<fieldset class="layui-elem-field" style="width:500px;margin:50px 0 0 300px;">

  <legend>上传回调图片会在这里显示 - 淘素材</legend>

  <div class="layui-field-box">

<div style="width:300px;float:left;">

<img src="" style="max-width:320px;float:left;" id="showimg">

</div>

    <div style="float:left;margin:0 0 20px 30px;">

<button type="button" class="layui-btn" id="test1">

  <i class="layui-icon"></i>上传图片

</button>

</div>

  </div>

</fieldset>

 layui.use(['upload','form'], function(){

   var upload = layui.upload,form = layui.form;

   var uploadInst = upload.render({

     elem: '#test1' //绑定元素

     ,url: 'demo.php' //上传接口

     ,done: function(res){

       $('#showimg').attr('src',res.url);

     }

     ,error: function(){

       layer.msg('上传失败');

     }

   });

 });