cannot handle click close or open

[thangk48cc]

in Lib don't have delegate to know. 1 header is close or open.
i must add Notification Center to handle it

• (void)toggleSection:(NSUInteger)sectionIndex animated:(BOOL)animated
  {
  if (sectionIndex >= [self.sectionsStates count])
  {
  return;
  }

  BOOL sectionIsOpen = [[self.sectionsStates objectAtIndex:sectionIndex] boolValue];

  if (sectionIsOpen)
  {
  NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@"%lu",(unsigned long)sectionIndex],@"sectionIndex",@"0",@"status", nil];

  [[NSNotificationCenter defaultCenter] postNotificationName:@"chooseSection" object:nil userInfo:dic];
  [self closeSection:sectionIndex animated:animated];
  

  }
  else
  {
  NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:[NSString stringWithFormat:@"%lu",(unsigned long)sectionIndex],@"sectionIndex",@"1",@"status", nil];

  [[NSNotificationCenter defaultCenter] postNotificationName:@"chooseSection" object:nil userInfo:dic];
  
  [self openSection:sectionIndex animated:animated];
  

  }
  }