1、运用场景

image.png

<el-form-item label="主相册：" prop="picAddressList">
                <span class="advice-size">建议尺寸: 750 * 500</span>
            <el-upload class="avatar-uploader-multi" accept="image/*" :file-list="picAddressList" :headers="myHeaders" :action="api/uploadImage`" list-type="picture-card"  :on-preview="handlePictureCardPreview" :on-success="(response, file) => handlePictureCardSuccess(response, file)" :on-remove="handleRemove" :before-upload="beforeUpload" multiple>
              <i class="el-icon-plus avatar-uploader-icon"></i>
            </el-upload>
            <el-dialog :visible.sync="dialogVisible">
              <img width="100%" :src="dialogImageUrl" alt="">
            </el-dialog>
          </el-form-item>
// 主相册
      handlePictureCardSuccess (response, file) {
        // console.log执行了三次
        if(response.code == 1) {
        this.picAddressList.push({
          "url": global.imgPath + response.data.url
        })
          this.formData.picAddressList.push(response.data.url)
        }
        // console.log执行了一次
      },

• 原本单图上传的配置上加了multiple属性，选择3个图片文件后，一次性请求了3次接口，图片却只增加了一张，中间出现了三张闪一下又只剩一张了
• 排查代码是this.picAddressList.push的过程中只执行了最后一次push，进一步改造上传push处理应该能解决
• 翻阅了Element的上传api，找到了多图上传的相应方法，需要后端配合提供一个多图上传的接口

2、实现代码

<template>
  <div>
  <el-upload
     :multiple="multiple"
     :headers="myHeaders"
     action="api/uploadImage"
     list-type="picture-card"
     :auto-upload="false"
     :http-request="uploadFile"
     ref="upload"
     :on-preview="handlePictureCardPreview"
    >
      <i class="el-icon-plus"></i>
  </el-upload>
  <el-dialog :visible.sync="dialogVisible">
    <img width="100%" :src="dialogImageUrl" alt="">
  </el-dialog>
  <el-button @click="subPicForm">提交上传</el-button>
</div>
</template>
<script>

import axios from 'axios'
export default {
  data(){
    return {
        formDate:"",
        dialogVisible: false,
        dialogImageUrl: '',
    }
 },
 methods:{
    uploadFile(file){
  this.formDate.append('file', file.file);
},
subPicForm(){
  this.formDate = new FormData()
  console.log(this.formDate)
  this.$refs.upload.submit();
  let config = {
      headers: {
          'Content-Type': 'multipart/form-data',
          'x-access-token': 'token'
      }
  }
  console.log(this.formDate,config)
  axios.post(`api/uploadImage`, this.formDate,config).then( res => {
      console.log(res)
  }).catch( res => {
      console.log(res)
  })
}
  }
}

image.png

image.png