如何使用AVCapturePhotoOutput [英] How to use AVCapturePhotoOutput

问题描述

我一直在使用自定义的相机，我最近升级到Xcode 8测试版和Swift 3.我原来有这样：

  var stillImageOutput：AVCaptureStillImageOutput？但是，我现在得到的警告：
 
 
 
 
'AVCaptureStillImageOutput'已在iOS 10.0中弃用：使用AVCapturePhotoOutput代替
 
 
 ，我没有看到太多的信息。这是我当前的代码：
  var captureSession：AVCaptureSession？ 
 var stillImageOutput：AVCaptureStillImageOutput？ 
 var previewLayer：AVCaptureVideoPreviewLayer？ 
 
 func clickPicture（）{
 
 if let videoConnection = stillImageOutput？.connection（withMediaType：AVMediaTypeVideo）{
 
 videoConnection.videoOrientation = .portrait 
 stillImageOutput？.captureStillImageAsynchronously（from：videoConnection，completionHandler：{（sampleBuffer，error） - > Void in 
 
 if sampleBuffer！= nil {
 
 let imageData = AVCaptureStillImageOutput.jpegStillImageOutput.jpegStillImageNSDataRepresentation（sampleBuffer）
 let dataProvider = CGDataProvider（data：imageData！）
让cgImageRef = CGImage（jpegDataProviderSource：dataProvider !, decode：nil，shouldInterpolate：true，intent：.defaultIntent）
 
 let image = UIImage（cgImage：cgImageRef !, scale：1，orientation：.right）
 
} 
 
}）
 $ b b} 
 
} 
  
 
 
我试着看看 AVCapturePhotoCaptureDelegate ，但我不太确定如何使用它。有人知道如何使用这个吗？谢谢。
解决方案
 Hi很容易使用 AVCapturePhotoOutput  p> 
 
 
您需要返回 CMSampleBuffer 的 AVCapturePhotoCaptureDelegate  p> 
 
 
如果你告诉 AVCapturePhotoSettings  previewFormat 
 
 
  class CameraCaptureOutput：NSObject，AVCapturePhotoCaptureDelegate {
 
 let cameraOutput = AVCapturePhotoOutput（）
 
 func capturePhoto b 
 $ b让settings = AVCapturePhotoSettings（）
让previewPixelType = settings.availablePreviewPhotoPixelFormatTypes.first！ 
 let previewFormat = [kCVPixelBufferPixelFormatTypeKey as String：previewPixelType，
 kCVPixelBufferWidthKey as String：160，
 kCVPixelBufferHeightKey as String：160，
] 
 settings.previewPhotoFormat = previewFormat 
 self.cameraOutput.capturePhoto（with：settings，delegate：self）
 
} 
 func capture（_ captureOutput：AVCapturePhotoOutput，didFinishProcessingPhotoSampleBuffer photoSampleBuffer：CMSampleBuffer ?, previewPhotoSampleBuffer：CMSampleBuffer ?, resolvedSettings： AVCaptureResolvedPhotoSettings，bracketSettings：AVCaptureBracketedStillImageSettings ?,错误：NSError？）{
 
如果let error = error {
 print（error.localizedDescription）
} 
 
 if let sampleBuffer = photoSampleBuffer，let previewBuffer = previewPhotoSampleBuffer，let dataImage = AVCapturePhotoOutput.jpegPhotoDataRepresentation（forJPEGSampleBuffer：sampleBuffer，previewPhotoSampleBuffer：previewBuffer）{
 print（image：UIImage（data：dataImage）.size）
} else {
 
} 
 
} 
 
} 
  

有关详细信息，请访问 https://developer.apple.com/reference/AVFoundation/AVCapturePhotoOutput

I have been working on using a custom camera, and I recently upgraded to Xcode 8 beta along with Swift 3. I originally had this:

var stillImageOutput: AVCaptureStillImageOutput?

However, I am now getting the warning:

'AVCaptureStillImageOutput' was deprecated in iOS 10.0: Use AVCapturePhotoOutput instead

As this is fairly new, I have not seen much information on this. Here is my current code:

var captureSession: AVCaptureSession?
var stillImageOutput: AVCaptureStillImageOutput?
var previewLayer: AVCaptureVideoPreviewLayer?

func clickPicture() {

    if let videoConnection = stillImageOutput?.connection(withMediaType: AVMediaTypeVideo) {

        videoConnection.videoOrientation = .portrait
        stillImageOutput?.captureStillImageAsynchronously(from: videoConnection, completionHandler: { (sampleBuffer, error) -> Void in

            if sampleBuffer != nil {

                let imageData = AVCaptureStillImageOutput.jpegStillImageNSDataRepresentation(sampleBuffer)
                let dataProvider = CGDataProvider(data: imageData!)
                let cgImageRef = CGImage(jpegDataProviderSource: dataProvider!, decode: nil, shouldInterpolate: true, intent: .defaultIntent)

                let image = UIImage(cgImage: cgImageRef!, scale: 1, orientation: .right)

            }

        })

    }

}

I have tried to look at AVCapturePhotoCaptureDelegate, but I am not quite sure how to use it. Does anybody know how to use this? Thanks.

解决方案

Hi it's really easy to use AVCapturePhotoOutput.

You need the AVCapturePhotoCaptureDelegate which returns the CMSampleBuffer.

You can get as well a preview image if you tell the AVCapturePhotoSettings the previewFormat

class CameraCaptureOutput: NSObject, AVCapturePhotoCaptureDelegate {

    let cameraOutput = AVCapturePhotoOutput()

    func capturePhoto() {

      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
            self.cameraOutput.capturePhoto(with: settings, delegate: self)

}
    func capture(_ captureOutput: AVCapturePhotoOutput, didFinishProcessingPhotoSampleBuffer photoSampleBuffer: CMSampleBuffer?, previewPhotoSampleBuffer: CMSampleBuffer?, resolvedSettings: AVCaptureResolvedPhotoSettings, bracketSettings: AVCaptureBracketedStillImageSettings?, error: NSError?) {

        if let error = error {
            print(error.localizedDescription)
        }

        if let sampleBuffer = photoSampleBuffer, let previewBuffer = previewPhotoSampleBuffer, let dataImage = AVCapturePhotoOutput.jpegPhotoDataRepresentation(forJPEGSampleBuffer: sampleBuffer, previewPhotoSampleBuffer: previewBuffer) {
          print(image: UIImage(data: dataImage).size)
        } else {

        }

    }

}

For more information visit https://developer.apple.com/reference/AVFoundation/AVCapturePhotoOutput

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