Modal Pop up in Swift 3

Question

我想使用 swift 实现一个弹出模式。我必须实现，以便根据用户点击的响应(是/否(再弹出一个弹出窗口。我该如何实现？任何帮助都会非常有帮助。

Answer 1

UIAlertController 就是为此目的而设计的。

        let alertController = UIAlertController(title: "Default AlertController", message: "A standard alert", preferredStyle: .Alert)
        let cancelAction = UIAlertAction(title: "No", style: .Cancel) { (action:UIAlertAction!) in
            println("you have pressed the No button");
            //Call another alert here
        }
        alertController.addAction(cancelAction)
        let OKAction = UIAlertAction(title: "Yes", style: .Default) { (action:UIAlertAction!) in
            println("you have pressed Yes button");
            //Call another alert here
        }
        alertController.addAction(OKAction)
        self.presentViewController(alertController, animated: true, completion:nil)