Checking if a UIViewController is about to get Popped from a navigation stack?

iphone objective-c uikit uiviewcontroller uinavigationbar
Jasarien picture Jasarien · Mar 13, 2009 · Viewed 37.4k times · Source

I need to know when my view controller is about to get popped from a nav stack so I can perform an action.

I can't use -viewWillDisappear, because that gets called when the view controller is moved off screen for ANY reason (like a new view controller being pushed on top).

I specifically need to know when the controller is about to be popped itself.

Any ideas would be awesome, thanks in advance.

Answer

Jeff Marino picture Jeff Marino · Mar 7, 2012

Override the viewWillDisappear method in the presented VC, then check the isMovingFromParentViewController flag within the override and do specific logic. In my case I'm hiding the navigation controllers toolbar. Still requires that your presented VC understand that it was pushed though so not perfect.

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