title: iOS Swift camera mode- how to indicate photo is captured
body: <p>In Camera mode (AVCaptureVideoPreviewLayer) I manage to capture a photo successfully. I would like to indicate this fact to the user- meaning to show him a sudden black flash and a click sound- similar to what he would experience when taking a photo himself.</p>
  
  <p>How do I do that? Is there some built in functionality that does that?</p>
  
  <p>Thanks</p>