want to check only one tablecell at a time in TableView

In Below Source Code I am able to change my checkmark object value but at the time of reload data in cellFor RowAtIndexPath method its shows old data //TableView - (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { // Return the number of sections. return 1; }

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:        (NSInteger)section
{

        return [self.tableData count];

}

//CellforRowAt Indexpath showing old table data
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView     dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil)
    {
        cell = [[UITableViewCell alloc]     initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }

    Recipe *obj = nil;



        obj = self.tableData[indexPath.row];
        cell.textLabel.text = obj.name;

        NSLog(@"Reload Data %@", obj.checkmark);
        if ([obj.checkmark integerValue] == 1)
        {
            cell.accessoryType = UITableViewCellAccessoryCheckmark;

        }
        else
        {
            cell.accessoryType = UITableViewCellAccessoryNone;
        }




    return cell;
}


- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

    Recipe *recipe = nil;


        recipe = [self.tableData objectAtIndex:indexPath.row];
        if ([recipe.checkmark integerValue] == 1)
        {

            recipe.checkmark=@"0";
        }
        else
        {

            //recipe.checkmark=@"1";
            for (int i=0; i<[self.tableData count]; i++) {
                if (i==indexPath.row) {
                    recipe.checkmark=@"1";
                }
                else{
                    recipe.checkmark=@"0";
                }

                NSLog(@"PK ! %@", recipe.checkmark);
            }
        }
        //[self.tableData addObject:recipe.checkmark];
        [self.myTable reloadData];


    [self.myTable reloadData];

}