CollectionView sizeForItemAtIndexPath never called

Question

This is driving me crazy! I have a UICollectionViewController as shown below:

class PhrasesCompactCollectionViewController: UICollectionViewController
         


        

Answer 1

I had the same problem and nothing would fix it. I had a yellow warning saying to make it private because it came close to another function defined by the Layout Delegate. What fixed it for me was:

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize

Notice the difference from "sizeForItemAtIndexPath" to the correct "sizeForItemAt".

I tore my hair out for days trying to figure this out and it finally worked. Below I will include all of my function to show you how I also "hid" a cell by making the height equal to 0.

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    let findIndex = labelArray.index(of: "\(labelArray[indexPath.row])")
    let screenSize = UIScreen.main.bounds
    let screenWidth = screenSize.width

    if (findIndex! % 2 == 0){
        // Even index, show cell
        return CGSize(width: screenWidth, height: 246)
    }
    else {
        return CGSize(width: screenWidth, height: 0)
    }
}