如何从相机中获取 [UIImage] (AVCaptureSession)答案

【问题标题】：How to get [UIImage] from camera (AVCaptureSession)如何从相机中获取 [UIImage] (AVCaptureSession)
【发布时间】：2021-06-29 07:16:37
【问题描述】：

我正在尝试将从相机获取的 UIImage 添加到 [UIImage]，但是当我使用以下代码时，相机将在添加 12 帧后停止

var temp1:CGImage?

extension VideoCapture: AVCaptureVideoDataOutputSampleBufferDelegate {


    public func captureOutput(_ output: AVCaptureOutput,
                              didOutput sampleBuffer: CMSampleBuffer,
                              from connection: AVCaptureConnection) {
        
       // print(1)
        guard let delegate = self.delegate else { return }
//        print(sampleBuffer.imageBuffer)
        if let pixelBuffer = sampleBuffer.imageBuffer {
            // Attempt to lock the image buffer to gain access to its memory.
            guard CVPixelBufferLockBaseAddress(pixelBuffer, .readOnly) == kCVReturnSuccess
                else {
                    return
            }
            // Create Core Graphics image placeholder.
            var image: CGImage?
            
            
            // Create a Core Graphics bitmap image from the pixel buffer.
            VTCreateCGImageFromCVPixelBuffer(pixelBuffer, options: nil, imageOut: &image)
            DispatchQueue.main.async {
                if image != nil{
                    self.temp.append(image)
                    print(self.temp.count)
                }
                delegate.videoCapture(self, didCaptureFrame: image)
            }

//
            
        }
    }

【问题讨论】：

标签： swift uiimage avcapturesession

【解决方案1】：

如果你使用UIImagePickerController ，你可以使用UIImagePickerControllerDelegate开发

例如


var temp1:UIImage?

extension VideoCapture: UIImagePickerControllerDelegate, UINavigationControllerDelegate {
    
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
        
        if let image = info[UIImagePickerController.InfoKey(rawValue: "UIImagePickerControllerEditedImage")] as? UIImage {
            
            // modified Image
            temp1 = image.convertToGrayScale()
            
        } else if let image = info[UIImagePickerController.InfoKey(rawValue: "UIImagePickerControllerOriginalImage")] as? UIImage {
            
            // original Image
            temp1 = image.convertToGrayScale()
        }
       
        picker.dismiss(animated: true, completion: nil)
        
    }

【讨论】：