UIAlertControllerにUITextViewを追加

textViewInAlertView.swift

class ViewController: UIViewController, UITextViewDelegate {
    

    @IBOutlet weak var memoTextView: ToucheEventTextView!
    
   
    
    override func viewDidLoad() {
        super.viewDidLoad()

        memoTextView.delegate = self
        memoTextView.tag = 123
   
    }
 
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
     if isTouch(touches: touches, view: memoTextView) {
                print("TextView touch!!")
            }
    }
    
    func isTouch(touches: Set<UITouch>, view:UIView) -> Bool{
        
        for touch: AnyObject in touches {
                let t: UITouch = touch as! UITouch
                if t.view?.tag == view.tag {
                    let alertController = UIAlertController(title: "\n\n\n\n\n\n", message: nil, preferredStyle: UIAlertController.Style.alert)
                    let margin:CGFloat = 8.0
                    let rect = CGRect(x: margin, y: margin, width: 255, height: 150.0)
                    let customView = UITextView(frame: rect)
                    customView.backgroundColor = UIColor.white
                    customView.textColor = .black
                    customView.font = UIFont(name: "Helvetica", size: 16)
                    customView.text = memoTextView.text
                    customView.delegate = self

                    // ツールバー生成
                    let toolBar = UIToolbar(frame: CGRect(x: 0, y: 0, width: 320, height: 40))
                    // スタイルを設定
                    toolBar.barStyle = UIBarStyle.default
                    // 画面幅に合わせてサイズを変更
                    toolBar.sizeToFit()
                    // 閉じるボタンを右に配置
                    let spacer = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.flexibleSpace, target: self, action: nil)
                    // 閉じるボタン
                    let commitButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.done, target: self, action: #selector(commitButtonTapped))
                    // スペース、閉じるボタンを右側に配置
                    toolBar.items = [spacer, commitButton]
                    // textViewのキーボードにツールバーを設定
                    customView.inputAccessoryView = toolBar
                                        
                 
                    alertController.view.addSubview(customView)
                  
                    let somethingAction = UIAlertAction(title: "メモ編集", style: UIAlertAction.Style.default, handler: {(alert: UIAlertAction!) in
                        print(customView.text!)
                        self.memoTextView.text = customView.text
                    })
                  
                    let cancelAction = UIAlertAction(title: "キャンセル", style: UIAlertAction.Style.cancel, handler: {(alert: UIAlertAction!) in print("cancel")})
                    alertController.addAction(somethingAction)
                    alertController.addAction(cancelAction)
                    self.present(alertController, animated: true, completion: nil)
                    
                    return true
                } else {
                    return false
                }
            }
            return false
        }
    
    
    @objc func commitButtonTapped() {
        if var topController = UIApplication.shared.keyWindow?.rootViewController {
            while let presentedViewController = topController.presentedViewController {
                topController = presentedViewController
            }
            topController.view.endEditing(true)
        }
        
    }
    
 

}
 





class ToucheEventTextView: UITextView {
    
    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let next = next {
            next.touchesBegan(touches , with: event)
        } else {
            super.touchesBegan(touches , with: event)
        }
    }

    override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let next = next {
            next.touchesEnded(touches , with: event)
        } else {
            super.touchesEnded(touches , with: event)
        }
    }

    override func touchesCancelled(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let next = next {
            next.touchesCancelled(touches, with: event)
        } else {
            super.touchesCancelled(touches, with: event)
        }
    }

    override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent?) {
        if let next = next {
            next.touchesMoved(touches, with: event)
        } else {
            super.touchesMoved(touches, with: event)
        }
    }
    
    
}