title: UIBarButtonItem is disabled, but has normal color
body: <p>I'm having an issue with a <code>UIBarButtonItem</code>. I use the appearance proxy to set its color for states <code>Normal</code> and <code>Disabled</code> and I do this in the <code>viewDidLoad</code> method of the <code>UIViewController</code>. However, the button gets the <code>Normal</code> color, even when it is disabled (and it is definitely disabled because the <code>IBAction</code> method is not being called).</p>
  
  <p>The question is similar to this one <a href="https://stackoverflow.com/questions/22550045/text-color-of-disabled-uibarbuttonitem-is-always-the-color-of-the-normal-state">text color of disabled uibarbuttonitem is always the color of the normal state</a>, however, the solution posted here does not work for me.</p>
  
  <p>My app is for iOS 8.2 and I'm using Xcode 6.2</p>
  
  <p>Any ideas?</p>
  
  <p><strong>EDIT</strong>:
  I am not sure if this is helpful for finding the solution, but when I create my button using <code>initWithImage:</code> instead of <code>initWithTitle:</code> everything seems to be working well. Could this be an Apple bug?</p>