How to detect UITableView scrolling?

Question

I have UITableView which can contain different number of cells.

So I would like to show top & bottom arrows (like on the picture below) if UITableView has hidden cells on top or bottom and hide them if all UITableView's cell are visible.

enter image description here

I have implemented UIScrollView delegate method to detect UITableView's scrolling:

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{

}

but don't know how to check if first or last cell is not visible.

EDITED

Here is the solution:

        if (self.ingredientsTableView.contentOffset.y<0){
            [ingrUpArrow setHidden:YES];
        }
        else if (self.ingredientsTableView.contentOffset.y == 0) {
            [ingrUpArrow setHidden:YES];
        }
        else if (self.ingredientsTableView.contentOffset.y >= (self.ingredientsTableView.contentSize.height - self.ingredientsTableView.bounds.size.height)) {
            [ingrUpArrow setHidden:NO];
            [ingrDownArrow setHidden:YES];
        }
        else {
            [ingrUpArrow setHidden:NO];
            [ingrDownArrow setHidden:NO];
        }

Yogi Yogi · Accepted Answer · 2013-09-10T09:00:48

There are many useful properties of UItableView which can be used in such cases and tableView.contentOffset.y is one of it. Use it. Also this can be useful.

How to detect UITableView scrolling?

1 Answers