Question

I am creating a TableView which contains 20 rows.I have to add single labels to the even cells and i have to add two labels at odd cells.When i adding the desired labels and scrolling my table the labels disappars as i go down help me out.

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    // UITableView *cell=[tableView ]
if (cell == nil)
{
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];


    cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
    if(indexPath.row%2==0)
    {
        UILabel *cellLabel=[[UILabel alloc]initWithFrame:CGRectMake(100, 40, 40, 40)]; 
        cellLabel.text=@"o1";
        [cell addSubview:cellLabel];
        [cellLabel release];
    }
    else
    {
        UILabel *cellLabel1=[[UILabel alloc]initWithFrame:CGRectMake(100, 40, 40, 40)]; 
        cellLabel1.text=@"e1";
        [cell addSubview:cellLabel1]; 
        [cellLabel1 release];
        UILabel *cellLabel2=[[UILabel alloc]initWithFrame:CGRectMake(150, 40, 40, 40)]; 
        cellLabel2.text=@"e2";
        [cell addSubview:cellLabel2]; 
        [cellLabel2 release];
    }

}

Answer 1

The two kinds of cells are different, so I would make different cell identifiers for each. Something like:

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *EvenCellIdentifier = @"EvenCell";
    static NSString *OddCellIdentifier = @"OddCell";
    NSString* cellIdentifier = (indexPath.row % 2) == 0 ? EvenCellIdentifier : OddCellIdentifier;

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
    if (cell == nil)
    {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier] autorelease];

        cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
        if(indexPath.row%2==0) 
        {
            UILabel *cellLabel=[[UILabel alloc]initWithFrame:CGRectMake(100, 40, 40, 40)]; 
            cellLabel.text=@"o1";
            [cell addSubview:cellLabel];
            [cellLabel release];
        }
        else
        {
            UILabel *cellLabel1=[[UILabel alloc]initWithFrame:CGRectMake(100, 40, 40, 40)]; 
            cellLabel1.text=@"e1";
            [cell addSubview:cellLabel1]; 
            [cellLabel1 release];
            UILabel *cellLabel2=[[UILabel alloc]initWithFrame:CGRectMake(150, 40, 40, 40)]; 
            cellLabel2.text=@"e2";
            [cell addSubview:cellLabel2]; 
            [cellLabel2 release];
        }
    }

    return cell;
}