ios - 关闭所有当前呈现的 UIAlertControllers

Question

有没有办法关闭当前显示的所有 UIAlertController？

这是因为在我的应用程序的任何地方和任何状态下，我都需要在按下推送通知时到达某个 ViewController。

Answer 1

func dismissAnyAlertControllerIfPresent() {
    guard let window :UIWindow = UIApplication.shared.keyWindow , var topVC = window.rootViewController?.presentedViewController else {return}
    while topVC.presentedViewController != nil  {
        topVC = topVC.presentedViewController!
    }
    if topVC.isKind(of: UIAlertController.self) {
        topVC.dismiss(animated: false, completion: nil)
    }
}

这对我有用!

编辑:适用于 iOS 13+

 func dismissAnyAlertControllerIfPresent() {
       guard let window = windows.first(where: { $0.isKeyWindow }),
       var topVC = window.rootViewController?.presentedViewController else {return}
       while topVC.presentedViewController != nil  {
           topVC = topVC.presentedViewController!
       }
       if topVC.isKind(of: UIAlertController.self) {
           topVC.dismiss(animated: false, completion: nil)
       }
   }