CollectionView in the storyboard is overwriting the cell size - ios

Question

I have a collection view that has cells that change size depending on what size the user has selected: Small, medium, large. I have the protocol UICollectionViewDelegateFlowLayout and the delegate function:
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize
The function correctly sets the size of the area needed for the cell but doesn't resize the cell itself.
here is what my view looks like when the cells have been set to the small setting:
Here is the view with the default size:
As you can see the space for the cell changes but the cell size doesn't change.
In the storyboard, whatever the cell size is set to, is what the size will be regardless of what I do in the code. Does anyone know how I can override this:
Any help would be greatly appreciated. Thanks
EDIT
The delegate function is being called. the size is changed on a different page. The size is stored as a value in a singleton, the delegate function decides what size to use based on that value. Here is the delegate function:
func collectionView(_ collectionView: UICollectionView,
layout collectionViewLayout: UICollectionViewLayout,
sizeForItemAt indexPath: IndexPath) -> CGSize {
// if self.collectionView == collectionView {
let viewHeight = collectionView.frame.height
let smallSize = (viewHeight / 4) - 20
let mediumSize = (viewHeight / 2) - 20
let largeSize = viewHeight - 20
switch gridSquareSize {
case .small:
return CGSize(width: smallSize, height: smallSize)
case .standard:
return CGSize(width: mediumSize, height: mediumSize)
case .large:
return CGSize(width: largeSize, height: largeSize)
}
//}
}
EDIT 2:
Here is the function that sets up the cell:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "galleryCell", for: indexPath)
as! GalleryCell
cell.layoutIfNeeded()
switch SettingsModel.instance.currentGridSquareSize {
case .small:
cell.galleryName.font = cell.galleryName.font.withSize(12)
break
case .standard:
cell.galleryName.font = cell.galleryName.font.withSize(24)
break
case .large:
cell.galleryName.font = cell.galleryName.font.withSize(36)
break
}
cell.isHidden = false
cell.background.backgroundColor = UIColor.white
cell.plusIcon.isHidden = true
cell.topLeftImage.isHidden = false
cell.galleryName.textColor = UIColor(red: 45, green: 64, blue: 83, alpha: 1)
cell.topLeftImage.image = UIImage(named: "PlaceholderImage")
cell.delete.isHidden = !isInEditMode
let position = indexPath.row
if position == mGalleriesList.count {
if isInEditMode {
cell.background.backgroundColor = UIColor.darkGray
cell.galleryName.text = "Add new gallery"
cell.galleryName.textColor = UIColor.white
cell.plusIcon.isHidden = false
cell.topLeftImage.isHidden = true
cell.delete.isHidden = true
}
else {
cell.isHidden = true
}
}
else {
let gallery = mGalleriesList[position]
cell.data = gallery
cell.plusIcon.isHidden = true
if let galleryName = gallery.galleryName {
cell.galleryName.text = galleryName
}
var mediaEntries = [MediaEntry]()
for entry in gallery.mediaEntries {
if let deleted = entry.deleted {
if !deleted {
mediaEntries.append(entry)
}
}
else {
mediaEntries.append(entry)
}
}
if mediaEntries.count > 0 {
if let downloadUrl = mediaEntries[0].downloadUrl {
setImage(storageUrl: downloadUrl, imageView: cell.topLeftImage, placeholder: placeholder!, cropToBounds: false)
}
}
}
return cell
}
Here is also a screenshot of the cell inside the storyboard:
Hope this additional information helps