collectionView(_:willDisplay:forItemAt:)
Tells the delegate that the specified cell is about to be displayed in the collection view.
Declaration
optional func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath)Parameters
- collectionView:
The collection view object that is adding the cell.
- cell:
The cell object being added.
- indexPath:
The index path of the data item that the cell represents.
Discussion
The collection view calls this method before adding a cell to its content. Use this method to detect cell additions, as opposed to monitoring the cell itself to see when it appears.