带有SceneDelegate和第一个视图的黑色背景

func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) {
    guard let windowScene = (scene as? UIWindowScene) else { return }
    
    let viewController = ViewController() // 替换为你的第一个视图控制器类名
    let navigationController = UINavigationController(rootViewController: viewController)
    
    let window = UIWindow(windowScene: windowScene)
    window.rootViewController = navigationController
    window.backgroundColor = UIColor.black // 设置窗口的背景颜色为黑色
    window.makeKeyAndVisible()
    self.window = window
}