UITableView Detecting Last Cell

Question

How can I detect when a UITableView has been scrolled to the bottom so that the last cell is visible?

Answer 1

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
    NSInteger lastSectionIndex = [tableView numberOfSections] - 1;
    NSInteger lastRowIndex = [tableView numberOfRowsInSection:lastSectionIndex] - 1;
    if ((indexPath.section == lastSectionIndex) && (indexPath.row == lastRowIndex)) {
        // This is the last cell
    }
}

Answer 2

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.

Answer 3

For Xcode 9 and Swift 4/5

//Show Last Cell (for Table View)
func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) 
{
    if indexPath.row == (yourdataArray.count - 1) 
    {
        print("came to last row")
    }
}

//Show last cell (for Collection View)
func collectionView(_ collectionView: UICollectionView, willDisplay cell: UICollectionViewCell, forItemAt indexPath: IndexPath) 
{
    if indexPath.row == (yourdataArray.count - 1)
    {
        // Last cell is visible
    }
}

Answer 4

Create elegant extension for UITableView:

extension UITableView {

    func isLast(for indexPath: IndexPath) -> Bool {

        let indexOfLastSection = numberOfSections > 0 ? numberOfSections - 1 : 0
        let indexOfLastRowInLastSection = numberOfRows(inSection: indexOfLastSection) - 1

        return indexPath.section == indexOfLastSection && indexPath.row == indexOfLastRowInLastSection
    }
}

Example of usage:

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {

    if tableView.isLast(for: indexPath) {
        //do anything then
    }

    return cell
}

Answer 5

For Xcode 8 and swift 3

func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
        let lastSectionIndex = tableView.numberOfSections - 1
        let lastRowIndex = tableView.numberOfRows(inSection: lastSectionIndex) - 1
        if indexPath.section ==  lastSectionIndex && indexPath.row == lastRowIndex {
            print("this is the last cell")
        }
    }

Answer 6

Implement the tableView:willDisplayCell:forRowAtIndexPath: method in your UITableViewDelegate and check to see if it's the last row.