UICollectionView extension to programmatically scroll to last item in the CollectionView (using datasource instead of scrollToVisibleRect).

UICollectionView+scrollToBottom.swift

import UIKit

extension UICollectionView {

    // MARK: - UICollectionView scrolling/datasource

    /// Last Section of the CollectionView
    var lastSection: Int {
        return numberOfSections - 1
    }

    /// IndexPath of the last item in last section.
    var lastIndexPath: IndexPath? {
        guard lastSection >= 0 else {
            return nil
        }

        let lastItem = numberOfItems(inSection: lastSection) - 1
        guard lastItem >= 0 else {
            return nil
        }

        return IndexPath(item: lastItem, section: lastSection)
    }

    /// Islands: Scroll to bottom of the CollectionView
    /// by scrolling to the last item in CollectionView
    func scrollToBottom(animated: Bool) {
        guard let lastIndexPath = lastIndexPath else {
            return
        }
        scrollToItem(at: lastIndexPath, at: .bottom, animated: animated)
    }
}

I don't understand how we can use it🤔 self.collectionView.scrollToBottom(animated: true) - Value of type 'UICollectionView' has no member 'scrollToBottom'

I don't understand how we can use it🤔 self.collectionView.scrollToBottom(animated: true) - Value of type 'UICollectionView' has no member 'scrollToBottom'

Placed DispatchQueue.main.async { self.collectionView.scrollToBottom(animated: false) } inside my api call after reloading my collectionView and it works like a charm

or you can use the scrollView methods setContentOffset(CGPoint(x:0 , y: contentSize), animated: true)