You want to be able to display hierarchical data in a table view.

Use the indentation functionality of table view cells:

- (UITableViewCell *)tableView:(UITableView *)tableView
         cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell* result = nil;
  
  static NSString *MyCellIdentifier = @"SimpleCells";
  
  result = [tableView dequeueReusableCellWithIdentifier:MyCellIdentifier];
  
  if (result == nil){
    result = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
                                    reuseIdentifier:MyCellIdentifier];
  }
  
  result.textLabel.text = [NSString stringWithFormat:@"Section %ld, Cell %ld",
                           (long)indexPath.section,
                           (long)indexPath.row];
  
  result.indentationLevel = indexPath.row;
  result.indentationWidth = 10.0f;
  
  return result;
  ....