Swift - change UICollectionViewCell size

Question

I'm struggling to change the size of my UICollectionViewCell programmatically.

I've tried this:

let columnLayout = FlowLayout(
        itemSize: CGSize(width: 150, height: 150),
        minimumInteritemSpacing: 10,
        minimumLineSpacing: 10,
        sectionInset: UIEdgeInsets(top: 20, left: 20, bottom: 10, right: 20)) 

But that doesn't work for me. Do I have to call this somewhere?

Answer 1

Try

self.collectionView.collectionViewLayout = columnLayout

inside viewDidLoad

lazy var columnLayout:FlowLayout = {
   return FlowLayout(itemSize: CGSize(width:(self.view.frame.width - 40) / 2, height: 150),
    minimumInteritemSpacing: 10,
    minimumLineSpacing: 10,
    sectionInset: UIEdgeInsets(top: 20, left: 20, bottom: 10, right: 20)) 
}()