使用SwiftUI和AVFoundation捕获视频

import AVFoundation

AVCaptureDevice.requestAccess(for: .video) { granted in
    if granted {
        // 用户已授权访问摄像头
    } else {
        // 用户未授权访问摄像头
    }
}

AVCaptureDevice.requestAccess(for: .audio) { granted in
    if granted {
        // 用户已授权访问麦克风
    } else {
        // 用户未授权访问麦克风
    }
}

let session = AVCaptureSession()

guard let videoDevice = AVCaptureDevice.default(for: .video) else {
    // 无法获取摄像头设备
    return
}

guard let videoInput = try? AVCaptureDeviceInput(device: videoDevice) else {
    // 创建视频输入失败
    return
}

session.addInput(videoInput)

let output = AVCaptureMovieFileOutput()

if session.canAddOutput(output) {
    session.addOutput(output)
}

let previewLayer = AVCaptureVideoPreviewLayer(session: session)

// 设置预览图层的大小和位置
previewLayer.frame = view.bounds

// 将预览图层添加到界面的图层中
view.layer.addSublayer(previewLayer)

session.startRunning()

let outputFileURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("video.mov")
output.startRecording(to: outputFileURL, recordingDelegate: self)