title: Status Bar Appears Over My View in IOS 7
body: <p>In my IOS7 app,Status Bar Appears Over My View.After googling I found that I should use </p>
  
  <pre><code>if ([self respondsToSelector:@selector(edgesForExtendedLayout)])
          self.edgesForExtendedLayout = UIRectEdgeNone;
  </code></pre>
  
  <p>in viewDidLoad method and working fine.But I have over 30+ view controllers in my app.Is there any easy way to write the above piece of code in a single place instead of writing it in all classes ?</p>