Why use UICollectionView instead of UITableView? Explain it in terms of the internal structure: the layout object, attributes, and reuse.
A collection view is a container that separates what to show (dataSource) from where to put it (UICollectionViewLayout). The layout object computes layoutAttributes for each item, and the collection view materializes only the attributes in the visible region as cells and reuses them.
UIKitShort answerBasics
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UIKitShort answerExpert
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UIKitShort answerAdvanced
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