isBeingDismissed not set in viewWillDisappear:

Question

I have some code to clean up in my viewWillDisappear:, which I only want to use when the view is moving back to the parent view controller.

- (void)         


        

Answer 1

As @Yuval Tal mentioned, this flag does not work when you're dismissing controller that is embeded inside navigation controller. Here's an extension that I use:

extension UIViewController 
{
    var isAboutToClose: Bool {
        return self.isBeingDismissed ||      
               self.isMovingFromParentViewController ||          
               self.navigationController?.isBeingDismissed ?? false
    }
}

It can be easily extended when you find another case when standard .isBeingDismissed won't work. And if you find, let us, let me know in comments.