title: statusBar for iOS7 in Xcode 4.6
body: <p>I want to resolve issue with <code>statusBar</code> in iOS7. I have found <a href="https://stackoverflow.com/questions/17678881/how-to-change-status-bar-text-color-in-ios-7">this post</a> and this solution works great in Xcode 5. But when I tried this code in Xcode 4.6.3 I got 2 errors:</p>
  
  <ol>
  <li><code>No visible @interface for 'MyController' declares the selector
  'setNeedsStatusBarAppearanceUpdate'</code>;</li>
  <li><code>Use of undeclared identifier
  'UIStatusBarStyleLightContent'</code>.</li>
  </ol>
  
  <p>The first problem was solved by using this code: <code>[self performSelector:@selector(setNeedsStatusBarAppearanceUpdate)];</code> but I can't resolve the second  error.</p>