如何在显示另一个swiftUI视图时停止摄像头工作？

import SwiftUI
import AVFoundation

struct CameraView: UIViewRepresentable {
    func makeUIView(context: Context) -> AVCaptureVideoPreviewLayer {
        let captureSession = AVCaptureSession()
        
        guard let videoCaptureDevice = AVCaptureDevice.default(for: .video) else { return AVCaptureVideoPreviewLayer() }
        guard let videoInput = try? AVCaptureDeviceInput(device: videoCaptureDevice) else { return AVCaptureVideoPreviewLayer() }
        
        captureSession.addInput(videoInput)
        captureSession.startRunning()
        
        let previewLayer = AVCaptureVideoPreviewLayer(session: captureSession)
        return previewLayer
    }
    
    func updateUIView(_ uiView: AVCaptureVideoPreviewLayer, context: Context) {
        
    }
}

class CameraController: ObservableObject {
    let captureSession = AVCaptureSession()
    
    func startRunning() {
        guard let videoCaptureDevice = AVCaptureDevice.default(for: .video) else { return }
        guard let videoInput = try? AVCaptureDeviceInput(device: videoCaptureDevice) else { return }
        
        captureSession.addInput(videoInput)
        captureSession.startRunning()
    }
    
    func stopRunning() {
        captureSession.stopRunning()
    }
}

struct ContentView: View {
    @State private var showCamera = false
    @ObservedObject private var cameraController = CameraController()
    
    var body: some View {
        VStack {
            if showCamera {
                CameraView()
                    .frame(width: 300, height: 300)
            } else {
                Text("Another View")
            }
            
            Button(action: {
                if showCamera {
                    cameraController.stopRunning()
                } else {
                    cameraController.startRunning()
                }
                
                showCamera.toggle()
            }) {
                Text(showCamera ? "Stop Camera" : "Start Camera")
            }
        }
    }
}

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