title: setting tint color for navigation bars reverts back to iOS 6 blue color
body: <p>I have an iOS 6 application that sets the tint color for all navigation bar buttons to a green color by using the following:</p>
  
  <pre><code>[[UIBarButtonItem appearance] setTintColor:[UIColor colorWithRed:(100.0f/255.0f) green:(190.0f/255.0f) blue:(100.0f/255.0f) alpha:1.0f]];
  </code></pre>
  
  <p>This is done at the launch of the application. This works fine on phones running iOS 6 but on phones running iOS 7 the tint color is sometimes there and and sometimes not. It especially happens when an AlertView is displayed. This wipes out the tint color of any buttons displaying the correct green tint and reverts the buttons back to the standard iOS 6 blue tint.</p>
  
  <p>To confirm it isn't something I'm doing in my larger project, I have created a basic template Master-detail xcode project to confirm and only added the above line and an alertview popup and this happens there as well.</p>
  
  <p>I am wondering if 1.) anyone else is experiencing this 2.) if so, have you found a work-around and 3.) anyone know if Apple has confirmed this as a bug.</p>
  
  <p>At this time we are not looking to convert this app to the iOS 7 look-and-feel so that is not an option. Thx.</p>