CollectionView Custom cell Label Disappears on Scroll - swift

Question

I have a custom cell for my collectionview and one of the labels in the cell disappears when I scroll down and back up to the cell again.
Here is my cellForItemAt:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if collectionView == productCollectionView {
if let cell = collectionView.dequeueReusableCell(withReuseIdentifier: Identifiers.ProductCell, for: indexPath) as? ProductCell {
if cartProducts.contains(products[indexPath.item]) {
//this is the product
var product = products[indexPath.item]
//get the index from cartProducts
let index = cartProducts.firstIndex(of: product)
//Get the cartcount and update the product
let cartCount: Int = cartProducts[index!].cartCount
product.cartCount = cartCount
products[indexPath.item] = product
//now set the updated product for cell.product
cell.product = products[indexPath.item]
cell.delegate = self
return cell
} else {
cell.product = products[indexPath.item]
cell.delegate = self
return cell
}
} else
if collectionView == categoryCollectionView{
//...this is another collection and not the collectionView that I have problem with
return cell
}
return UICollectionViewCell()
}
}
And here is what I have in y custom cell for the label that is disappearing when I scroll down and back up to the cell:
class ProductCell: UICollectionViewCell {
var product: Product!
{
didSet {
commonUIUpdate()
}
}
func commonUIUpdate() {
//set the price per amount and its unit
if product.pricePerAmountExist == true {
pricePerAmountLbl.isHidden = false
if let PricePerAmount = formatter.string(from: Double(product.pricePerAmount)/100 as NSNumber) {
let PricePerAmountVoume = Float(String(Double(product.pricePerAmountVolume)/100))?.clean ?? ""
pricePerAmountLbl.text = "\(PricePerAmount)/\(String(describing: PricePerAmountVoume))\(product.pricePerAmountUnit)"
}
} else
if product.pricePerAmountExist == false {
pricePerAmountLbl.isHidden = true
}
}
}
I have the label pricePerAmountLbl.isHidden set to true and false when needed but still I dont understand why its disappearing. When I dont set the hidden status for the label in the custom cell the content of the label gets repeated in all cell which is not right either.
Edit:
I added the following to the cell but still no success the problem is still there
else if product.pricePerAmountExist == false {
pricePerAmountLbl.isHidden = true
} else {
pricePerAmountLbl.isHidden = false
}

Answer 1

You are not handling all cases. Your label stays hidden because it was set hidden in the previous cell. You might want to alter you code to cover for the missing case. Hope it helps:
else if product.pricePerAmountExist == false {
pricePerAmountLbl.isHidden = true
} else {
pricePerAmountLbl.isHidden = false
pricePerAmountLbl.text = "This case was not handled before"
}

Answer 2

There was nothing wrong with my code! The error was happening in storyboard. My label was stored in a stackview and that stackview was stored in another stackview; when I was scrolling and the label would go hidden the stackview height would have gone to zero and it stayed at zero even though I unhide the label.