title: iOS 7 UIImagePickerController with Overlay - retake and use photo not usable
body: <p>Even though I set userInteractionsEnabled to NO and my overlayframe is cleary not overlapping the buttons, I cannot click them.</p>
  
  <p><img src="https://i.stack.imgur.com/yrqsp.jpg" alt="Screenshot"></p>
  
  <p>Code:</p>
  
  <pre><code>    // Init Picker
      UIImagePickerController* picker = [[UIImagePickerController alloc] init];
  
      //Create camera overlay for square pictures
      CGFloat navigationBarHeight = picker.navigationBar.bounds.size.height + 25;
      CGFloat height = picker.view.bounds.size.height - 2 * navigationBarHeight;
      CGFloat width = picker.view.bounds.size.width;
      CGRect f = CGRectMake(0, navigationBarHeight, width, height);
      CGFloat barHeight = (f.size.height - f.size.width) / 2;
      UIGraphicsBeginImageContext(f.size);
      [[UIColor colorWithRed:0 green:0 blue:0 alpha:0.7] set];
      UIRectFillUsingBlendMode(CGRectMake(0, 0, f.size.width, barHeight), kCGBlendModeNormal);
      UIRectFillUsingBlendMode(CGRectMake(0, f.size.height - barHeight, f.size.width, barHeight - 4), kCGBlendModeNormal);
      UIImage *overlayImage = UIGraphicsGetImageFromCurrentImageContext();
      UIGraphicsEndImageContext();
      UIImageView *overlayIV = [[UIImageView alloc] initWithFrame:f];
  
      // Disable all user interaction on overlay
      [overlayIV setUserInteractionEnabled:NO];
      [overlayIV setExclusiveTouch:NO];
      [overlayIV setMultipleTouchEnabled:NO];
  
      // Map generated image to overlay
      overlayIV.image = overlayImage;
  
      // Present Picker
      picker.modalPresentationStyle = UIModalPresentationCurrentContext;
      picker.delegate = self;
      picker.sourceType = UIImagePickerControllerSourceTypeCamera;
      if([UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceFront]) {
          picker.cameraDevice = UIImagePickerControllerCameraDeviceFront;
      }
      [picker.cameraOverlayView addSubview:overlayIV];
  
      [self presentViewController:picker animated:YES completion:nil];
  </code></pre>
  
  <p>Any ideas?</p>