使用自定义相机拍照 iOS 11.0 Swift 4.更新错误

Question

我的应用程序中有一个自定义相机，它工作正常，但在新更新后我收到此错误：

'jpegPhotoDataRepresentation(forJPEGSampleBuffer:previewPhotoSampleBuffer:)' was deprecated in iOS 11.0: Use -[AVCapturePhoto fileDataRepresentation] instead.

这是我遇到错误的行：

    guard let imageData =
        AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: photoSampleBuffer, previewPhotoSampleBuffer: previewPhotoSampleBuffer) else {
            return
    }

这是我的全部功能（如果需要的话）：

//Take pic function
func photoOutput(_ captureOutput: AVCapturePhotoOutput,
                 didFinishProcessingPhoto photoSampleBuffer: CMSampleBuffer?,
                 previewPhoto previewPhotoSampleBuffer: CMSampleBuffer?,
                 resolvedSettings: AVCaptureResolvedPhotoSettings,
                 bracketSettings: AVCaptureBracketedStillImageSettings?,
                 error: Error?) {


    // Make sure we get some photo sample buffer
    guard error == nil,
        let photoSampleBuffer = photoSampleBuffer else {
            print("Error capturing photo: \(String(describing: error))")
            return
    }
    // Convert photo same buffer to a jpeg image data by using // AVCapturePhotoOutput
    guard let imageData =
        AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: photoSampleBuffer, previewPhotoSampleBuffer: previewPhotoSampleBuffer) else {
            return
    }

    let dataProvider = CGDataProvider(data: imageData as CFData)

    let cgImageRef = CGImage(jpegDataProviderSource: dataProvider!, decode: nil, shouldInterpolate: true, intent: CGColorRenderingIntent.absoluteColorimetric)


    let image = UIImage(cgImage: cgImageRef!, scale: 1.0, orientation: UIImageOrientation.right)

    self.tempImageView.image = image

}

我的建议是：我应该用什么来让它工作？

谢谢。

Answer 1

在iOS11中，你应该这样使用：

@available(iOS 11.0, *)
func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
        let imageData = photo.fileDataRepresentation()
}

Answer 2

感谢@Vini App，我尝试了适合我的代码，我发布了我的图像捕获和处理代码，希望能帮助那些在他们的应用程序中需要类似功能的人。

首先你需要设置你的视频捕获设备，搜索它google这里有一个例子https://gist.github.com/tad-iizuka/fc35bc7835920c0b8b84e316f83e3a40

确保您需要在顶部定义 photoSetting

...
var photoSetting = AVCapturePhotoSettings()
...

在 viewDidLoad() 或 viewWillAppear()

中配置照片设置

            // Configure camera
        photoSetting = AVCapturePhotoSettings.init(format: [AVVideoCodecKey: AVVideoCodecType.jpeg])
        photoSetting.isAutoStillImageStabilizationEnabled = true
        photoSetting.flashMode = .off

然后使用以下函数处理缓冲图像数据

     func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {

    // Check if there is any error in capturing
    guard error == nil else {
        print("Fail to capture photo: \(String(describing: error))")
        return
    }

    // Check if the pixel buffer could be converted to image data
    guard let imageData = photo.fileDataRepresentation() else {
        print("Fail to convert pixel buffer")
        return
    }

    // Check if UIImage could be initialized with image data
    guard let capturedImage = UIImage.init(data: imageData , scale: 1.0) else {
        print("Fail to convert image data to UIImage")
        return
    }

    // Get original image width/height
    let imgWidth = capturedImage.size.width
    let imgHeight = capturedImage.size.height
    // Get origin of cropped image
    let imgOrigin = CGPoint(x: (imgWidth - imgHeight)/2, y: (imgHeight - imgHeight)/2)
    // Get size of cropped iamge
    let imgSize = CGSize(width: imgHeight, height: imgHeight)

    // Check if image could be cropped successfully
    guard let imageRef = capturedImage.cgImage?.cropping(to: CGRect(origin: imgOrigin, size: imgSize)) else {
        print("Fail to crop image")
        return
    }

    // Convert cropped image ref to UIImage
    imageToSave = UIImage(cgImage: imageRef, scale: 1.0, orientation: .down)
    UIImageWriteToSavedPhotosAlbum(imageToSave, nil, nil, nil)

    // Stop video capturing session (Freeze preview)
    captureSession.stopRunning()
}

在这个函数中，像素缓冲区被转换成photoSetting指定格式的图像数据，然后裁剪成你想要的大小。

您可以在IB中创建一个按钮来调用上面的捕获函数

@IBAction func onTakePhoto(_ sender: UIButton) {
    if let videoConnection = videoOutput.connection(with: AVMediaType.video) {
        // Adjust the orientaion of captured image
        let capturePhotoSetting = AVCapturePhotoSettings.init(from: photoSetting)
        videoConnection.videoOrientation = (previewLayer.connection?.videoOrientation)!
        // Save captured photo to system album
        self.videoOutput.capturePhoto(with: capturePhotoSetting, delegate: self)
    }
}

Answer 3

对于 iOS 11.0 及更低版本我都处理过

var photoOutput : AVCapturePhotoOutput?

if #available(iOS 11.0, *)
{
                    photoOutput?.setPreparedPhotoSettingsArray([AVCapturePhotoSettings(format:[AVVideoCodecKey:AVVideoCodecType.jpeg])], completionHandler: nil)
} 

else
{
                    photoOutput?.setPreparedPhotoSettingsArray([AVCapturePhotoSettings(format:[AVVideoCodecKey:AVVideoCodecJPEG])], completionHandler: nil)
}

Answer 4

使用此代码 (Swift 5)，对我来说效果很好。

func photoOutput(_ output: AVCapturePhotoOutput, didFinishProcessingPhoto photo: AVCapturePhoto, error: Error?) {
    guard let imageData = photo.fileDataRepresentation() else { return }
    let previewImage = UIImage(data: imageData)
}

使用自定义相机拍照 iOS 11.0 Swift 4.更新错误

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