引用了avalon.mobile.shim.min.js,在ios中ms-click 事件无效，用ms-on-tap会执行两次

<ul class="mui-table-view mui-grid-view mui-grid-9">
<li ms-repeat="shop_class" class="mui-table-view-cell mui-media mui-col-xs-3 mui-col-sm-3">
<a ms-click="shop_class_ck(el,$index)" href="javascript:void(0)">
<span ms-class="{{el.checked?'color-3':''}}" class="mui-media-body">{{el.gc_name}}</span>
</a>
</li>
</ul>

大神们有没办法解决问题啊