iOS Programming: The Big Nerd Ranch Guide

For the More Curious: UICollectionView

The class UICollectionView is very similar to UITableView:

• It is a subclass of UIScrollView.

• It displays cells, although these cells inherit from UICollectionViewCell instead of UITableViewCell.

• It has a data source that supplies it with those cells.

• It has a delegate that gets informed about things like a cell being selected.

• Similar to UITableViewController, UICollectionViewController is a view controller class that creates a UICollectionView as its view and becomes its delegate and data source.

How is the collection view different? A table view only displays one column of cells; this is a huge limitation on a large-screen device like an iPad. A collection view can layout those ...