为什么我的警报不能执行阻塞,也不能解除?

我在使用Sprite工具包的应用程序中遇到了类似的问题。解决方案如下:

let connectActionSheet = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)

connectActionSheet.addAction(UIAlertAction(title: "Button1", style: .default, handler: { (action:UIAlertAction) in

       //Code if this button is pressed
}))

connectActionSheet.addAction(UIAlertAction(title: "Button2", style: .default, handler: { (action:UIAlertAction) in

       //Code if button2 is pressed
}))

connectActionSheet.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))

let vc = self.view?.window?.rootViewController
if vc?.presentedViewController == nil {
       vc?.present(connectActionSheet, animated: true, completion: nil)
}

最后四行是它成功的原因。我希望这对你有帮助。

谢谢!我的视图控制器无法关闭此警报,因为这些代码

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

}

override func dismiss(animated flag: Bool, completion: (() -> Void)? = nil) {

}