Question

Using a UINavigationViewController, how do I find out how a view has appeared?

The view has either appeared in a straightforward manner, as the first view in the UINavigationController stack. Or it has appeared because a second view has been popped and the first view has revealed itself again. How do you find out which of these happened?

Answer 1

The only reliable way to do this, as far as I’m aware, is to subclass UINavigationController and override the UINavigationBarDelegate methods:

– navigationBar:shouldPushItem:
– navigationBar:didPushItem:
– navigationBar:shouldPopItem:
– navigationBar:didPopItem:

Don’t forget to call super, of course.