Clicked Header Section is scroll to top

Question

I have the following custom headerview implementation. When user clicks on headerView and it expands to show corresponding cells.

Let\'s imagine I have two sections. An

Answer 1

Since Fade takes about half a second to execute, you will see that flick. What you need to do is either giving a small delay to TableViewScroll, or just using:

[CATransaction begin];
[comboTableView beginUpdates];
[CATransaction setCompletionBlock: ^{
    NSIndexPath *indexPath = [NSIndexPath indexPathForRow:0 inSection:section];

   [comboTableView scrollToRowAtIndexPath:indexPath
                          atScrollPosition:UITableViewScrollPositionTop
                                  animated:YES];
}];
for (int i = 0; i< ((ComboItem*)comboItemsArray[section]).allComboItems.count; i++)
    {
        NSArray* rowsToReload = [NSArray arrayWithObjects:[NSIndexPath indexPathForRow:i inSection:section], nil];
        [comboTableView reloadRowsAtIndexPaths:rowsToReload
                                   withRowAnimation:UITableViewRowAnimationFade];
    }
[comboTableView endUpdates];
[CATransaction commit];