title: iOS tab bar controller adding a navigation button at the top of the controller
body: <p>So I have a <code>UITabBarController</code> and it has three buttons on the bottom in my iOS app. I want to add another set of buttons at the top but not quite sure on how to do this. I tried adding a <code>UINavigationBar</code> and a navigation button, and adding a view in to it, adding just the buttons, ect.... but to no avail. It won't let me add anything to the <code>UITabBarController</code>. Is there a way to do this?
  Thank you very much.</p>
  
  <p><a href="https://i.stack.imgur.com/BTfkO.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/BTfkO.png" alt="StoryBoard"></a></p>