为tableView iOS中的扩展单元格加载自定义XIB吗？

Question

I am trying to load a expanded cell XIB for a UITableViewCell when it is selected.The content of my normal cell and expanded cell is almost same except for the extra space where I would populate some views in expanded cell.Now to differentiate between the normal cell and expanded cell I have changed the UILabel colors inside the expanded cells to a different color.I am able to load the expanded cell XIB on clicking a cell however the problem is that every cell is getting replaced by expanded cell XIB .The only difference is that the height of clicked cell is more than others .And when I click back the expanded cell, Normal cell XIB 's are loaded again.How can I load the expanded cell XIB only for the clicked cell? Or is there a better way to achieve this thing?

Here's how I am expanding the cell.

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{


if ([self.expandedCells containsObject:indexPath]) {

    [self.expandedCells removeAllObjects];
    isExpanded = NO;
    [self.busTableView beginUpdates];
    [self.busTableView reloadData];
    [self.busTableView endUpdates];

}else{
    isExpanded=YES;

    if (self.expandedCells.count>0) {
        [self.expandedCells removeAllObjects];
    }

    [self.expandedCells addObject:indexPath];
    expCell.expContainer.hidden=YES;

     //Some more code

    [self.busTableView beginUpdates];
    [self.busTableView reloadData];
    [self.busTableView endUpdates];

   }

}

And the cellForRow method looks like this.

  - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

  if (!isExpanded) {   //BOOL variable set to NO in viewDidLoad initially

    BusListCell *cell =(BusListCell*) [tableView dequeueReusableCellWithIdentifier:nil];
    if (cell==nil) {
    NSArray *nibs = [[NSBundle mainBundle]loadNibNamed:@"BusListCell" owner:self options:nil];
        cell = nibs[0];

    }
    cell.busName.text = [[busArray objectAtIndex:indexPath.row]valueForKey:@"operatorName"];

    return cell;

 }else{
      expCell = (ExpandedCell*)[tableView dequeueReusableCellWithIdentifier:nil];
      if (expCell==nil) {
         NSArray *nibs = [[NSBundle mainBundle]loadNibNamed:@"ExpandedCell" owner:self options:nil];
        expCell = nibs[0]; 

       }

       expCell.bus_Name.text = [[busArray objectAtIndex:indexPath.row]valueForKey:@"operatorName"];
       return expCell;

      }

    return nil;
  }

Answer 1

Instead of checking in cellForRowAtIndexPath:

if (!isExpanded) {}

you have to check

if (![self.expandedCells containsObject:indexPath]){}