我正在尝试开发一个带有粘性导航栏的主题，但问题是wordpress的管理栏覆盖了我的粘性导航栏，它是使用bootstrap制作的。请帮忙。这是我的导航条形码：

<!-- Fixed navbar -->
    <nav class="navbar navbar-custom navbar-fixed-top" id="nav-nav">
      <div class="container">

          <a class="navbar-brand" href="#"><?php bloginfo(\'name\');?> </a>

        <div id="menu" class="navbar-collapse collapse">
          <ul class="nav navbar-nav">
           <?php
            wp_nav_menu( array(
                \'menu\'              => \'primary\',
                \'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())
            );
        ?>
          </ul>
            <!-- search form-->
            <i class="fa fa-search search-top"></i>
                  <div class="search-form-top">
                     <?php get_search_form(); ?>
                 </div>
        </div><!--/.nav-collapse -->
      </div>
    </nav>