alignment right 属性を持つ TextField で右端のスペースを表示できるようにする

AlignmentRightTextFieldViewController.swift

import UIKit

class ViewController: UIViewController, UITextFieldDelegate {
    
    private var myTextField: UITextField!

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let width: CGFloat = 200
        let height: CGFloat = 30
        let x: CGFloat = (self.view.bounds.width - width) / 2
        let y: CGFloat = (self.view.bounds.height - height) / 2
        
        myTextField = UITextField(frame: CGRect(x:x, y:y, width:width, height:height))
        myTextField.text = "Hello"
        myTextField.delegate = self
        myTextField.borderStyle = .roundedRect
        myTextField.textAlignment = .right
        
        self.view.addSubview(myTextField)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }
    
    func textFieldDidBeginEditing(_ textField: UITextField) {
        
    }
    
    func textFieldDidEndEditing(_ textField: UITextField) {
        
    }

    func textFieldShouldReturn(_ textField: UITextField) -> Bool {
        textField.resignFirstResponder()
        
        return true
    }
    
    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
        let text = textField.text!
        
        if range.location == text.characters.count && string == " " {
            textField.text = text + "\u{00a0}"
            return false
        }
        
        return true
    }

}