How to disable a UITableView from scrolling up ver

问题:

I'm using EGORefreshTableHeader in conjunction with a static cell (defined in a nib) in a UITableView.

I'd like to be able to scroll the tableview down to trigger the EGORefreshTableHeader and thus refresh the data in the static cell. BUT, as the static cell is sized to fit perfectly in the window, I want to prevent folks from being able to scroll up.

Is there a way to do this?

回答1:

Try this:

CGFloat a;

-(void)scrollViewWillBeginDragging:(UIScrollView *)scrollView
{
    a = scrollView.contentOffset.y;
}

-(void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    if (scrollView.contentOffset.y > a) 
    {
        [scrollView setScrollEnabled:NO];
        [scrollView setContentOffset:CGPointMake(0, a)];
    }
    [scrollView setScrollEnabled:YES];
}