title: UIImage imageNamed requires pathForResource?
body: <p>How necessary is it to search for a path to an image using the <code>NSBundle</code> method <code>pathForResource</code> when creating a <code>UIImage</code> using <code>imageNamed</code>? I see tutorial codes that just specifies the name of the image directly, and then code that goes the extra mile to find the path first.</p>
  
  <p>In my experience, I've always just used the name directly and it's always worked fine. I assumed that it automatically knew how to find the image. How important or under what circumstances would it be necessary to do more than this?</p>