The alerts that come out from below are implemented using UIAlertController.
A long time ago, there was a time when alerts coming out of the bottom were called UIActionSheets, but they have been integrated into UIAlertController.
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| import UIKit | |
| class ViewController: UIViewController { | |
| override func viewDidLoad() { | |
| super.viewDidLoad() | |
| let viewWidth = self.view.frame.width | |
| let viewHeight = self.view.frame.height | |
| //アラート表示用のボタンを用意する | |
| let basicButton = UIButton() | |
| basicButton.frame = CGRect(x: viewWidth*0.1, y: viewHeight*0.45, width: viewWidth*0.8, height: viewHeight*0.1) | |
| basicButton.backgroundColor = UIColor.orange | |
| basicButton.setTitle("押すとアラートが出るよ", for: UIControlState.normal) | |
| basicButton.setTitleColor(UIColor.white, for: UIControlState.normal) | |
| basicButton.addTarget(self, action: #selector(showAlert(sender:)), for:.touchUpInside) | |
| self.view.addSubview(basicButton) | |
| } | |
| //ボタンが押されるとこの関数が呼ばれる | |
| @objc func showAlert(sender: UIButton){ | |
| //UIAlertControllerを用意する | |
| let actionAlert = UIAlertController(title: "ポケモンリスト", message: "好きなポケモンを選んでください。", preferredStyle: UIAlertControllerStyle.actionSheet) | |
| //UIAlertControllerにカビゴンのアクションを追加する | |
| let kabigonAction = UIAlertAction(title: "カビゴン", style: UIAlertActionStyle.default, handler: { | |
| (action: UIAlertAction!) in | |
| print("カビゴンのシートが選択されました。") | |
| }) | |
| actionAlert.addAction(kabigonAction) | |
| //UIAlertControllerにピカチュウのアクションを追加する | |
| let pikachuAction = UIAlertAction(title: "ピカチュウ", style: UIAlertActionStyle.default, handler: { | |
| (action: UIAlertAction!) in | |
| print("ピカチュウのシートが選択されました。") | |
| }) | |
| actionAlert.addAction(pikachuAction) | |
| //UIAlertControllerにキャンセルのアクションを追加する | |
| let cancelAction = UIAlertAction(title: "キャンセル", style: UIAlertActionStyle.cancel, handler: { | |
| (action: UIAlertAction!) in | |
| print("キャンセルのシートが押されました。") | |
| }) | |
| actionAlert.addAction(cancelAction) | |
| //アクションを表示する | |
| self.present(actionAlert, animated: true, completion: nil) | |
| } | |
| } |