彈出視圖控制器在 Xcode 11.2.1 中打開后立即關閉

Question

通過使用以下方法調用彈出窗口

func annoucementdisplay()
{
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let ivc = storyboard.instantiateViewController(withIdentifier: "PopUpViewController") as! PopUpViewController
    ivc.modalTransitionStyle = .crossDissolve
    ivc.modalPresentationStyle = .custom
    let quiclvw = UIWindow(frame: UIScreen.main.bounds)
    quiclvw.windowLevel = UIWindow.Level.alert
    quiclvw.rootViewController = UIViewController()
    quiclvw.makeKeyAndVisible()
    let transition = CATransition()
    transition.duration = 1.0
    transition.type = CATransitionType.reveal
    transition.subtype = CATransitionSubtype.fromBottom
    quiclvw.layer.add(transition, forKey: kCATransition)
    quiclvw.rootViewController?.present(ivc, animated: true, completion: nil)
}

它在 Xcode 10.3 中運行良好，但是當我在 Xcode 11.2.1 中運行我的代碼時，彈出窗口即將出現，但在打開后立即關閉。

我試過

ivc.modalPresentationStyle = .fullScreen

但它不起作用。

Answer 1

我已經在我的 xCode 11.2 上運行了這段代碼，它運行成功。

func annoucementdisplay()
{
    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let ivc = storyboard.instantiateViewController(withIdentifier: "PopUpViewController") as! PopUpViewController
    ivc.modalTransitionStyle = .crossDissolve
    ivc.modalPresentationStyle = .custom
    let quiclvw = UIWindow(frame: UIScreen.main.bounds)
    quiclvw.windowLevel = UIWindow.Level.alert
    quiclvw.rootViewController = UIViewController()
    quiclvw.makeKeyAndVisible()
    let transition = CATransition()
    transition.duration = 1.0
    transition.type = CATransitionType.reveal
    transition.subtype = CATransitionSubtype.fromBottom
    quiclvw.layer.add(transition, forKey: kCATransition)
    present(ivc, animated: true, completion: nil)
}