title: Navigation bar (iphone)
body: <p>I have created email functionality view in which everything is working fine, but the color of a navigation bar item is not changing like other views. I have used below code for navigation color but 1 navigation bar button item is left with default color. How do I change it?</p>
  
  <pre><code>controller.navigationBar.barStyle = UIBarStyleBlack;</code></pre>