UIButton with UIButton.Configuration

MyButton.swift

import UIKit

final class MyButton: UIButton {
    override init(frame: CGRect) {
        super.init(frame: frame)

        var configuration = UIButton.Configuration.filled()
        configuration.title = "My Button"
        configuration.baseForegroundColor = .black
        configuration.baseBackgroundColor = .red
        self.configuration = configuration

        configurationUpdateHandler = { button in
            switch button.state {
            case .normal:
                button.configuration?.baseBackgroundColor = .red
            case .highlighted:
                button.configuration?.baseBackgroundColor = .blue
            default:
                break
            }
        }

        layer.cornerRadius = 5
    }

    @available(*, unavailable)
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
}