Password With Show hide button

import UIKit

class PasswordTextField: UITextField {
    
    private let toggleButton = UIButton(type: .custom)
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupView()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupView()
    }
    
    private func setupView() {
        isSecureTextEntry = true
        borderStyle = .roundedRect
        rightViewMode = .always
        setupToggleButton()
    }
    
    private func setupToggleButton() {
        let buttonSize = CGSize(width: 24, height: 24)
        toggleButton.setImage(UIImage(systemName: "eye.fill"), for: .normal)
        toggleButton.frame = CGRect(origin: .zero, size: buttonSize)
        toggleButton.contentMode = .scaleAspectFit
        toggleButton.addTarget(self, action: #selector(togglePasswordVisibility), for: .touchUpInside)
        rightView = toggleButton
        addConstraints()
    }
    
    private func addConstraints() {
        toggleButton.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            toggleButton.trailingAnchor.constraint(equalTo: self.trailingAnchor, constant: -8),
            toggleButton.centerYAnchor.constraint(equalTo: self.centerYAnchor),
            toggleButton.widthAnchor.constraint(equalToConstant: 24),
            toggleButton.heightAnchor.constraint(equalToConstant: 24)
        ])
    }
    
    @objc private func togglePasswordVisibility() {
        isSecureTextEntry.toggle()
        let imageName = isSecureTextEntry ? "eye.fill" : "eye.slash.fill"
        toggleButton.setImage(UIImage(systemName: imageName), for: .normal)
    }
}

import UIKit

class ViewController: UIViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        let passwordTextField = PasswordTextField(frame: CGRect(x: 50, y: 100, width: 200, height: 40))
        passwordTextField.placeholder = "Password"
        view.addSubview(passwordTextField)
    }
}