Question

我想在点击黑屏空间时通过点击UIAlertViewController外部来解雇我的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(_:))))
    })

但是如果我点击UIAlertViewController它就会关闭。但是我想在外面，半黑屏幕拍打。

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)
}

Answer 1

如果您使用的是ActionSheet样式，则无需执行此操作。因为当你点击半黑屏时，控制器会自动被取消。

但如果您想使用Alert样式，请执行以下操作（不使用：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)


        })

Answer 2

尝试将UITapGestureRecognizer添加到您的UIWindow课程中 view.window.addGestureRecognizer()
实现UIGestureRecognizerDelegate方法shouldReceiveTouch 并检查您的点击视图

希望这个帮助

通过点击外部来关闭UIAlertViewController

2 个答案: