我想在链接中的 sub-menu
和 b
标签的a
标签中添加一类。
WordPress给我这个代码:
<li id="menu-item-72" class="menu-item menu-item-type-post_type menu-item-object-page dropdown menu-item-72"><a
href="#">Link</a>
<ul class="dropdown-menu"></ul>
我想要这个:
<li id="menu-item-72" class="menu-item menu-item-type-post_type menu-item-object-page dropdown menu-item-72"> <a
href="#" class="dropdown-toggle" data-toggle="dropdown">Link <b class="caret"></b></a>
<ul class="dropdown-menu"></ul>
有人知道解决方案吗?
查看此答案,它解释了如何将自定义html添加到WordPress菜单:https://stackoverflow.com/a/12251157/1627227
编辑:
我汇总了一个示例以适合您的问题。您可以将其放入 functions.php 中。注意评论,他们说明在哪里添加您的自定义代码。
class Custom_Walker_Nav_Menu extends Walker_Nav_Menu {
function start_lvl(&$output, $depth) {
$indent = str_repeat("t", $depth);
//$output .= "n$indent<ul class="sub-menu">n";
// Change sub-menu to dropdown menu
$output .= "n$indent<ul class="dropdown-menu">n";
}
function start_el ( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
// Most of this code is copied from original Walker_Nav_Menu
global $wp_query, $wpdb;
$indent = ( $depth ) ? str_repeat( "t", $depth ) : '';
$class_names = $value = '';
$classes = empty( $item->classes ) ? array() : (array) $item->classes;
$classes[] = 'menu-item-' . $item->ID;
$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args ) );
$class_names = ' class="' . esc_attr( $class_names ) . '"';
$id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args );
$id = strlen( $id ) ? ' id="' . esc_attr( $id ) . '"' : '';
$has_children = $wpdb->get_var("SELECT COUNT(meta_id)
FROM wp_postmeta
WHERE meta_key='_menu_item_menu_item_parent'
AND meta_value='".$item->ID."'");
$output .= $indent . '<li' . $id . $value . $class_names .'>';
$attributes = ! empty( $item->attr_title ) ? ' title="' . esc_attr( $item->attr_title ) .'"' : '';
$attributes .= ! empty( $item->target ) ? ' target="' . esc_attr( $item->target ) .'"' : '';
$attributes .= ! empty( $item->xfn ) ? ' rel="' . esc_attr( $item->xfn ) .'"' : '';
$attributes .= ! empty( $item->url ) ? ' href="' . esc_attr( $item->url ) .'"' : '';
// Check if menu item is in main menu
if ( $depth == 0 && $has_children > 0 ) {
// These lines adds your custom class and attribute
$attributes .= ' class="dropdown-toggle"';
$attributes .= ' data-toggle="dropdown"';
}
$item_output = $args->before;
$item_output .= '<a'. $attributes .'>';
$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
// Add the caret if menu level is 0
if ( $depth == 0 && $has_children > 0 ) {
$item_output .= ' <b class="caret"></b>';
}
$item_output .= '</a>';
$item_output .= $args->after;
$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
}
}
将其固定到位后,您必须转到菜单(wp_nav_menu()
)的点。在我链接到的答案中,有完整的函数调用wp_nav_menu
。但是,您必须添加此行:'walker' => new Custom_Walker_Nav_Menu
到参数数组中,以在该特定菜单上使用自定义Walker对象。
希望你得到;)
由于WordPress 3.6.0您可以使用NAV_MENU_LINK_ATTRIBUTES过滤器:
add_filter( 'nav_menu_link_attributes', 'add_class_to_items_link', 10, 3 );
function add_class_to_items_link( $atts, $item, $args ) {
// check if the item has children
$hasChildren = (in_array('menu-item-has-children', $item->classes));
if ($hasChildren) {
// add the desired attributes:
$atts['class'] = 'dropdown-toggle';
$atts['data-toggle'] = 'dropdown';
$atts['data-target'] = '#';
}
return $atts;
}
不幸的是,标签没有我们可以使用的过滤器,所以我们需要一个沃克:
class MY_Menu_Walker extends Walker_Nav_Menu {
public function start_lvl( &$output, $depth = 0, $args = array() ) {
$indent = str_repeat("t", $depth);
$output .= "n$indent<ul class="sub-menu dropdown-menu">n";
}
}
然后在调用菜单时添加Walker选项:
wp_nav_menu( array('walker' => new MY_Menu_Walker));
在function.php
