How to adjust height of UICollectionView to be the height of the content size of the UICollectionView?

Question

I would like the UICollectionView (The red one) to shrink to the height of the content size in this case UICollectionViewCells(the yellow ones) because there is a lot of emp

Answer 1

On your UICollectionView set your constraints such as Trailing, Leading, and Bottom:

If you look at my height constraint in more detail, as it is purely for storyboard look so I don't get errors, I have it to Remove at build time. The real height constraint is set in my code down below.

My code for DrawerCollectionView, which is set as the collection view Custom Class:

import UIKit

class DrawerCollectionView: UICollectionView {

    override func didMoveToSuperview() {
        super.didMoveToSuperview()

        heightAnchor.constraint(equalToConstant: contentSize.height).isActive = true
    }
}