Question

I have designed tableView through the storyboard, in one cell i have one button & one Label.
button is has tag-1 & Label has tag-2 on the storyboard.in cellForRowAtIndexPath i am accessing these like below

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSLog(@" i am back in cellForRowAtIndexPath");  

    static NSString *CellIdentifier = nil;
   // UILabel *topicLabel;
    NSInteger rows=indexPath.row;
    NSLog(@"row num=%i",rows);
    if (rows % 2==0)
    {
        CellIdentifier=@"LeftTopicCell";
    }
    else
    {
        CellIdentifier=@"RightTopicCell";

    }

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    UIButton *topicButton=(UIButton *)[cell viewWithTag:1];
    UILabel  *topicScoreLabel=(UILabel *)[cell viewWithTag:2];

    NSString *topicNameLabel=[[NSString alloc]init];

    //some logic processing


            topicNameLabel= topicItem.topicTitle;

            [topicButton setTitle:topicNameLabel forState:UIControlStateNormal];
        [topicButton setTag:indexPath.row ];
            [topicButton setTitle:topicNameLabel forState:UIControlStateHighlighted];
            [topicButton addTarget:self action:@selector(topicButtonSelected:) forControlEvents:UIControlEventTouchDown];

        [topicScoreLabel setText:[NSString stringWithFormat:@"%d/%d",correctAnswers,[answerResults count]]];
    }

    return cell;
}

first time it works fine but when i came back to this viewcontroller, i have reloaded this again, but this time for two rows it works well. but for third rows it returns UIButton instead of UILabel for this line UILabel *topicScoreLabel=(UILabel *)[cell viewWithTag:2]; & because of this it is giving exception “unrecognised selector “[UIButton setText]””;

Answer 1

i got answer ,because i am updating button tag through the setTag method in cellForRowAtIndexPath according to row number, it is setting tag to button as number 2 thats why it returning UIButton