iOS - UICollectionView spacing still there when set to 0 - How to set with no spacing between cells

Question

I have a simple UICollectionView which I have set with 0 spacing in InterfaceBuilder but when I populate the collection view with cells there is still some spacing. Is there

Answer 1

The documentation for [UICollectionViewFlowLayout minimumInteritemSpacing] mentions:

This spacing is used to compute how many items can fit in a single line, but after the number of items is determined, the actual spacing may possibly be adjusted upward.

You may need to implement a custom layout to do this. The documentation can be found here, and an example here.