拉取特定事件'；事件工具包iPhone iOS中的标题和开始日期

我已经看过苹果的相同代码，但还没有弄明白

我正在尝试从iOS 4.0或更高版本的事件工具包中提取单个事件的标题和开始日期

我已经使用了苹果的EKDemo示例代码，并尝试修改didSelect方法，但每次修改时，应用程序都会失效。有什么想法吗

  - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { 
           // Upon selecting an event, create an EKEventViewController to display the event.
          self.detailViewController = [[EKEventViewController alloc] initWithNibName:nil bundle:nil];           
         detailViewController.event = [self.eventsList objectAtIndex:indexPath.row];

        // Allow event editing.
       detailViewController.allowsEditing = YES;

       //   Push detailViewController onto the navigation controller stack
        //  If the underlying event gets deleted, detailViewController will remove itself from
          //    the stack and clear its event property.
         [self.navigationController pushViewController:detailViewController animated:YES];
    }