iPad: Iterate over every cell in a UITableView?

for (int section = 0; section < [tableView numberOfSections]; section++) {
    for (int row = 0; row < [tableView numberOfRowsInSection:section]; row++) {
        NSIndexPath* cellPath = [NSIndexPath indexPathForRow:row inSection:section];
        UITableViewCell* cell = [tableView cellForRowAtIndexPath:cellPath];
        //do stuff with 'cell'
    }
}