Swift 4 UICollectionView detect end of scrolling

Question

I have an Horizontal UICollectionView on my app and I want to load more data when the user reaches the end (or nearly to the end) of UICollectionView w

Answer 1

You may use cellForItem or willDisplayItem methods of collection view. Check if the last cell is being displayed, and load your data. For example:

Swift:

func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) {
     if (indexPath.row == dataSource.count - 1 ) { //it's your last cell
       //Load more data & reload your collection view
     }
}

Objective-C:

- (void)collectionView:(UICollectionView *)collectionView willDisplayCell:(UICollectionViewCell *)cell forItemAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.row == dataSource.count - 1 ) { //it's your last cell
       //Load more data & reload your collection view

    }
}