ios - 无论 IOS 13 中的 View 层次结构如何，都将 ViewController 呈现在所有内容之上

Question

在 iOS 13 中，模态视图 Controller 在呈现时有一个新行为。现在默认情况下它不是全屏，当我尝试将 modalPresentationStyle 更改为 .fullScreen 我的 View 显示并立即关闭。我正在用代码呈现 View Controller :

 if #available(iOS 13.0, *) {

        var popupWindow: UIWindow?

        let windowScene = UIApplication.shared
            .connectedScenes
            .filter { $0.activationState == .foregroundActive }
            .first
        if let windowScene = windowScene as? UIWindowScene {
            popupWindow = UIWindow(windowScene: windowScene)
        }

        let vc = UIViewController()
        vc.view.frame = UIScreen.main.bounds

        popupWindow?.frame = UIScreen.main.bounds
        popupWindow?.backgroundColor = .clear
        popupWindow?.windowLevel = UIWindow.Level.statusBar + 1
        popupWindow?.rootViewController = vc
        popupWindow?.makeKeyAndVisible()
        popupWindow?.rootViewController?.present(self, animated: true, completion: nil)
}

Answer 1

我找到了解决方案:

if #available(iOS 13.0, *) {
     if var topController = UIApplication.shared.keyWindow?.rootViewController  {
           while let presentedViewController = topController.presentedViewController {
                 topController = presentedViewController
                }
     self.modalPresentationStyle = .fullScreen
     topController.present(self, animated: true, completion: nil)
}