Add UIView to reused UITableViewCell? - ios

Question

I am desperately trying to achieve the following effect: I have got a tableview where I would like to expand the cells on selection and show some additional information on it. I reuse table cells, just FYI. In the past I was able to achieve such an effect in another application, but this just does not seem to work for me at all. All the methods that are vital for this to happen are called and the row expands beautifully, but the additionalInfo table in the showExpandedContents method just will not appear!
If I create the additionalInfo table in the initialisation of the cell, the table will appear but when I then try to load the data (and by that, also the cells) it just won't reload the table.
But the method that is responsible for this (showExpandedContents) table is definitely called.
If I initialise AND set up the table in the initialisation code of the cell everything works fine.
So here is some code for you:
Here is the cell setup:
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *cellID = #"MyCustomCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID];
if(cell == nil){
cell = [[MyCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellID];
}
((MyCustomCell*)cell).data = [arrayToDisplay objectAtIndex:indexPath.row];
return cell;
}
Here is the selection method:
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
[tableView scrollToRowAtIndexPath:indexPath atScrollPosition:UITableViewScrollPositionTop animated:YES];
//setting the current cell as the expandedRow, so that I can collapse it later
expandedRow = [tableView cellForRowAtIndexPath:indexPath];
[((MyCustomCell*)expandedRow) showExpandedContents];
[tableView beginUpdates];
[self changeRowHeightAtIndex:indexPath.row height:330];
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
[tableView endUpdates];
}
Here is the -showExpandedContents method in MyCustomCell where I would like to display the additional information:
-(void)showExpandedContents{
additionalInfo = [[UITableView alloc] initWithFrame:CGRectMake(0, 80, self.frame.size.width, 250)];
[additionalInfo loadContent];
additionalInfo.backgroundColor = UIColorFromRGB(0xf9f9f9, 1.0);
additionalInfo.layer.zPosition = MAXFLOAT;
[self.contentView addSubview:additionalInfo];
}

Answer 1

Looks like your
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
is giving you a fresh cell, different than the one that had showExpandedContents called.
Removing this line should fix the problem.