使用UINavigationBarAppearance()时，NavigationBar颜色更改不会传递到其他视图

override func viewDidLoad() {
    super.viewDidLoad()
    
    let appearance = UINavigationBarAppearance()
    appearance.backgroundColor = .red
    
    navigationController?.navigationBar.standardAppearance = appearance
    navigationController?.navigationBar.scrollEdgeAppearance = appearance
}

class NavigationBarAppearanceManager {
    static let shared = NavigationBarAppearanceManager()
    
    private init() {}
    
    func setNavigationBarAppearance() {
        let appearance = UINavigationBarAppearance()
        appearance.backgroundColor = .red
        
        let navigationController = UIApplication.shared.keyWindow?.rootViewController as? UINavigationController
        navigationController?.navigationBar.standardAppearance = appearance
        navigationController?.navigationBar.scrollEdgeAppearance = appearance
    }
}

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
    let appearance = UINavigationBarAppearance()
    appearance.backgroundColor = .red
    
    let navigationController = UINavigationController()
    navigationController.navigationBar.standardAppearance = appearance
    navigationController.navigationBar.scrollEdgeAppearance = appearance
    
    window?.rootViewController = navigationController
    window?.makeKeyAndVisible()
    
    return true
}