How to add a global right bar button (UINavigationController) in Three20's AppDelegate

Question

I want to add a global right bar button in the global AppDelegate so all my view controllers will have this button automatically.

I added in the AppDelegate

Answer 1

What you need to do is to tap into the navigation controller you wish to hook into. then you can implement UINavigationControllerDelegate (each navigation controller has a delegate property) which will give you these events:

// Called when the navigation controller shows a new top view controller via a push, pop or setting of the view controller stack.
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated;
- (void)navigationController:(UINavigationController *)navigationController didShowViewController:(UIViewController *)viewController animated:(BOOL)animated;

You can implement

- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated;

and put your right button in place.