Foundation5 off canvas不能在手机上点击

Question

我无法通过点击我的iPhone来显示画布。我使用了基础相同的代码，但它仍然没有用。

<div class="off-canvas-wrap" data-offcanvas>
<div class="inner-wrap">
<nav class="tab-bar">
<div class="left-small">
<a role="button" aria-expanded="false" aria-controls="idOfLeftMenu" class="left-off-canvas-toggle menu-icon"   ><span></span></a>
</div>
<section class="middle tab-bar-section">
<h1 class="title">lorem</h1> 
</section>
</nav>
<!-- Off Canvas Menu -->
<aside class="left-off-canvas-menu">
    <ul class="off-canvas-list">
    <li></li>
    <li></li>
    <li></li>
    </ul>
</aside>
<!-- close the off-canvas menu -->
<a class="exit-off-canvas"></a>