Binder

binder.swift

import UIKit

typealias EmptyClosure = () -> Void

final class MyEW {
    let onDo: EmptyClosure

    init(onDo: @escaping EmptyClosure) {
        self.onDo = onDo
    }
}

final class Binder<EventsWrapper> {
    private let onBinded: EmptyClosure
    var eventsWrapper: EventsWrapper!

    init(onBinded: @escaping EmptyClosure) {
        self.onBinded = onBinded
    }

    func bind(eventsWrapper: EventsWrapper) {
        self.eventsWrapper = eventsWrapper

        onBinded()
    }
}

final class VM {
    let binder: Binder<MyEW> = {
        let binder = Binder<MyEW> {
            print("MS: binded")
        }
        return binder
    }()

    func doo() {
        binder.eventsWrapper.onDo()
    }
}

final class V {

    func viewDidLoad() {
        let mew = MyEW(onDo: { print("MS: ") })
        let vm = VM()
        vm.binder.bind(eventsWrapper: mew)

        vm.doo()
    }
}

let v = V()
v.viewDidLoad()