UITableView Detecting Last Cell

I found this solution:

func scrollViewDidScroll(_ scrollView: UIScrollView) {
      let contentOffsetMaxY: Float = Float(scrollView.contentOffset.y + scrollView.bounds.size.height)
      let contentHeight: Float = Float(scrollView.contentSize.height)
      let lastCellIsVisible = contentOffsetMaxY > contentHeight + somePaddingIfWanted
      if lastCellIsVisible {
           doSomething()
      }
}

I had some problems with the willDisplayCell method. This works for me:

func scrollViewDidScroll(_ scrollView: UIScrollView) {
    let y = scrollView.contentOffset.y/(scrollView.contentSize.height - scrollView.frame.size.height)
    let relativeHeight = 1 - (table.rowHeight / (scrollView.contentSize.height - scrollView.frame.size.height))
    if y >= relativeHeight{
        print("last cell is visible")
    }
}

Just pass this in the delegate methods, and change 'table' to your tableView.