循环中使用ref上传文件/动态ref

有需求是循环中上传文件，选择手动上传，通过设置ref值来获取上传的节点如下，

<el-upload v-if="sign == 'add'|| item.piclist.length<1"
     :ref="'upload'+index"
      :multiple="false"
      :limit="1"
      :action="path"
      :data="item"
      :file-list="postData.list[index].piclist"
      :headers="headers"
      :on-change="handleChange"
      :on-remove="handleRemove"
      :on-success="handleSuccess"
      :on-error="handleError"
      :auto-upload="false">
      <el-button size="mini" slot="trigger" type="primary" plain @click="getIndex(index)">选择文件</el-button>
 </el-upload>

接下来是获取

this.$refs['upload'+this.index].submit()

好的到这就能获取了，因为没有id 所以用index ，有id用id更好一些