title: iOS7 QLPreviewController change navigation bar color?
body: <p>How can i set the translucent property in QLPreviewController i have tried the below code but its not working</p>
  
  <pre><code>  QLPreviewController *previewer = [[QLPreviewController alloc] init];
  // Set data source
  [previewer setDataSource:self];
  [previewer setDelegate:self];
  previewer.edgesForExtendedLayout = UIRectEdgeNone;
  [previewer setCurrentPreviewItemIndex:index];
  [self.navigationController.navigationBar setTranslucent:NO];
  [self.navigationController setToolbarHidden:NO];
  [[self navigationController] pushViewController:previewer animated:YES];
  </code></pre>
  
  <p>Thanks</p>