var alert:UIAlertController = UIAlertController(title: "确定不玩了嘛？", message: "", preferredStyle: UIAlertControllerStyle.ActionSheet)

        //UIAlertControllerStyle.ActionSheet

        //UIAlertControllerStyle.Alert

        var action1 = UIAlertAction(title: "确定", style: UIAlertActionStyle.Destructive) { (action) -> Void in

            println("exe");

        }

        var action2 = UIAlertAction(title: "取消", style: UIAlertActionStyle.Cancel) { (action) -> Void in

            println("Cancel");

        }

        alert.addAction(action1);

        alert.addAction(action2);

        self.presentViewController(alert, animated: true) { () -> Void in

            println(11);

        }

UIAlertController 控制器多能用法 ios8新