Question

I have some weird behavior on the iPad that I am not getting on the iPhone.

I have a Grouped table view that has sections and headers for the sections, the problem is that on the iPad the top most section’s header is not displayed, when scrolling down the table the sections header appears for a short while just before going of screen.

Before scrolling

http://desmond.imageshack.us/Himg525/scaled.php?server=525&filename=screenshot2012051410074.png&res=landing http://desmond.imageshack.us/Himg525/scaled.php?server=525&filename=screenshot2012051410074.png&res=landing

After scrolling

http://desmond.imageshack.us/Himg59/scaled.php?server=59&filename=screenshot2012051410074.png&res=landing http://desmond.imageshack.us/Himg59/scaled.php?server=59&filename=screenshot2012051410074.png&res=landing

The code for creating the headers of the sections:

- (UIView *) tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section 
{
    NSString *sectionTitle = [self tableView:tableView titleForHeaderInSection:section];
    if (sectionTitle == nil || [sectionTitle isEqualToString:@""]) {
        return nil;
    }

    // Create label with section title
    UILabel *label = [[UILabel alloc] init] ;
    label.frame = CGRectMake(12, 0, 300, 30);
    label.backgroundColor = [UIColor clearColor];
    label.textColor = [UIColor blackColor];
    label.shadowColor = [UIColor whiteColor];
    label.shadowOffset = CGSizeMake(0.0, 1.0);
    label.font = [UIFont boldSystemFontOfSize:16];
    label.text = sectionTitle;

    UIImage *img = [UIImage imageNamed:@"header"];
    UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(10, 0, 300, 44)];
    imgView.image = img;

    UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, tableView.bounds.size.width, 44)];

    [view addSubview:imgView];
    [view addSubview:label];

    return view;
}

-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    int aSection = [[self.sectionsToDisplay objectAtIndex:section] integerValue];
    return [self.groupHeadings objectAtIndex:aSection];
}

My TableView’s code:

tableViewResult = [[UITableView alloc] initWithFrame:mainView.frame style:UITableViewStyleGrouped];

tableViewResult.separatorColor = [UIColor clearColor];
[mainView addSubview:tableViewResult];

I set the delegate and datasource in another method as I first do a web request before loading any data into the table, ie when the web request is done I do:

tableViewResult.delegate = self;
tableViewResult.dataSource = self;
[tableViewResult reloadData];

Everything works as expected except for the header of the top most section, and only on the iPad.

Any ideas what can cause this behavior?

Answer 1

What fixed the issue was changing this function to:

-(NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
    int aSection = [[self.sectionsToDisplay objectAtIndex:section] integerValue];
    if([[self.groupHeadings objectAtIndex:aSection] isEqualToString:@""])
        return nil;
    return [self.groupHeadings objectAtIndex:aSection];
}