Custom textfield with left and right view

import UIKit

enum ButtonType: Int {
    case leftView
    case rightView
}

typealias CompletionButtonPressed = (_ success: Bool, _ type: ButtonType) -> Void

class CustomTextField: UITextField {

    var completion: CompletionButtonPressed?

    lazy var leftViewButton: UIButton = {
        let button = UIButton(type: .system)
//      button.setImage(, for: .normal) Use your image to assign in this line
        button.addTarget(self, action: #selector(handleLeftViewButton), for: .touchUpInside)
        button.frame = CGRect(x: 0, y: 0, width: 20, height: self.frame.size.height) // Use this attribute to give frame for left view
//      button.isUserInteractionEnabled = false Use this line for user interaction If you want, user interact with this button.
//      button.imageEdgeInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)  Use Inset as per your requirement for image
        return button
    }()

    lazy var rightViewButton: UIButton = {
        let button = UIButton(type: .system)
//      button.setImage(, for: .normal)    Use your image to assign in this line
        button.addTarget(self, action: #selector(handleRightViewButton), for: .touchUpInside)
        button.frame = CGRect(x: 0, y: 0, width: 20, height: self.frame.size.height) // Use this attribute to give frame for right view
//      button.imageEdgeInsets = UIEdgeInsets(top: 0, left: 0, bottom: 0, right: 0)  Use Inset as per your requirement for image
//      button.isUserInteractionEnabled = false Use this line for user interaction If you want, user interact with this button.
        return button
    }()

    // MARK: - Use when assign to storyboard -
    override func awakeFromNib() {
        super.awakeFromNib()
        setupInitializationProperties()
    }

    // MARK: - Use when programatically initialize -
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupInitializationProperties()
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    fileprivate func setupInitializationProperties() {
        leftView = leftViewButton
        rightView = rightViewButton
        rightViewMode = .always
        leftViewMode = .always
    }

    // MARK: - Left Button handler
    @objc fileprivate func handleLeftViewButton() {
//      if you want your custom logic, perform here before completion
        completion?(true, .leftView)
    }

    // MARK: - Right button handler
    @objc fileprivate func handleRightViewButton() {
//      if you want your custom logic, perform here before completion
        completion?(true, .rightView)
    }
}