My application uses a UITabViewController as the root controller with 4 buttons. Part of the app consists of educational content which I am writing in HTML. I would like to maximize screen real-estate by removing the tab-bar. So what I would like to do is to use a UINavigationBarController with a UIWebView. I want a back button so the user can go back to exactly where he was before launching this web tool, which will be launched from a help button from a view underneath the tab bar controller. I am not sure how to do this.