Limit the scroll for UITableView

Question

I have a TableViewController:

As you see I have my own custom bar at t

Answer 1

since UITableView is a subclass of UIScrollView you can use this UIScrollViewDelegate method to forbid scrolling above the top border

- (void)scrollViewDidScroll:(UIScrollView *)scrollView {
    if (scrollView == self.tableView) {
        if (scrollView.contentOffset.y < 0) {
            scrollView.contentOffset = CGPointZero;
        }
    }
}