小编Itu*_*ote的帖子

开始使用前置摄像头玩MLKit面部检测器，但是在处理面部时确实很慢

func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {

    print("Picture at ", Date())


    let visionImage = VisionImage(buffer: sampleBuffer)
    visionImage.metadata = metadata


    faceDetector?.detect(in: visionImage) { (faces, error) in
        guard error == nil, let faces = faces, !faces.isEmpty else {
            // Error. You should also check the console for error messages.
            let errorString = error?.localizedDescription
            print("Face detection failed with error: \(errorString)")
            return
        }

  }

我要去哪里错了？