Simple playground testing .isSelected property to change image

UIButtonSelected.swift

import UIKit
import PlaygroundSupport

final class MyViewController: UIViewController {

    let button = UIButton(type: .custom)

    override func loadView() {
        let view = UIView()
        view.backgroundColor = .green
        
        button.setImage(UIImage(named: "LightUnselected.png"), for: .normal)
        button.setImage(UIImage(named: "LikeSelected.png"), for: .selected)
        button.setTitleColor(.black, for: .normal)
        button.isUserInteractionEnabled = true
        button.addTarget(self, action: #selector(buttonDidTap), for: .touchDown)
        
        view.addSubview(button)
        
        button.translatesAutoresizingMaskIntoConstraints = false
        button.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
        button.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true

        
        self.view = view
    }
    
    @objc
    private func buttonDidTap() {
        button.isSelected = !button.isSelected
    }
}

let viewController = MyViewController()
PlaygroundPage.current.liveView = viewController
PlaygroundPage.current.needsIndefiniteExecution = true