中使用此代码function add_menuclass($ulclass) {
return preg_replace('/<a /', '<a class="list-group-item"', $ulclass);
}
add_filter('wp_nav_menu','add_menuclass');
您可以使用它来检查是否有sub-menu:
$has_children = $wpdb->get_var("SELECT COUNT(meta_id)
FROM wp_postmeta
WHERE meta_key='_menu_item_menu_item_parent'
AND meta_value='".$item->ID."'");
然后进行简单检查
if ( $has_children > 0 ) {
// These lines adds your custom class and attribute
$attributes .= ' class="dropdown-toggle"';
$attributes .= ' data-toggle="dropdown"';
}
记住设置 $ WPDB as Global:
global $wp_query, $wpdb;
tada〜
您可以将其放入functions.php中。
class My_Walker_Nav_Menu extends Walker_Nav_Menu {
function display_element( $element, &$children_elements, $max_depth, $depth=0, $args, &$output ){
$GLOBALS['dd_children'] = ( isset($children_elements[$element->ID]) )? 1:0;
$GLOBALS['dd_depth'] = (int) $depth;
parent::display_element( $element, $children_elements, $max_depth, $depth, $args, $output );
}
function start_lvl(&$output, $depth) {
$indent = str_repeat("t", $depth);
$output .= "n$indent<ul class="dropdown-menu">n";
}
function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 )
{
global $wp_query, $wpdb;
$indent = ( $depth ) ? str_repeat( "t", $depth ) : '';
$li_attributes = '';
$class_names = $value = '';
$classes = empty( $item->classes ) ? array() : (array) $item->classes;
//Add class and attribute to LI element that contains a submenu UL.
if ($args->has_children){
$classes[] = 'dropdown';
$li_attributes .= 'data-dropdown="dropdown"';
}
$classes[] = 'menu-item-' . $item->ID;
//If we are on the current page, add the active class to that menu item.
$classes[] = ($item->current) ? 'active' : '';
//Make sure you still add all of the WordPress classes.
$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args ) );
$class_names = ' class="' . esc_attr( $class_names ) . '"';
$id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args );
$id = strlen( $id ) ? ' id="' . esc_attr( $id ) . '"' : '';
$has_children = $wpdb->get_var(
$wpdb->prepare("
SELECT COUNT(*) FROM $wpdb->postmeta
WHERE meta_key = %s
AND meta_value = %d
", '_menu_item_menu_item_parent', $item->ID)
);
$output .= $indent . '<li' . $id . $value . $class_names .'>';
$output .= $indent . '<li' . $id . $value . $class_names . $li_attributes . '>';
//Add attributes to link element.
$attributes = ! empty( $item->attr_title ) ? ' title="' . esc_attr( $item->attr_title ) .'"' : '';
$attributes .= ! empty( $item->target ) ? ' target="' . esc_attr( $item->target ) .'"' : '';
$attributes .= ! empty( $item->xfn ) ? ' rel="' . esc_attr( $item->xfn ) .'"' : '';
$attributes .= ! empty( $item->url ) ? ' href="' . esc_attr( $item->url ) .'"' : '';
// Check if menu item is in main menu
if ( $depth == 0 && $has_children > 0 ) {
// These lines adds your custom class and attribute
$attributes .= ' class="dropdown-toggle"';
$attributes .= ' data-toggle="dropdown"';
}
$item_output = $args->before;
$item_output .= '<a'. $attributes .'>';
$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;
// Add the caret if menu level is 0
if ( $depth == 0 && $has_children > 0 ) {
$item_output .= ' <b class="caret"></b>';
}
$item_output .= '</a>';
$item_output .= $args->after;
$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
}
}
然后在您的模板中要显示此菜单的位置。
<?php
if ( has_nav_menu( 'primary' ) ) {
$defaults = array(
'theme_location' => 'primary',
//'menu' => '',
'container' => 'ul',
'container_class' => '',
'container_id' => '',
'menu_class' => '',
'menu_id' => '',
'walker' => new My_Walker_Nav_Menu()
);
wp_nav_menu( $defaults );
}
?>
使用此问题,我解决了我的问题。