let cardContainerView = CardContainerView(frame: aFrame)// with defalut card size.
cardContainerView.dataSource = id<CardContainerDataSource>

public protocol CardContainerDataSource: class{
    func numberOfCards(for cardContainerView: UICardContainerView) -> Int
    func cardContainerView(_ cardContainerView: UICardContainerView, imageForCardAt index: Int) -> UIImage?
}

let cardAnimationView = CardAnimationView.init(frame: aFrame)// with defalut card size.
cardAnimationView.dataSourceDelegate = id<CardAnimationViewDataSource>

protocol CardAnimationViewDataSource : class {
    func numberOfVisibleCards() -> Int
    func numberOfCards() -> Int
    // Return view displayed in the CardAnimationView. If reusedView is not nil,
    // you could configure and return it to reuse it.
    func cardNumber(number:Int, reusedView:BaseCardView?) -> BaseCardView
}