app's Info.plist file called UIApplicationExitsOnSuspend, set it to the boolean YES, which will essentially revert the home button's functionality to pre-iOS4 and completely exit your app when the home button is tapped.

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Try disabling backgrounding. Apple has this in their documentation

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Try to check. UIApplicationExitsOnSuspend

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http://developer.apple.com/iphone/library/documentation/UIKit/Reference/UIApplicationDelegate_Protocol/Reference/Reference.html

you have to look up to the UIApplicationDidBecomeActiveNotification i think, but in the uiapplicationdelegate-protocol, there are even some other interesting things for you

or perfectly for you: UIApplicationWillEnterForegroundNotification as a new notification in ios4 for this problem