title: CALayer - Place sublayer below storyboard UIButtons?
body: <p>I've got a view controller in my storyboard with several UIButtons. One of them activates an AVFoundation camera preview layer shown in a sublayer:</p>
  
  <pre><code>captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc] initWithSession:session];
  captureVideoPreviewLayer.frame = self.view.bounds;
  [self.view.layer addSublayer:captureVideoPreviewLayer];
  </code></pre>
  
  <p>This works correctly except for the fact that the preview layer is rendered on top of my buttons so even though the buttons are still clickable they are not able to be seen by the user. Is there an easy way to place the sublayer below the buttons? Or an easy way to raise the buttons up in the layer? Thank you much!</p>