This video will show you how to use UICollectionView, UICollectionViewDelegateFlowLayout, UIColllectionViewDataSource and auto layout constraints programmatically to build a very basic instagram style layout.
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I wrote a medium article covering the exact same concepts. You can find links to the docs and medium article below.
UICollectionView docs: https://developer.apple.com/documenta...
UICollectionView Medium Article I wrote: https://itnext.io/uicollectionview-ui...
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