Why does UICollectionView log an error when the cells are fullscreen?

Question

I have a UICollectionViewController using a UICollectionViewFlowLayout where my itemSize is the size of the UICollectionView

Answer 1

This way had worked for me perfectly!.

I just subtracted the top and bottom insets from the view's height as said in that error.

func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
    return CGSize(width: view.frame.width , height: view.frame.height - (view.safeAreaInsets.top + view.safeAreaInsets.bottom))
}

I hope it helps!