title: How to change the bottom toolbar tint color without changing the navigator bar tint?
body: <p>I want to set the navigator bar tint to white  but the bottom tool bar tint to red. </p>
  
  <p>The navigator bar tint is set at storyboard, and the tool bar tint is set in code.</p>
  
  <p><code>self.navigationController?.toolbar.tintColor=UIColor.redColor()</code>        </p>
  
  <p>But the code dose not work.</p>