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

Question

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

Answer 1

I tried this:

- (void) viewWillDisappear:(BOOL)animated {
    // If we are disappearing because we were removed from navigation stack
    if (self.navigationController == nil) {
        // YOUR CODE HERE
    }

    [super viewWillDisappear:animated];
}

The idea is that at popping, the view controller's navigationController is set to nil. So if the view was to disappear, and it longer has a navigationController, I concluded it was popped. (might not work in other scenarios).

Can't vouch that viewWillDisappear will be called upon popping, as it is not mentioned in the docs. I tried it when the view was top view, and below top view - and it worked in both.

Good luck, Oded.