[swift] UIAlertAction,UIAlertController,ActionSheet

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var label1: UILabel!

    override func viewDidLoad() {

        super.viewDidLoad()

        // Do any additional setup after loading the view, typically from a nib.

    }

    override func didReceiveMemoryWarning() {

        super.didReceiveMemoryWarning()

        // Dispose of any resources that can be recreated.

    }

    @IBAction func showAlertView(sender: UIButton) {

        let alertController = UIAlertController(title: "會員登入", message: "請輸入帳號密碼", preferredStyle: .Alert)

        let button1 = UIAlertAction(title: "取消", style: .Default) { (button1) in

            

        }

        let button2 = UIAlertAction(title: "登入", style: .Default) { (button2) in

            let username = alertController.textFields?.first?.text

            let passwd = alertController.textFields?.last?.text

            if username == "class" && passwd == "a1234" {

                self.label1.text = "登入成功"

            }else{

                self.label1.text = "帳號密碼錯誤"

            }

        }

        

        alertController.addTextFieldWithConfigurationHandler { (textField) in

            textField.placeholder = "username"

        }

        

        alertController.addTextFieldWithConfigurationHandler { (textField) in

            textField.placeholder = "password"

            textField.secureTextEntry = true

        }

        

        alertController.addAction(button1)

        alertController.addAction(button2)

        self.presentViewController(alertController, animated: true, completion: nil)

    }

    

    @IBAction func showActionSheet(sender: UIButton) {

        let alertController = UIAlertController(title: "Office課程費用查詢", message: "請選擇課程種類", preferredStyle: .ActionSheet)

        let button1 = UIAlertAction(title: "Word", style: .Default) { (button1) in

            self.label1.text = "Word:$7000"

        }

        let button2 = UIAlertAction(title: "Excel", style: .Default) { (button2) in

            self.label1.text = "Excel:$7900"

        }

        

        let button3 = UIAlertAction(title: "PowerPoint", style: .Default) { (button3) in

            self.label1.text = "PowerPoint:$8500"

        }

        let button4 = UIAlertAction(title: "Access", style: .Default) { (button4) in

            self.label1.text = "Access:$10000"

        }

        

        alertController.addAction(button1)

        alertController.addAction(button2)

        alertController.addAction(button3)

        alertController.addAction(button4)

        self.presentViewController(alertController, animated: true, completion: nil)

    }

}

showAlertView畫面

登入成功時的畫面

登入失敗時的畫面

showActionSheet的畫面

點選後的訊息畫面