Communicating using delegation

Delegation is a simple pattern that allows objects to communicate with each other in a loosely coupled interface. Delegation is also based on a protocol that allows classes to communicate with different types of objects.

Let’s see a small example of delegation:

protocol MyViewDelegate: AnyObject {    func didTapButton()
}
class MyView: UIView {
    weak var delegate: MyViewDelegate?
    private let button = UIButton(type: .system)
    override init(frame: CGRect) {
        super.init(frame: frame)
        button.addTarget(self, action: #selector
            (buttonTapped), for: .touchUpInside)
        addSubview(button)
    }
    override func...