title: Use Background Image to UINavigationController among multiple views
body: <p>How can I use a background image for UINavigationController, while maintaining the title? The answer from <a href="https://stackoverflow.com/questions/289441/uinavigationcontroller-title-can-be-some-image/428434#428434">ck</a> on other thread did the trick to put the image and keep the text. But if the user navigates to other view ( using [navigationController pushViewController]), only the background appears in the new screen.</p>
  
  <p>How can one change the background image for UINavigationController, while maintaining the title across multiple views?</p>