如何防止应用程序进入后台时在SwiftUI中取消选择MKMapView上的注释

class AppDelegate: NSObject, UIApplicationDelegate {
    func applicationDidEnterBackground(_ application: UIApplication) {
        // 在应用程序进入后台时执行的代码
        // 在这里取消选择MKMapView上的注释
    }
}

@main
struct YourApp: App {
    @UIApplicationDelegateAdaptor(AppDelegate.self) var appDelegate
    
    var body: some Scene {
        WindowGroup {
            ContentView()
        }
    }
}

struct ContentView: View {
    @State private var annotationSelected = false
    
    var body: some View {
        VStack {
            // 在这里放置你的MKMapView
            
            Button(action: {
                // 在按钮的动作中设置注释的选择状态
                annotationSelected.toggle()
            }) {
                Text("取消选择注释")
            }
        }
    }
}

func applicationDidEnterBackground(_ application: UIApplication) {
    if let contentView = UIApplication.shared.windows.first?.rootViewController?.view as? ContentView {
        contentView.annotationSelected = false
    }
}