如何在 Joomla 组件(表)中添加可排序的列，ASC 和 DESC 都带有箭头

我已经完成了教程，http://docs.joomla.org/Adding_sortable_columns_to_a_table_in_a_component>

当我按照那里的所有说明进行操作后，我能够对列进行排序，但只有 ASC 方向并且没有箭头指示符.

有谁知道如何同时启用 ASC 和 DESC 以及箭头图形指示器?

非常感谢.

解决方案

在文档中它是这样说的:ASC 就在那里.

公共函数 getListQuery() {$db = JFactory::getDbo();$query = $db->getQuery(true);//...$query->order($db->e​​scape($this->getState('list.ordering', 'default_sort_column')).' '.$db->e​​scape($this->getState('list.direction', 'ASC')));返回 $query;}

I have followed through the tutorial, http://docs.joomla.org/Adding_sortable_columns_to_a_table_in_a_component

When I have followed all instructions there, I was able sort the columns, but with only ASC direction and there is no arrow indicator.

Does anyone happen to know how to enable both ASC and DESC as well as arrow graphic indicator?

Thanks a lot.

解决方案

In the documentation it says something like below: ASC is right there.

public function getListQuery() {
        $db = JFactory::getDbo();
        $query = $db->getQuery(true);

        // ...

        $query->order($db->escape($this->getState('list.ordering', 'default_sort_column')).' '.
                $db->escape($this->getState('list.direction', 'ASC')));

        return $query;
}