无法在SwiftUI中查看全屏

import SwiftUI

struct ContentView: View {
    var body: some View {
        Text("Hello, World!")
            .frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity)
            .background(Color.blue)
            .edgesIgnoringSafeArea(.all)
    }
}

import SwiftUI

struct ContentView: View {
    var body: some View {
        Text("Hello, World!")
            .frame(minWidth: 0, maxWidth: .infinity, minHeight: 0, maxHeight: .infinity)
            .background(Color.blue)
            .edgesIgnoringSafeArea(.all)
            .onAppear {
                UIApplication.shared.windows.first?.windowLevel = .normal
                UIApplication.shared.windows.first?.isHidden = false
                UIApplication.shared.isStatusBarHidden = true
            }
    }
}

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
    let contentView = ContentView()

    if let windowScene = scene as? UIWindowScene {
        let window = UIWindow(windowScene: windowScene)
        window.rootViewController = UIHostingController(rootView: contentView)
        window.windowLevel = UIWindow.Level.normal
        window.isHidden = false
        window.sizeToFit()
        window.frame = windowScene.screen.bounds
        self.window = window
        window.makeKeyAndVisible()
    }
}

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    window = UIWindow(frame: UIScreen.main.bounds)
    window?.rootViewController = UIHostingController(rootView: ContentView())
    window?.makeKeyAndVisible()
    return true
}