Custom Password TextField

import UIKit

class CustomPasswordTextField: CustomInsetTextField {

    let eyeOpenImage = UIImage(named: kEyeOpenImageName)
    let eyeCloseImage = UIImage(named: kEyeCloseImageName)
    var eyeButton = UIButton(type: .custom)

    public override init(frame: CGRect) {
        super.init(frame: frame)
        setup()
    }

    public required init?(coder: NSCoder) {
        super.init(coder: coder)
        setup()
    }

    func setup() {
        eyeButton.frame = CGRect(x: 0, y: 0, width: 26, height: 9)
        eyeButton.contentMode = UIViewContentMode.scaleAspectFit
        eyeButton.backgroundColor = UIColor.clear
        eyeButton.imageEdgeInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 10)
        eyeButton.addTarget(self, action: #selector(onEyeButtonClicked(_:)), for: .touchUpInside)
        eyeButton.setImage(eyeCloseImage, for: .normal)
        rightView = eyeButton
        rightViewMode = .always
        isSecureTextEntry = false
    }

    func onEyeButtonClicked(_ sender: Any) {
        isSecureTextEntry = !isSecureTextEntry
        if isSecureTextEntry {
            eyeButton.setImage(eyeCloseImage, for: .normal)
            rightView = eyeButton
        } else {
            eyeButton.setImage(eyeOpenImage, for: .normal)
            rightView = eyeButton
        }
    }

}