title: IOS 7 hide tabbar issue
body: <p>Hide tabbar in IOS7 shows informal behaviour</p>
  
  <p>When I use</p>
  
  <pre><code>self.tabBarController.tabBar.hidden = YES;
  </code></pre>
  
  <p>Above code hides the tabBar, but my view from bottom does not remain interactive</p>
  
  <p>But when I uses this just before pushing viewController in navigation</p>
  
  <pre><code>someViewController.hidesBottomBarWhenPushed = YES
  [self.navigationController pushViewController:someViewController animated:YES];
  </code></pre>
  
  <p>It hides tabbar as well as view from bottom is also interactive.
  but problem in this case is, when we pop viewController it shows black bar just above tabbar for few seconds.</p>