title: How to add a global right bar button (UINavigationController) in Three20's AppDelegate
body: <p>I want to add a global right bar button in the global AppDelegate so all my view controllers will have this button automatically.</p>
  
  <p>I added in the AppDelegate</p>
  
  <pre><code>navigator.window.rootViewController.navigationController.navigationItem.rightBarButtonItem     
  = [[[UIBarButtonItem alloc] initWithTitle:NSLocalizedString(@"Test", @"") 
  style:UIBarButtonItemStyleBordered target:self action:@selector(showTest)] autorelease]; 
  </code></pre>
  
  <p>Of course the above code is not working..any problem with the code above?</p>