SwiftUI -如何处理摄像头权限？

import SwiftUI
import AVFoundation

struct ContentView: View {
    @State private var cameraPermissionStatus: AVAuthorizationStatus = .notDetermined
    
    var body: some View {
        VStack {
            if cameraPermissionStatus == .authorized {
                Text("Camera access granted!")
                    .padding()
            } else {
                requestCameraPermission()
            }
        }
        .onAppear {
            checkCameraPermission()
        }
    }
    
    func checkCameraPermission() {
        cameraPermissionStatus = AVCaptureDevice.authorizationStatus(for: .video)
    }
    
    func requestCameraPermission() {
        AVCaptureDevice.requestAccess(for: .video) { granted in
            DispatchQueue.main.async {
                self.cameraPermissionStatus = granted ? .authorized : .denied
            }
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

func openSettings() {
    if let url = URL(string: UIApplication.openSettingsURLString) {
        UIApplication.shared.open(url, options: [:], completionHandler: nil)
    }
}

AVCaptureDevice.requestAccess(for: .video) { granted in
    DispatchQueue.main.async {
        self.cameraPermissionStatus = granted ? .authorized : .denied
    }
}