title: Customize specific UIBarButtonItem in Storyboard on iOS 7
body: <p>For my iOS 7 app, I have a UIToolbar holding a set of UIBarButtonItems, and for a particular item I want to have a customized appearance.</p>
  
  <p>I would like to just drop the item on the storyboard, and specify its class, without acting on the UIToolbar via code. One option is to use appearance, but unfortunately it results in altering all UIBarBUttonItem.</p>
  
  <p>Some old SO post suggest to subclass UIBarButtonItem and use drawRect, and this would be the ideal solution, but unfortunately such method seems to be not getting called at all.</p>