Question

I have a UITableView with 3 sections, each returning for numberOfRows the count in 3 separate arrays. In my cellForRow, I need to be able to detect which cell is the first cell in the table and which is the last.

The tricky part is that sometimes a section can return a count of 0 for number of rows, so I’m having a hard time figuring this out. All I’m trying to do is set two flags: isTopCell and isBottomCell. Any ideas?

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 3;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    if(section==0)
        return [array1 count];
    else if(section==1)
        return [array2 count];
    else return [array3 count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

 if(/*something, what I'm trying to figure out*/)
      isTopCell=YES;
 if(/*something, what I'm trying to figure out*/)
      isBottomCell=YES;
}

Edit: Let me clarify. The 3 sections are unified. I want to determine the overall top and bottom cell. if(indexPath.row==0) will return true for 3 sections. I need only 1 winner.

Answer 1

Try this:

int index = indexPath.row;
if (indexPath.section > 0) index += [array1 count];
if (indexPath.section > 1) index += [array2 count];

if (index == 0) // Top row

if (index == [array1 count] + [array2 count] + [array3 count] - 1) // Bottom row