UICollectionViewDataSource cellForItemAt don't run at iOS 14 - swift

Question

The cellForItemAt dont't get called after I updated the build target to iOS 14 in Xcode. However, numberOfItemsInSection is getting called but cellForItemAt don't which makes it weird. I have never seen this before.
Any idea of what it could be?
extension LoginTableCell: UICollectionViewDelegate, UICollectionViewDataSource {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.cells.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "LoginCollectionCell",
return cell
}

Answer 1

I can't see anywhere where you set the cell sizes so be sure your cells content sizes are being setup correctly. If you're using a flow layout you can set the size like this:
let layout = UICollectionViewFlowLayout()
layout.scrollDirection = .vertical
layout.itemSize = CGSize(width: 50, height: 50)
collectionView.collectionViewLayout = layout
Alternatively you can use the UICollectionViewDelegateFlowLayout protocol to return a size for the cell:
extension LoginTableCell: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return self.cells.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "LoginCollectionCell",
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
return CGSize(width: 100, height: 100)
}