How to avoid shutter sound struggling during capturing still image with `AVCaptureStillImageOutput`?

I'm capturing image with AVCaptureStillImage开发者_Python百科Output. All done fine. But I tried to navigate into new view controller, the shuttering sound struggles. Any workaround to avoid this?

Try to set output to AVCaptureVideoDataOutput (not AVCaptureStillImageOutput) and capture single frame from the video output.