title: UINavigationBar multi-line title
body: <p>Is there a straightforward way of overriding the titleView of the current navigation bar item in a navigation bar within a navigation controller? I've tried creating a new UIView and replacing the titleView property of topView with my own UIVIew with no success.</p>
  
  <p>Basically, I want a multi-line title for the navigation bar title. Any suggestions?</p>