Collection View Cells not appearing

Question

I want to display as many collectionViewCells with buttons as there are strings in my array. but when I start the simulator there is just the backgroun

Answer 1

The items in the cell weren't showing up for me because I hadn't set tamic for each of the added subviews when programmatically adding subviews.

subview.translatesAutoresizingMaskIntoConstraints = false