UITableView grouped section footer not updating after reload

Question

I have 3 or 2 sections (depending on datasource), in my grouped UITableView. I am trying to reload the last section via:

dispatch_async(dispatch_get_main_queue()         


        

Answer 1

In order to add new rows to a section, you must use the insertRowsAtIndexPaths rather than just adding new objects to data source and reloading a section.

Here's the code:

NSMutableArray *newCommentsIndexPath = [[NSMutableArray alloc] init];

                for (NSInteger i = currentCount; i < (_postDetailDatasource.commentsFeedInfo.allCommentsArray.count + serverComments.count); i ++)
                {
                    NSIndexPath *idxPath = [NSIndexPath indexPathForRow:i inSection:sectionNumber];

                    [newCommentsIndexPath addObject:idxPath];
                }

                [_postDetailDatasource.commentsFeedInfo.allCommentsArray addObjectsFromArray:serverComments];

                [feedDetailTB beginUpdates];

                [feedDetailTB insertRowsAtIndexPaths:newCommentsIndexPath withRowAnimation:UITableViewRowAnimationFade];

                [feedDetailTB endUpdates];

Answer 2

You should implement "isTheLastSection" according to your logic

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {
    if (isTheLastSection) {
         return 40;
    }
    return 0;
}