iphone - Scrolling two UITableViews together

Question

I have a weird design case in which to implement I need to place two UITableViews on the same view. I would just use sections, but I need an index on the second table.

I'd like them to both scroll together like they were actually two sections of the same table view. Is this possible?

Here's a basic mockup illustrating why:

As far as I understand it, you cannot move the index. Also, when you add an index to a table, it appears over the entire tableview, not just one section.

If I have to implement this as two table views, they both need to scroll as if they were one. If it's possible to do this using sections, that's even better.

Answer 1

Update

After seeing your update my old answer is not very good but I'll leave my previous answer for anyone else who wants it.

New answer - It depends how you want the tables sync'd.

If you know

1. Which cells are in the top 5
2. How tall each cell is
3. The offset the table view

Then you can calculate which cell is visible at the top of the top 5 table. You can use this information to scroll the bottom table to the correct index.

---

Old answer

I'm with the other guys not sure why you would want to or if I am misinterpreting but it's pretty simple.

UITableView is a subclass of UIScrollView so you can set yourself as the UITableViewDelegate and override

- (void)scrollViewDidScroll:(UIScrollView *)scrollView;
{
    UITableView *slaveTable = nil;

    if (self.table1 == scrollView) {
        slaveTable = self.table2;
    } else if (self.table2 == scrollView) {
        slaveTable = self.table1;
    }

    [slaveTable setContentOffset:scrollView.contentOffset];
}

This gives me something that looks like this:

The top UITableView is self.table1 and the bottom is self.table2 if either table is scrolled the scrolling is mirrored in the other table.