CardViewController makes use of a Card factory that you can use to inject N Cards. A maximum number of Items per Card, MaxItems, can be supplied, and a random number between 1 and maxItems will be included in the card.

The CollectionTableCell is the UITableViewCell that will contain a UICollectionView. If we want to display a single Card - We will be displaying a tableView with a single Cell. 

A single CollectionTableCell, containing a UICollectionView dor every Card, we will display a CollectionTableCell. Their data source is a CardViewModel. CardViewModel contains an array of ItemViewModels- Its data-source. Each of these is displayed using a custom UICollectionViewCell.

Each ItemCell is registered in our UICollectionView. When a new ItemCell is created it needs to be registered with CollectionTableCell.

CardFlowLayout is how each Item cell is displayed in a column. The Item width is set to the width of the collection view.

CardViewModel is initialized with a Card model. For the example project, A TitleItemViewModel and an ImageItemViewModel is injected as the first and second objects in the data-source array. Each Item model in our Card is used to create an ItemCellViewModel. Finally, a FooterItemViewmodel is appended. 

CardItemCell is a parent class of all the items in our collection View.

CardItems are simply custom UICollectionViewCells and their corresponding ViewModel. Theres no limit to the number of Item types used in a Card. In the case of the sample application, 4 CardItems have been defined. TextItemCell, a TitleItemCell, FooterItemCell and an ImageItemCell.