10 UIAlertController

Swift 3.0 // // ViewController.swift // UIKit010 // import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() // Viewの背景をCyanに設定する. self.view.backgroundColor = UIColor.cyan // Buttonの定義する. let myButton: UIButton = UIButton() let buttonWidth: CGFloat = 200 let buttonHeight: CGFloat = 40 let posX: CGFloat = (self.view.bounds.width - buttonWidth)/2 let posY: CGFloat = 200 myButton.frame = CGRect(x: posX, y: posY, width: buttonWidth, height: buttonHeight) myButton.backgroundColor = UIColor.red myButton.layer.masksToBounds = true myButton.layer.cornerRadius = 20.0 myButton.setTitle("UIAlertを発動", for: .normal) myButton.setTitleColor(UIColor.white, for: .normal) myButton.addTarget(self, action: #selector(onClickMyButton(sender:)), for: .touchDown) // ボタンをViewに追加する self.view.addSubview(myButton) } /* ボタンイベント */ internal func onClickMyButton(sender: UIButton){ // UIAlertControllerを作成する. let myAlert: UIAlertController = UIAlertController(title: "タイトル", message: "メッセージ", preferredStyle: .alert) // OKのアクションを作成する. let myOkAction = UIAlertAction(title: "OK", style: .default) { action in print("Action OK!!") } // OKのActionを追加する. myAlert.addAction(myOkAction) // UIAlertを発動する. present(myAlert, animated: true, completion: nil) } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() } } Swift 2.3 // // ViewController.swift // UIKit010 // import UIKit class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad() // Viewの背景をCyanに設定する. self.view.backgroundColor = UIColor.cyanColor() // Buttonの定義する. let myButton: UIButton = UIButton() let buttonWidth: CGFloat = 200 let buttonHeight: CGFloat = 40 let posX: CGFloat = (self.view.bounds.width - buttonWidth)/2 let posY: CGFloat = 200 myButton.frame = CGRectMake(posX, posY, buttonWidth, buttonHeight) myButton.backgroundColor = UIColor.redColor() myButton.layer.masksToBounds = true myButton.layer.cornerRadius = 20.0 myButton.setTitle("UIAlertを発動", forState: .Normal) myButton.setTitleColor(UIColor.whiteColor(), forState: .Normal) myButton.addTarget(self, action: #selector(onClickMyButton(_:)), forControlEvents: .TouchDown) // ボタンをViewに追加する self.view.addSubview(myButton) } /* ボタンイベント */ internal func onClickMyButton(sender: UIButton){ // UIAlertControllerを作成する. let myAlert: UIAlertController = UIAlertController(title: "タイトル", message: "メッセージ", preferredStyle: .Alert) // OKのアクションを作成する. let myOkAction = UIAlertAction(title: "OK", style: .Default) { action in print("Action OK!!") } // OKのActionを追加する. myAlert.addAction(myOkAction) // UIAlertを発動する. presentViewController(myAlert, animated: true, completion: nil) } override func didReceiveMemoryWarning() { super.didReceiveMemoryWarning() } } 2.3と3.0の差分 presentViewController()がpresent()に変更.

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