The Core iOS Developer’s Cookbook, Fifth Edition

Views

To create a collection view for embedding into another view (without using a UICollectionViewController), establish a layout, create the collection view using the layout, and set the data source and delegate. The flow layout delegate utilizes the object you set as the collection view’s delegate property:

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UICollectionViewFlowLayout *layout =     [[UICollectionViewFlowLayout alloc] init]; layout.scrollDirection = UICollectionViewScrollDirectionHorizontal; collectionView = [[UICollectionView alloc] initWithFrame:CGRectZero     collectionViewLayout:layout]; collectionView.dataSource = self; collectionView.delegate = self;