Hiding button on tableview on a particular cell - iphone

Question

I have created table. On each cell I am adding button depending upon the value from flag array.
Here is my code for adding button on cell
if ([[self.flags objectAtIndex:indexPath.row]
isEqualToString:#"false"])
{
UIButton *btnFlag = [UIButton buttonWithType:UIButtonTypeCustom];
[btnFlag addTarget:self
action:#selector(flagButtonPressed:)
forControlEvents:UIControlEventTouchDown];
btnFlag.backgroundColor = [UIColor redColor];
[btnFlag setTitle:#"flag" forState:UIControlStateNormal];
btnFlag.frame = CGRectMake(230, 40, 50, 20);
[cell addSubview:btnFlag];
}else if ([[self.flags objectAtIndex:indexPath.row] isEqualToString:#"true"])
{
UIButton *btnFlag = [UIButton buttonWithType:UIButtonTypeCustom];
[btnFlag setHidden:YES];
[cell addSubview:btnFlag];
}
-(void)flagButtonPressed:(id)sender {
UITableViewCell *owningCell = (UITableViewCell*)[sender superview];
indexPathToCell = [self.cotDetailsTbl indexPathForCell:owningCell];
// some stuff }
In the above method Im calling the api and depending upon the response obtained Im replacing the value in flag array from false to true. Once the value in flag array becomes true Im reloading table.
But the problem is when Im reloading table the button still appears its not hidden
Thanks

Answer 1

In your else part you again creating a new instance of button using UIButton *btnFlag = [UIButton buttonWithType:UIButtonTypeCustom] instead you need the existing UIbutton instance and set it to hidden.
Try using the following:
In if statement, assign a tag to each button
btnFlag.tag = indexPath.row
Now. in else do the following find the button by its tag and set hidden :
else if ([[self.flags objectAtIndex:indexPath.row] isEqualToString:#"true"])
{
UIButton *btnFlag = [cell.contentView viewWithTag:indexPath.row];
[btnFlag setHidden:YES];
}