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I have a UITabBarController which is the second item inside a UINavigationController.
Each item within the UITabBarController is a sub class of UIViewController. How can I create a button that appears at the top right of the navigationBar and changes depending on which tab is selected.
I am using storyboards, just in case there is a gui way of achieving this.
Implement the UITabBarControllerDelegate method tabBarController:didSelectViewController: and then depending on what view controller was selected set the rightBarButtonItem of your UINavigationController to show whatever you want it to show.