javascript - Meterializecss- Wordpress 下拉导航

Question

我显示 WordPress 菜单项但不显示下拉菜单。如何显示下拉菜单？

函数.php

register_nav_menus( array(
'primary' => __( 'Primary Menu', 'TNCTR-OnePage' ),) );

Header.php

 <div class="navbar-fixed">
<nav class="navbar-tp">
  <div class="nav-wrapper">
  <div class="container">
    <a href="<?php bloginfo('url'); ?>" class="brand-logo logo"></a>

     <?php
    wp_nav_menu(array(
      'menu'       => 'primary',
      'menu_class' => 'right hide-on-med-and-down'

    ));
  ?>
 <?php
    wp_nav_menu(array(
      'menu'       => 'primary',
      'menu_class' => 'side-nav',
      'menu_id' => 'mobilemenu',
      'items_wrap'      => '<ul id="slide-out" class="%2$s">%3$s</ul>'  
    ));
  ?>
  <a href="#" data-activates="slide-out" class="button-collapse"><i class="mdi-navigation-menu"></i></a>
    </div>
  </div>
</nav>

HTML 版本。 http://pasted.co/b2fc8b68

Answer 1

您似乎没有分配主题位置？ https://codex.wordpress.org/Function_Reference/wp_nav_menu