Detect the current top cell in a UITableView after scrolling

Question

a simple question but I don\'t seem to have the right terminology to search Stackoverflow by it.

I have a UITableView with no sections, the user can scroll up and do

Answer 1

You could try using UITableView's -indexPathsForVisibleRows or -indexPathForRowAtPoint.

For example, let's say that you want to print the indexPath of the topmost visible cell, when you stop dragging your table. You could do something like this:

- (void)scrollViewDidEndDragging:(UIScrollView *)scrollView willDecelerate:(BOOL)decelerate{
    NSIndexPath *firstVisibleIndexPath = [[self.tableView indexPathsForVisibleRows] objectAtIndex:0];
    NSLog(@"first visible cell's section: %i, row: %i", firstVisibleIndexPath.section, firstVisibleIndexPath.row);
}

For Swift 3.0

let topVisibleIndexPath:IndexPath = self.tableView.indexPathsForVisibleRows![0]