title: UINavigationBar custom background image
body: <p>I used these <a href="https://stackoverflow.com/questions/704558/custom-uinavigationbar-background">suggested solutions</a> to give my UINavigationBar a custom image. (To make it more explicit: I added a category to UINavigationBar in my AppDelegate.m file).
  This worked fine so far and I didn't have any problems. Now however, I was running my app on the recent iOS5 beta. The UINavigationBar is blank now again.</p>
  
  <p>Since all the other apps I have installed, that use a custom image, still behave the same there must be something "wrong" in my code I guess, that iOS5 now doesn't support anymore.</p>
  
  <p>So does anybody have an idea what could be the problem with my adoption of the above mentioned solutions?</p>
  
  <p>The only way I found to make it work was to create a real subclass of UINavigationBar and then in all the views tell IB to use that custom class. Not as elegant, though...</p>