title: Customizing UINavigationBar as in Fox news iPhone app
body: <p>How can the UINavigationBar customizations be done? Is it using subclassing or categories?</p>
  
  <p><img src="https://i.stack.imgur.com/1DNkq.png" alt="Fox news iphone app"></p>
  
  <p>I am interested in 2 aspects:</p>
  
  <ol>
  <li>Adding an image to the NavBar (like the FOXNEWS logo)</li>
  <li>Customizing the back button to "Shows". (the back button usually takes the title of the previous view in the stack, but there is no title in previous view.)</li>
  </ol>
  
  <p>Thanks in advance for any help  </p>