template部分代码，引入upload组件，这里采用自动上传文件

<div class="filesC">       <el-upload         ref="files"         name="imgFile"         class="avatar-uploader"         :with-credentials="true"         :action="action"         :show-file-list="false"         :on-success="handleAvatarSuccess"         :on-error="handleAvatarError"         :before-upload="beforeAvatarUpload">         <img v-if="imageUrl" :src="data:imageUrl" class="avatar">         <i v-else class="el-icon-plus avatar-uploader-icon"></i>       </el-upload>       &nbsp;图片尺寸：141*54</div>

script部分代码，图片上传之前触发 beforeAvatarUpload ，在这里return false 会中断上传操作

beforeAvatarUpload (file) {  let _this = this  if (file.type.indexOf('image')<0) {    this.$alert({message: '图片格式不正确', btn: false})    return false  }  const isLt2M = file.size / 1024 / 1024 < 2;  const isSize = new Promise(function(resolve, reject) {    let width = 141;    let height = 54;    let _URL = window.URL || window.webkitURL;    let img = new Image();    img.onload = function() {      let valid = img.width == width && img.height == height;      valid ? resolve() : reject();    }    img.src = _URL.createObjectURL(file);  }).then(() => {    return file;  }, () => {    _this.$alert({message: '上传的icon必须是等于141*54!', btn: false})    return Promise.reject();  });  return isSize},handleAvatarSuccess (res, file) {  if (res.state==200) {    this.imageUrl = URL.createObjectURL(file.raw);//从文件中读取的本地文件路径，用于显示在img标签里    this.fileUrl = res.data//上传成功后，后台给返回的图片线上路径  }else{    this.$alert({message: '上传失败', btn: false})  }

},handleAvatarError (res, file) {  this.$alert({message: '选择图片失败', btn: false})  /*this.imageUrl = URL.createObjectURL(file.raw);*/},

css代码，修改原组件的样式

.filesC .avatar-uploader .el-upload {  border: 1px solid #aaa;  border-radius: 6px;  cursor: pointer;  position: relative;  overflow: hidden;}.filesC .avatar-uploader .el-upload:hover {  border-color: #409EFF;}.filesC .avatar-uploader-icon {  font-size: 20px;  color: #8c939d;  width: 141px;  height: 54px;  line-height: 54px;  text-align: center;  background: white;}.filesC .avatar {  width: 141px;  height: 54px;  display: block;}