title: Change status bar colours in MFMailComposeViewController through UIActivityViewController
body: <p>I am trying to change the colour of the navigation bar buttons, navigation bar tint colour and text colour, however I don't seem to be getting anywhere. The <code>MFMailComposeViewController</code> is being activated via a <code>UIActivityViewController</code> and I have tried a few different methods that have worked before (not through a <code>UIActivityViewController</code> though).</p>
  
  <p>This is my current code:</p>
  
  <pre><code>    UINavigationBar.my_appearanceWhenContainedIn(MFMailComposeViewController).barTintColor = UIColor.blackColor()
  </code></pre>
  
  <p>This was suggested <a href="https://stackoverflow.com/questions/24136874/appearancewhencontainedin-in-swift">here</a>. I have also tried this:</p>
  
  <pre><code>    activityVC.navigationController?.navigationBar.tintColor = UIColorFromRGB(0x0096FF)
      activityVC.navigationController?.navigationBar.barTintColor = UIColor.whiteColor()
  </code></pre>
  
  <p>I'm also looking to change the status bar colour.</p>
  
  <p>Anyone have any ideas?</p>
  
  <p><strong>UPDATE:</strong></p>
  
  <p>I fixed the navigation bar issues for the buttons and title, but still looking for a solution to the status bar. Doing this doesn't work:</p>
  
  <pre><code>    self.presentViewController(activityVC, animated: true, completion: { () in
          UIApplication.sharedApplication().setStatusBarStyle(UIStatusBarStyle.LightContent, animated: true)
      })
  </code></pre>