changing a customlabel within an expanding UItableviewcell

I created a custom table cell that expands. When it expands, it shows a UILabel along with two UIButtons. The UILabel should show data from the backend. I created the customLabel in the CustomCell interface file. Then I imported the CustomCell class into my InboxTableViewController, and implemented the custom cell. The label only appears when the cell is tapped, and expands. How would I go about changing the UILabel, because cell.customLabel.text, would not work here, since it is not a property of the cell. Here is the associated code:

CustomCell.h


@interface CustomCell : UITableViewCell
{
UIImage *userImage;
UILabel *userName;

//below widgets will display when user tapped
  @public
UIButton *leftButton, *rightButton;
UILabel *customLabel;
BOOL userTapped;
}
@property (weak, nonatomic) IBOutlet UILabel *userName;

@property (weak, nonatomic) IBOutlet UIImageView *userImage;



- (void) setData:(NSDictionary*) d;

@end

and here is the inboxviewcontroller.m where i try to implement the customcell along with the customLabel.

:
 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath  *)indexPath
{
 static NSString *CellIdentifier = @"Cell";
CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
if (!cell) {
    cell = [[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
 //  PFObject *message = [self.messages objectAtIndex:indexPath.row];

PFObject *message = [self.messages objectAtIndex:indexPath.row];

cell.userName.text = [message objectForKey:@"from"];
//cell.userImage.image = [message objectForKey:@"image1"];
cell.customLabel.text =  [message objectForKey:@"message"];

return cell;}