导航菜单需要定制助行器。
基本上，您可以添加一个参数\'walker\' 到wp_nav_menu() 选项并调用增强类的实例：
wp_nav_menu(
array (
\'menu\' => \'main-menu\',
\'container\' => FALSE,
\'container_id\' => FALSE,
\'menu_class\' => \'\',
\'menu_id\' => FALSE,
\'depth\' => 1,
\'walker\' => new Description_Walker
)
);
班级
Description_Walker 扩展
Walker_Nav_Menu 并更改功能
start_el( &$output, $item, $depth, $args ) 寻找
$item->description.
一个基本示例：
/**
* Create HTML list of nav menu items.
* Replacement for the native Walker, using the description.
*
* @see https://wordpress.stackexchange.com/q/14037/
* @author fuxia
*/
class Description_Walker extends Walker_Nav_Menu
{
/**
* Start the element output.
*
* @param string $output Passed by reference. Used to append additional content.
* @param object $item Menu item data object.
* @param int $depth Depth of menu item. May be used for padding.
* @param array|object $args Additional strings. Actually always an
instance of stdClass. But this is WordPress.
* @return void
*/
function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 )
{
$classes = empty ( $item->classes ) ? array () : (array) $item->classes;
$class_names = join(
\' \'
, apply_filters(
\'nav_menu_css_class\'
, array_filter( $classes ), $item
)
);
! empty ( $class_names )
and $class_names = \' class="\'. esc_attr( $class_names ) . \'"\';
$output .= "<li id=\'menu-item-$item->ID\' $class_names>";
$attributes = \'\';
! empty( $item->attr_title )
and $attributes .= \' title="\' . esc_attr( $item->attr_title ) .\'"\';
! empty( $item->target )
and $attributes .= \' target="\' . esc_attr( $item->target ) .\'"\';
! empty( $item->xfn )
and $attributes .= \' rel="\' . esc_attr( $item->xfn ) .\'"\';
! empty( $item->url )
and $attributes .= \' href="\' . esc_attr( $item->url ) .\'"\';
// insert description for top level elements only
// you may change this
$description = ( ! empty ( $item->description ) and 0 == $depth )
? \'<small class="nav_desc">\' . esc_attr( $item->description ) . \'</small>\' : \'\';
$title = apply_filters( \'the_title\', $item->title, $item->ID );
$item_output = $args->before
. "<a $attributes>"
. $args->link_before
. $title
. \'</a> \'
. $args->link_after
. $description
. $args->after;
// Since $output is called by reference we don\'t need to return anything.
$output .= apply_filters(
\'walker_nav_menu_start_el\'
, $item_output
, $item
, $depth
, $args
);
}
}
或者，或者
as @nevvermind commented, 您可以继承父级的所有功能
start_el 函数，只需将描述附加到
$output:
function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 )
{
parent::start_el( $output, $item, $depth, $args );
$output .= sprintf(
\'<i>%s</i>\',
esc_html( $item->description )
);
}
示例输出：
现在启用中的描述字段wp-admin/nav-menus.php 获取编辑此字段的功能。如果你没有WP，只需将你的完整帖子内容放入其中即可。
进一步阅读：
就是这样。
