title: iOS rightBarButtonItem on UINavigationController in swift
body: <p>I'm trying to put a <code>rightBarButtonItem</code> on a second view controller of an <code>UINavigationViewController</code> stack.</p>
  
  <p>I'm creating and setting the button in <code>viewDidLoad</code> of the view controller that I want to show. My actual code looks like this:</p>
  
  <pre><code>override func viewDidLoad() {
      super.viewDidLoad()
      menu_button_ = UIBarButtonItem(image: UIImage(named: "menu"),
          style: UIBarButtonItemStyle.Plain ,
          target: self, action: "OnMenuClicked:")
  
      self.navigationController!.navigationItem.rightBarButtonItem = menu_button_
  }
  </code></pre>
  
  <p>What am I missing? The button doesn't appear.</p>