element-ui的el-upload组件上传单张图，不显示图片列表。_element file-list不显示图片啊

element-ui的el-upload组件上传单张图，不显示图片列表。

需求：
1.显示单张图片，不需要图片列表
2.可预览图片，删除图片重新上传

环境
1.element-ui
2. vue3.0

实现效果：

---

1.test.vue 代码

<template>
  <div >
    <div class="myload">
      <el-upload
        ref="picUpload"
        action="/admin/test/imgupload/1"      //上传的api
        :headers="header"
        :show-file-list="false"
        class="avatar-uploader"
        :on-success="uploadsucess">
        <img v-if="imgUrl!=''" :src="imgUrl" class="avatar">
        <span v-if="imgName!=''" class="el-upload-action">
                    <i class="el-icon-zoom-in" style="margin-right: 15px"
                       @click.stop="handlePictureCardPreview()"></i>
                    <i class="el-icon-delete"
                       @click.stop="handleRemove()"></i>
                </span>
        <i  class="el-icon-plus avatar-uploader-icon"></i>
      </el-upload>
    </div>
    <el-dialog :visible.sync="dialogVisible" :append-to-body="true">
      <img width="100%" :src="dialogImageUrl" alt="">
    </el-dialog>
  </div>
</template>

<script>
  import store from "@/store";
  import { imgDelete} from '@/api/test'  

  export default {
    name: "test",
    data(){
      return {
        header: {
          Authorization: "Bearer " + store.getters.access_token,
        },
        imgUrl:'',//图片地址
        imgName:'',//图片名称
        dialogVisible:false, //预览图片窗口
        dialogImageUrl:'',   //预览地址
      }
    },
    methods:{

      //图片删除,imgDelete为删除的api,后台接收到参数则删除
      handleRemove() {
        imgDelete(this.imgName).then(res => {
          this.$message.success('删除成功');
          this.imgUrl = ''
          this.imgName = ""
        }).catch(e => {
          this.$message.error('删除失败');
        });
      },

      //图片预览
      handlePictureCardPreview() {
        this.dialogImageUrl = this.imgUrl;
        this.dialogVisible = true;
      },

      //图片上传成功,res为后台上传成功返回的回显参数
      uploadsucess(res, file, fileList) {
        this.imgUrl = res.data.url  
        this.imgName = res.data.name
        this.$message.success("图片上传成功")
      },
    }
  }
</script>
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---

css

<style scoped >
  .myload{
    width: 205px;
    height: 105px;
    overflow: hidden;
  }

  img{
    border: 1px dashed #ccc;
    margin-top: 1px;
  }

  .avatar-uploader {
    padding: 2px 0 0 0;
    cursor: pointer;
    position: relative;
    background-size: 95% 95%;
  }

  .avatar {
    position: relative;
    width: 200px !important;
    height: 100px !important;
    line-height: 100px !important;
    display: block;
  }
  
  .myload /deep/ .avatar-uploader-icon {
    font-size: 28px !important;
    color: #8c939d !important;
    width: 200px !important;
    height: 100px !important;
    line-height: 100px !important;
    text-align: center !important;
    background-color: #fbfdff;
    border:1px dashed #ccc;
  }
  
  .el-upload-action {
    position: absolute;
    top: 0;
    left: 0;
    display: block;
    width: 200px;
    height: 100px;
    font-size: 0;
    color: #fff;
    text-align: center;
    line-height: 100px;
  }
  .el-upload-action:hover {
    font-size: 20px;
    margin-top: 4px;
    margin-left: 2px;
    background-color: #000;
    background-color: rgba(0, 0, 0, .4)
  }
  .img-error {
    width: 200px;
    height: 100px;
    line-height: 100px;
    background-color: rgb(245, 247, 250);
  }
</style>
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---

3.总结

1.利用overflow属性对其他元素进行隐藏。
2.通过研究，对css的理解有进一步的提升。
3.研究仅用于学习，方法老套，期待新方法