@available(iOS 11.0, *)
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
let imageData = photo.fileDataRepresentation()
let previewImage = UIImage(data: imageData!)
let containerView = PreviewPhotoContainerView()
containerView.previewImageView.image = previewImage
view.addSubview(containerView)
containerView.anchor(top: view.topAnchor, leading: view.leadingAnchor, bottom: view.bottomAnchor, trailing: view.trailingAnchor, paddingTop: 0, paddingLeading: 0, paddingBottom: 0, paddingTrailing: 0, width: 0, height: 0)
let previewImageView = UIImageView(image: previewImage)
}