MyPlayground.swift

protocol Tappable {
    func getName() -> String
}

class BaseViewCell {
    init() {
        print("Init viewCell")
    }
    
    func boom() {
    
    }
}

protocol AwesomeViewCellDelegate: class {
    func tapEvent(viewCell: AwesomeViewCell)
}

class AwesomeViewCell : BaseViewCell, Tappable {
    weak var delegate: AwesomeViewCellDelegate?
    
    func getName() -> String {
        return "AwesomeViewCell"
    }
    
    override func boom() {
        delegate?.tapEvent(viewCell: self)
    }
}

protocol GreatViewCellDelegate: class {
    func tapEvent(viewCell: GreatViewCell)
}

class GreatViewCell : BaseViewCell, Tappable {
    weak var delegate: GreatViewCellDelegate?
    
    func getName() -> String {
        return "GreatViewCell"
    }
    
    override func boom() {
        delegate?.tapEvent(viewCell: self)
    }
}

class Main {
    var cells: [BaseViewCell] = []
    
    init() {
        print("init Main")
        registerCell()
        
        cells.forEach { (cell) in
            cell.boom()
        }
    }
    
    func registerCell() {
        let aCell = AwesomeViewCell()
        aCell.delegate = self
        cells.append(aCell)
        
        let gCell = GreatViewCell()
        gCell.delegate = self
        cells.append(gCell)
    }
   
    // all delegated events are gathered this func.
    func tapped(viewCell: Tappable) {
        print("Tapped: \(viewCell.getName())")
    }
}

extension Main: AwesomeViewCellDelegate {
    func tapEvent(viewCell: AwesomeViewCell) {
        tapped(viewCell: viewCell)
    }
}

extension Main: GreatViewCellDelegate {
    func tapEvent(viewCell: GreatViewCell) {
        tapped(viewCell: viewCell)
    }
}

Main()