AVCaptureSession 在 Swift 6 上崩溃

我不确定我的帖子是否完全符合规则，或者是否有人能够克隆该 repo，但我被困住了。

将 Swift 语言版本从 5 更改为 6 并对此处提供的 Apple 示例项目进行一些调整（严格并发）：https ://developer.apple.com/tutorials/sample-apps/capturingphotos-captureandsave ，不幸的是它在打开时崩溃了。

我试图理解为什么会发生这种情况。我注意到，虽然照片库在应用程序中运行良好，但相机会话却不行。我的问题是：有人知道我可能做错了什么吗？有趣的是，如果我恢复到 Swift 5，即使进行了更改也不会发生崩溃。

这里是一些相关的代码片段，我在其中配置捕获会话、启动捕获会话以及处理捕获缓冲区：

class Camera {
    …

    private func configureCaptureSession(completionHandler: (_ success: Bool) -> Void) {
        
        var success = false
        
        self.captureSession.beginConfiguration()
        
        defer {
            self.captureSession.commitConfiguration()
            completionHandler(success)
        }
        
        guard
            let captureDevice = captureDevice,
            let deviceInput = try? AVCaptureDeviceInput(device: captureDevice)
        else {
            logger.error("Failed to obtain video input.")
            return
        }
        
        let photoOutput = AVCapturePhotoOutput()
                        
        captureSession.sessionPreset = AVCaptureSession.Preset.photo

        let videoOutput = AVCaptureVideoDataOutput()
        videoOutput.setSampleBufferDelegate(self, queue: DispatchQueue(label: "VideoDataOutputQueue"))
  
        guard captureSession.canAddInput(deviceInput) else {
            logger.error("Unable to add device input to capture session.")
            return
        }
        guard captureSession.canAddOutput(photoOutput) else {
            logger.error("Unable to add photo output to capture session.")
            return
        }
        guard captureSession.canAddOutput(videoOutput) else {
            logger.error("Unable to add video output to capture session.")
            return
        }
        
        captureSession.addInput(deviceInput)
        captureSession.addOutput(photoOutput)
        captureSession.addOutput(videoOutput)
        
        self.deviceInput = deviceInput
        self.photoOutput = photoOutput
        self.videoOutput = videoOutput
        
        photoOutput.isHighResolutionCaptureEnabled = true
        photoOutput.maxPhotoQualityPrioritization = .quality
        
        updateVideoOutputConnection()
        
        isCaptureSessionConfigured = true
        
        success = true
    }

    …

    func start() async {
        let authorized = await checkAuthorization()
        guard authorized else {
            logger.error("Camera access was not authorized.")
            return
        }
        
        if isCaptureSessionConfigured {
            if !captureSession.isRunning {
                sessionQueue.async { [self] in
                    self.captureSession.startRunning()
                }
            }
            return
        }
        
        sessionQueue.async { [self] in
            self.configureCaptureSession { success in
                guard success else { return }
                self.captureSession.startRunning()
            }
        }
    }
}

extension Camera: @preconcurrency AVCaptureVideoDataOutputSampleBufferDelegate {

    @MainActor    
    func captureOutput(_ output: AVCaptureOutput, didOutput sampleBuffer: CMSampleBuffer, from connection: AVCaptureConnection) {
        guard let pixelBuffer = sampleBuffer.imageBuffer else { return }
        
        guard let device = captureDevice else { return }
        let rotationCoordiantor = AVCaptureDevice.RotationCoordinator(
            device: device,
            previewLayer: nil
        )
        
        if connection.isVideoOrientationSupported {
            connection.videoRotationAngle = rotationCoordiantor.videoRotationAngleForHorizonLevelCapture
        }

        addToPreviewStream?(CIImage(cvPixelBuffer: pixelBuffer))
    }
}

如果有人愿意看一看，我准备了一个包含两个提交的仓库。在初始提交中，我以 1 对 1 的方式添加了 Apple 的示例代码，在“Swift 6 更新”提交中，我做了一些调整以消除编译器错误。但是，我不确定我是否做对了。

仓库链接：https://github.com/miltenkot/CapturingPhotosSwift6

附言：要检查相机会话，您需要在真实设备上打开此示例，因为在模拟器上您只能打开库并且不会崩溃