title: Change navigation bar tint color iOS 7.
body: <p>I know how to change navigation bat tint colour in iOS 6:</p>
  
  <pre><code>[UINavigationBar appearance].tintColor = [UIColor colorWithRed:129/255.0 green:200/255.0 blue:244/255.0 alpha:1.0];
  </code></pre>
  
  <p>I'm adding this code in APPDelegate page.
  Now I want to do this in iOS 7 but above code is not working.
  I searched on net. I got a solution. By adding below function to every page I can change navigation color.</p>
  
  <pre><code>self.navigationController.navigationBar.barTintColor = [UIColor colorWithRed:129/255.0 green:200/255.0 blue:244/255.0 alpha:1.0];
  </code></pre>
  
  <p>But I need a function which can add to APPDelegate function.
  Please help me to overcome this issue.</p>