title: Unable to set a UIBarbutton back to the default tint color
body: <p>If I change the tint of a UIBarbutton how can I reset it to it's default tint.</p>
  
  <p>Here I am set a custom tint for a button...</p>
  
  <pre><code>examCancelButton.style = UIBarButtonSystemItemCancel;
  examCancelButton.tintColor = myRedButtonTint;
  </code></pre>
  
  <p>Then later I need to set it back to it's default style and tint. So I thought just setting the style to UIBarButtonItemStyleDone would do the trick like this...</p>
  
  <pre><code>examCancelButton.style = UIBarButtonItemStyleDone;
  </code></pre>
  
  <p>But the color remains red. I can set it to a nice blue color on my own, but I would like to get the default color of a UIBarButtonItemStyleDone button. Is this possible?</p>
  
  <p>Thanks, John</p>