示例AVCAM – Swift Xcode v9

@objc func didTapCameraView() {
    self.cameraView.isUserInteractionEnabled = false
    self.spinner.isHidden = false
    self.spinner.startAnimaTing()

    let setTings = AVCapturePhotoSetTings()
    let previewPixelType = setTings.availablePreviewPhotoPixelFormatTypes.first!
    let previewFormat = [kCVPixelBufferPixelFormatTypeKey as String: previewPixelType,kCVPixelBufferWidthKey as String: 160,kCVPixelBufferHeightKey as String: 160]

    setTings.previewPhotoFormat = previewFormat

    if flashControlState == .off {
        setTings.flashMode = .off
    } else {
        setTings.flashMode = .on
    }
    cameraOutput.capturePhoto(with: setTings,delegate: self)
}

当我使用Xcode 9 swift 4运行应用程序时,我收到此错误