layui_toolnb/layuiadmin/pro/dist/views/app/forum/replysform.html

<form class="layui-form" lay-filter="layuiadmin-app-forum-reply" style="padding: 20px 30px 0 0;">
  <div class="layui-form-item">
    <label class="layui-form-label">回帖内容</label>
    <div class="layui-input-block">
      <textarea name="content" lay-verify="required" autocomplete="off" class="layui-textarea" style="height: 220px;"></textarea>
    </div>
  </div>
  <div class="layui-form-item">
    <label class="layui-form-label"></label>
    <div class="layui-input-inline">
      <input type="button" lay-submit lay-filter="layuiadmin-app-forumreply-submit" value="确认" class="layui-btn">
    </div>
  </div>
</form>

<script>
layui.use(['index', 'form', 'upload'], function(){
  var $ = layui.$
  ,form = layui.form
  ,upload = layui.upload;

  upload.render({
    elem: '#layuiadmin-upload-replys'
    ,url: layui.setter.base + 'json/upload/demo.js'
    ,accept: 'images'
    ,method: 'get'
    ,acceptMime: 'image/*'
    ,done: function(res){
      $(this.item).prev("div").children("input").val(res.data.src)
    }
  });
})
</script>