如何用轻击手势关闭SDCAlertView？

Question

为了显示警报，我使用SDCAlertView （UIAlertView的克隆）。 我想通过点击屏幕上的UIActionSheet来消除警报。

Answer 1

与UIAlertView不同， SDCAlertView作为视图添加到视图层次结构。 这意味着您可以简单地将轻SDCAlertView手势识别器添加到SDCAlertView视图，该[SDCAlertView dismissWithClickedButtonIndex:animated:]视图调用[SDCAlertView dismissWithClickedButtonIndex:animated:] 。

Answer 2

我找到了一种方法。 与iOS 7+兼容，但在8+上点击即可关闭。

class SmartAlert
{
    static var backroundWindow: UIWindow!
    static var alertController: SDCAlertController!

    class func showAlertWithTitle(title: String!, message: String!, actionTitle: String)
    {
        if (iOS8)
        {
            self.backroundWindow = UIWindow(frame: UIScreen.mainScreen().bounds)
            self.backroundWindow.backgroundColor = UIColor.clearColor()
            self.backroundWindow.rootViewController = EmptyViewController()
            self.backroundWindow.windowLevel = UIWindowLevelAlert
            self.backroundWindow.makeKeyAndVisible()
        }

        self.alertController = SDCAlertController(title: title, message: message, preferredStyle: .Alert)
        self.alertController.addAction(SDCAlertAction(title: actionTitle, style: .Default, handler:
        {
            (_) -> Void in
            self.backroundWindow = nil
        }))

        self.alertController.presentWithCompletion(nil)
    }

    class func dismissAlert()
    {
        self.alertController.dismissWithCompletion
        {
            self.backroundWindow = nil
        }
    }
}

class EmptyViewController: UIViewController
{
    override func touchesBegan(touches: Set<NSObject>, withEvent event: UIEvent)
    {
        SmartAlert.dismissAlert()
    }

    override func motionBegan(motion: UIEventSubtype, withEvent event: UIEvent)
    {
        if motion == UIEventSubtype.MotionShake
        {
            SmartAlert.dismissAlert()
        }
    }
}