Compositional Layouts in Swift

Updated 30 September 2021


UITableView used UICollectionView for the more complex view and scroll left to right or top to bottom with different presentations where we have used many other UITableViewCell and UICollectionViews. So, in WWDC 2019 apple introduce a Compositional Layout(UICollectionViewCompositionalLayout) which is used to create custom UICollectionViewLayout.

Compositional layouts create with the combination of small layout groups and convert into large complex layout groups. So it will be helpful to create a complex view because it is divided into small views. It divided into four basic building blocks, and it’s a hierarchy that consists of:

Implementation of Compositional Layout:

Let’s explain the compositional layout with the examples as :

Handling Compositional Layout with Multiple Sections:

1.) Let’s create the function which returning UICollectionViewCompositionalLayout and written as :

2. ) Then add the compositional layout to our collection view, add it to the initializer, and written as:

3.) At last, it looks like as:

Handling Compositional Layout with Nested Groups:

1.) Firstly, create the function for UICollectionViewCompositionalLayout as :

2. ) Then add the compositional layout to our collection view as:

3.) At last, run it and it displayed as:


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