Stop Single UICollectionView cell Flowing to the centre of the screen

Question

I am trying to understand why Collection View keeps centre aligning just the last cell in a collection.
I have created a simple Flow layout based collection view. I am

Answer 1

In Swift 5

Use UICollectionViewFlowLayout to align cell to left like below

let layout = UICollectionViewFlowLayout()
layout.scrollDirection = .horizontal
self.collectionView.collectionViewLayout = layout