在UIWindow中從UIWindow取消UIAlertController

Question

我有一個UIWindow ，用於顯示第二個UIWindow其rootViewController正在呈現UIAlertController 。 當我關閉UIAlertController ，主窗口沒有響應，我不確定為什么。 這是我的實現：

func buttonPressed() {

        var window = UIWindow(frame: UIScreen.mainScreen().bounds)

        let alert = UIAlertController(title: "Add a comment to your post?", message: "You can also tag your friends.", preferredStyle: UIAlertControllerStyle.Alert)

        let cancel = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: { (action) -> Void in

            // this isn't working
            window.rootViewController?.dismissViewControllerAnimated(true, completion: nil)
            window.removeFromSuperview()



        })

        let ok = UIAlertAction(title: "Yes", style: UIAlertActionStyle.Default, handler: { (action) -> Void in

            // do something

        })

        alert.addAction(ok)
        alert.addAction(cancel)
        alert.addTextFieldWithConfigurationHandler({(txtField: UITextField) in
            txtField.placeholder = "What's on your mind?"
            txtField.keyboardType = UIKeyboardType.Default
            txtField.autocapitalizationType = .None
        })



        window.rootViewController = UIViewController()
        window.backgroundColor = UIColor.clearColor()
        window.makeKeyAndVisible()
        window.rootViewController?.presentViewController(alert, animated: true, completion: nil)
        self.addSubview(window)

        self.repostButton.setTitle("Pressed!", forState: UIControlState.Normal)

    }

Answer 1

得到它了。 在取消的完成處理程序中僅調用window.hidden = true 。 猜猜我只是想了一下。 :)