在WordPress中自定义wp-bootstrap-navwalker可以通过以下步骤实现:
<?php
class WP_Bootstrap_Navwalker extends Walker_Nav_Menu {
public function start_lvl(&$output, $depth = 0, $args = array()) {
$indent = str_repeat("\t", $depth);
$output .= "\n$indent<ul class=\"dropdown-menu\">\n";
}
public function start_el(&$output, $item, $depth = 0, $args = array(), $id = 0) {
$indent = ($depth) ? str_repeat("\t", $depth) : '';
$li_attributes = '';
$class_names = $value = '';
$classes = empty($item->classes) ? array() : (array) $item->classes;
$classes[] = ($args->walker->has_children) ? 'dropdown' : '';
$classes[] = ($item->current || $item->current_item_ancestor) ? 'active' : '';
$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) . '"' : '';
$output .= $indent . '<li' . $id . $value . $class_names . $li_attributes . '>';
$attributes = !empty($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) . '"' : '';
$attributes .= ($args->walker->has_children) ? ' class="dropdown-toggle" 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;
$item_output .= ($args->walker->has_children) ? ' <b class="caret"></b></a>' : '</a>';
$item_output .= $args->after;
$output .= apply_filters('walker_nav_menu_start_el', $item_output, $item, $depth, $args);
}
public function display_element($element, &$children_elements, $max_depth, $depth = 0, $args, &$output) {
if (!$element) {
return;
}
$id_field = $this->db_fields['id'];
if (is_object($args[0])) {
$args[0]->has_children = !empty($children_elements[$element->$id_field]);
}
parent::display_element($element, $children_elements, $max_depth, $depth, $args, $output);
}
}
?>
require_once get_template_directory() . '/wp-bootstrap-navwalker/wp_bootstrap_navwalker.php';
function register_my_menu() {
register_nav_menu('primary', 'Primary Menu');
}
add_action('after_setup_theme', 'register_my_menu');
<?php
wp_nav_menu(array(
'theme_location' => 'primary',
'depth' => 2,
'container' => 'div',
'container_class' => 'collapse navbar-collapse',
'container_id' => 'bs-example-navbar-collapse-1',
'menu_class' => 'nav navbar-nav',
'fallback_cb' => 'WP_Bootstrap_Navwalker::fallback',
'walker' => new WP_Bootstrap_Navwalker(),
));
?>
现在,你已经成功地在WordPress中自定义了wp-bootstrap-navwalker。这将允许你使用Bootstrap样式的导航菜单,并根据需要进行自定义。
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