Detect when UITableView has scrolled to the bottom

Question

Is the following post still the accepted way of detecting when an instance of UITableView has scrolled to the bottom [in Swift], or has it been altered (as in: improved) sin

Answer 1

We can avoid using scrollViewDidScroll and use tableView:willDisplayCell

func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
    if indexPath.section == tableView.numberOfSections - 1 &&
        indexPath.row == tableView.numberOfRows(inSection: indexPath.section) - 1 {
        // Notify interested parties that end has been reached
    }
}

This should work for any number of sections.

Answer 2

try this

 func scrollViewDidScroll(_ scrollView: UIScrollView) {
    let height = scrollView.frame.size.height
    let contentYoffset = scrollView.contentOffset.y
    let distanceFromBottom = scrollView.contentSize.height - contentYoffset
    if distanceFromBottom < height {
        print(" you reached end of the table")
    }
}

or you can find in this way

if tableView.contentOffset.y >= (tableView.contentSize.height - tableView.frame.size.height) {    
    //you reached end of the table
}

Answer 3

In Swift 4

func scrollViewDidScroll(_ scrollView: UIScrollView) {
  let isReachingEnd = scrollView.contentOffset.y >= 0
      && scrollView.contentOffset.y >= (scrollView.contentSize.height - scrollView.frame.size.height)
}

If you implement expandable UITableView/UICollectionView, you may need to check scrollView.contentSize.height >= scrollView.frame.size.height

Answer 4

Swift 3

func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
    if indexPath.row + 1 == yourArray.count {
        print("do something")
    }
}