ios - 在Swift 3中弹出模态

Question

我想使用swift实现弹出模式。我必须实现这样，根据用户的响应(是/否)再弹出一个弹出窗口，如何实现呢？
任何帮助都会非常有帮助。

Answer 1

UIAlertController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)