controle do teclado

.swift

class ViewController: UIViewController , UITextFieldDelegate{
    
    @IBOutlet weak var scrollView : UIScrollView!
    
    @IBOutlet var textFields: [UITextField]!
    
    
    override func viewDidLoad() {
        super.viewDidLoad()
        NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow), name: .UIKeyboardWillShow , object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(keyboarbWillHide), name: .UIKeyboardWillHide , object: nil)
        textFields.forEach{$0.delegate = self}
        let tap = UITapGestureRecognizer(target: self, action: #selector(hideKeyboard) )
        scrollView.addGestureRecognizer(tap)
    }
    
    
    @objc func hideKeyboard(){
        view.endEditing(true)
    }
    
    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        return true
    }
    
    @objc func keyboardWillShow(_ notification : Notification ){
        let point = CGPoint(x: 0, y: 250)
        scrollView.setContentOffset(point, animated: true)
    }
    
    @objc func keyboarbWillHide(_ notification : Notification ){
        scrollView.setContentOffset(.zero, animated: true)
    }
    
}

eu não estou satisfeito com o número mágico na linha 28, mas tem como pegar esse valor notification.userInfo?[UIKeyboardFrameEndUserInfoKey] porém o valor é maior do que eu queria que fosse, mas vou estudar mais.