Question

Using a navigation based view hierarchy. I have a root view controller, and multiple view controllers that branch out from the same when a button is pressed. When a user presses the back button on the UINavigationBar, the current viewcontroller is popped and the display animates back to the rootviewcontroller.

The problem is, I want the viewcontrollers to UNLOAD whenever they are popped. Seems like they are not unloading because when I go back to them they are still in the state they were when they were popped.

How do I unload the viewcontrollers after navigating back to the rootviewcontroller?

Answer 1

-viewUnload is called after the application receives low-memory notification.

It is the default implementation of -didReceiveMemoryWarning that calls -viewUnload.

What you probably want to do is put what you want to do into -viewDidDisappear based on what you’ve described.