How to turn off the shutter sound when capture? AVFoundation

How to turn off the shutter sound when capture? AVFoundation.swift

class PhotoCapture {
  // here some stuff for capture image, such as capture session, configurations, photo output
  // More detail : https://github.com/trilliwon/ArtCamera/blob/master/Camera/Controllers/PhotoCapture.swift
}
// MARK: - AVCapturePhotoCaptureDelegate
extension PhotoCapture: AVCapturePhotoCaptureDelegate {
  func photoOutput(_ output: AVCapturePhotoOutput, willCapturePhotoFor resolvedSettings: AVCaptureResolvedPhotoSettings) {
    AudioServicesDisposeSystemSoundID(1108)
  }

  func photoOutput(_ output: AVCapturePhotoOutput, didCapturePhotoFor resolvedSettings: AVCaptureResolvedPhotoSettings) {
    AudioServicesDisposeSystemSoundID(1108)
  }
}