Setting Up a Collection View
The Basic Flow Layout example in the sample app demonstrates setting up a collection view with a minimum of customization, to show how quickly and easily a collection view can be created. Instead of using a basic UIViewController subclass, the basic flow used a UICollectionViewController subclass called PHGBasicFlowViewController, which conforms to the UICollectionViewDataSource and UICollectionViewDelegate protocols. This approach is not required; it is convenient when the collection view is all that is being displayed for a view controller. A collection view can be used with a standard view controller with no issues:
1. In the MainStoryboard, examine the Basic Flow View Controller–Basic Scene.
2. Expand the scene ...
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