通过点击外部关闭 UIAlertViewController

Posted 2023-02-23

【中文标题】通过点击外部关闭 UIAlertViewController

【英文标题】：Dismiss UIAlertViewController by tapping outside

【发布时间】：2016-06-22 12:51:42

【问题描述】：

我想通过在 UIAlertViewController 外部点击黑屏空间来关闭我的 UIAlertViewController。我试过这个：

self.presentViewController(alertViewController, animated: true, completion:
        alertViewController.view.superview?.userInteractionEnabled = true
        alertViewController.view.superview?.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.alertClose(_:))))
    )

但如果我点击 UIAlertViewController，它就会关闭。但我想在外面，半黑的屏幕被敲击的地方。

有可能吗？

更新

@IBAction func shareButtonTapped(sender: UIButton) 
    let alertViewController = UIAlertController(title: "Share on social networks", message: "Where do you want to share?", preferredStyle: .ActionSheet)

    let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: "dismissAlertView:")
    self.view.addGestureRecognizer(tapGestureRecognizer)

    let facebookAction = UIAlertAction(title: "Facebook", style: .Default)  (alert: UIAlertAction) -> Void in

    

    let twitterAction = UIAlertAction(title: "Twitter", style: .Default)  (alert: UIAlertAction) -> Void in

    

    let cancelAction = UIAlertAction(title: "Cancel", style: .Destructive)  (alert: UIAlertAction) -> Void in

    

    alertViewController.addAction(facebookAction)
    alertViewController.addAction(twitterAction)
    alertViewController.addAction(cancelAction)

    self.presentViewController(alertViewController, animated: true, completion:
        alertViewController.view.superview?.userInteractionEnabled = true
        alertViewController.view.superview?.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.alertClose(_:))))
    )

AlertClose 函数：

func alertClose(gesture: UITapGestureRecognizer) 
    self.dismissViewControllerAnimated(true, completion: nil)

【问题讨论】：

发布您的alertClose 功能。

我猜你的意思是 UIAlertController？您可能需要继承 UIAlertController，将 GestureRecognizer 委托设置为 self，然后您可以覆盖 shouldReceiveTouches:。这样，当触摸在主窗口上方时，您可以返回 false。这应该会给你想要的效果。

@代码完成！我添加了代码的其他部分

已经提出问题并回答HERE.

@mitulmarsonia 那些答案对我没有帮助 =/

【参考方案1】：

如果您使用的是 ActionSheet 样式，则无需这样做。因为当您点击半黑屏时，视图控制器会自动被关闭。

但如果你想使用警报样式，请执行以下操作（没有：alertViewController.view.superview?.userInteractionEnabled = true）：

        self.presentViewController(alertViewController, animated: true, completion: 

            let tapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.alertClose(_:)))
            alertViewController?.view.superview?.addGestureRecognizer(tapGestureRecognizer)


        )

【参考方案2】：

尝试将UITapGestureRecognizer 添加到您的UIWindow 类中，例如 view.window.addGestureRecognizer()

实现 UIGestureRecognizerDelegate 方法shouldReceiveTouch 并检查您点击的视图

希望有帮助