使用此方法試下，本地實測，可用
{eyou:arcview id='field2'}
{eyou:empty name='$field2.image_list' /}
<img src="{$field2.litpic}" alt="" class="img-responsive">
{eyou:else /}
{eyou:volist name="$field2.image_list" id='field3'}
<img src="{$field3.image_url}" alt="" class="img-responsive">
{/eyou:volist}
{/eyou:empty}
{/eyou:arcview}