提示：记录项目中遇到的问题，仅供参考

前言

项目需求是在表格中嵌套一个上传图片的功能，并且回显选择的图片和已上传的图片，再通过点击操作列中上传按钮才开始上传，使用的方法是实际是通过表单上传实现的

一、vue代码

这里就只展示主要代码，对elementui的函数方法不熟系的，可以对照elementui文档来理解

提示：下面的 scope.row.status 是指状态，为 9 时才可以上传图片，为 0 时图片已经上传

<template><el-table v-loading="loading" :data="formRefundRecordList" v-if="showTable"><div slot="empty" style="text-align: left;">暂无数据</div><el-table-column label="退充截图" align="center" prop="screenshot" :key="Math.random()" width="150px"><template slot-scope="scope"><el-upload :class="{hideUpload:dialogImageUrls[`i${scope.row.id}`] != null}":action="upData.host" :ref="`reScreenshot${scope.row.id}`" :limit="1":accept="accept.join(',')" :auto-upload="false" list-type="picture-card":on-preview="(file)=>{return handlePreview(file, scope.row.id)}":on-remove="(file,fileList)=>{return handleRemove(file, fileList, scope.row.id)}":on-change="(file,fileList)=>{return handleChange(file, fileList, scope.row.id)}"v-if="scope.row.status == 9"><i class="el-icon-plus"></i></el-upload><!-- 上传成功后图片预览 --><!-- src 为图片预览前显示的内容 --><!-- preview-src-list 为图片预览时显示的内容 --><el-image v-if="dialogImageUrls[`i${scope.row.id}`] != null && scope.row.status != 9"class="hideUpload" :src="dialogImageUrls[`i${scope.row.id}`]":preview-src-list="[dialogImageUrls[`i${scope.row.id}`]]"></el-image></template></el-table-column><el-table-column label="操作" align="center" class-name="small-padding fixed-width" fixed="right"width="200px"><template slot-scope="scope"><el-button size="mini" type="text" @click="UpdateStatus(scope.row, 0)" :disabled="scope.row.status != 9">通过</el-button></template></el-table-column></el-table><!-- 上传前图片预览 --><el-image-viewer v-if="showViewer" :on-close="closeViewer" :url-list="srcList" />
<template>
<script>import { updateFormRefundRecord, getOssPolicy, uploadOss } from "@/api/bol/refundInternalMedia";import SparkMD5 from "spark-md5";import ElImageViewer from 'element-ui/packages/image/src/image-viewer';export default {name: "refundInternalMedia",components: { ElImageViewer },data() {return {// 图片详情放大列表（上传前）srcList: [],// 图片详情放大是否显示showViewer: false,// 上传前文件列表fileList: {},// 上传成功后回显时文件的域名（例：https://xxxxxx.xxxx.com）fileDominName: process.env.VUE_APP_File_SHOW_DOMAIN_NAME,// 上传截图携带的参数(实际上不需要这个，但没有又会报错)upData: {host: ''},// 允许上传截图的格式accept: ['.png', '.jpg', '.jpeg'],// 截图弹窗显示与隐藏dialogVisibles: {},// 截图文件路径(表格所有的)dialogImageUrls: {},// 表格显示showTable: true,// 遮罩层loading: true,// 表格数据formRefundRecordList: [],}},methods: {// 关闭图片放大(上传前的)closeViewer() {this.srcList = [];this.showViewer = false;},// 删除截图的事件handleRemove(file, fileList, id) {this.$set(this.dialogImageUrls, `i${id}`, null)this.$delete(this.fileList, `f${id}`)// 刷新表格this.showTable = falsethis.showTable = true},// 点击已上传的截图时的事件handlePreview(file, id) {this.srcList = [file.url];this.showViewer = true;},// 截图状态改变时的钩子，添加文件、上传成功和上传失败时的事件handleChange(file, fileList, id) {this.$set(this.dialogImageUrls, `i${id}`, file.url)this.$set(this.fileList, `f${id}`, file.raw)// 刷新表格this.showTable = falsethis.showTable = true},// 上传截图async uploadFile(file, id) {// 文件md5值let md5await this.fileMd5(file).then((res) => {md5 = res})// 文件后缀名var suffix = file.name.substring(file.name.lastIndexOf(".")); //.xxx// 上传oss的文件名let fileName = md5 + suffix// 生成一个以年月作为文件夹名(例：'20230703/')let fileDirName = this.getDirName()// 存放文件的路径（放到bol项目文件夹下的 refundScreenshot 退款截图文件夹下）let filePath = 'bol/refundScreenshot/' + fileDirName + '/'// 限制允许上传文件类型if (!this.accept.includes(suffix)) {this.$message.warning('上传文件格式有误，请检查后重新上传。')return false}getOssPolicy({}).then((res) => {// 拿到签名信息后，组装表单数据，作参考，具体的字段找后台要let config = res.datalet fd = new FormData()fd.append('key', filePath + fileName)fd.append('success_action_status', '200')fd.append('x-oss-object-acl', 'public-read')fd.append('x-oss-meta-fullname', fileName)fd.append('OSSAccessKeyId', config.accessid)fd.append('policy', config.policy)fd.append('signature', config.signature)fd.append('file', file)if (config.host.indexOf('http:') > -1) {var protocol = window.location.protocol || 'http:'var subUrl = config.host.substring(5, config.host.length)config.host = protocol + subUrl}// 组装请求参数let pre = {url: config.host,data: fd}uploadOss(pre).then(() => {// 组装数据let data = {id: id,screenshot: filePath + fileName,status: 0}// 执行通过updateFormRefundRecord(data).then((res) => {this.getList();this.$modal.msgSuccess("成功通过");}).catch(() => {this.$message.error(res.msg);})}).catch(err => {this.$message.warning('图片上传失败')})}).catch((err) => {this.$message.warning('验签获取失败')})},// 生成一个以年月为文件名的字符getDirName() {var date = new Date();var year = date.getFullYear();var month = date.getMonth() + 1;if (month >= 1 && month <= 9) {month = "0" + month;}var DirName = year + '' + month;return DirName;},// 返回文件md5值async fileMd5(file) {var fileReader = new FileReader();var spark = new SparkMD5.ArrayBuffer();// 获取文件二进制数据// fileReader.readAsArrayBuffer(event.target.files[0]);fileReader.readAsArrayBuffer(file);return new Promise((resolve, reject) => {fileReader.onload = function (e) {spark.append(e.target.result);var md5 = spark.end();resolve(md5)};})},/** 通过操作 */UpdateStatus(row, status) {// 组装数据const data = {id: row.id,status}let that = thisthis.$modal.confirm(`是否确认 通过 xxxx单编号为 “${row.id}” 的数据项？`).then(() => {// 判断点击的是通过按钮，点击通过按钮要先上传图片if (status == 0) {// 判断是否上传了图片if (this.dialogImageUrls[`i${row.id}`]) {this.uploadFile(this.fileList[`f${row.id}`], row.id);} else {this.$message('请先上传图片');}} else {........;}}).catch(() => { });},},}
</script>
<style lang="scss" scoped>::v-deep .el-upload--picture-card {margin: 5px 0;width: 120px;height: 80px;line-height: 80px;}::v-deep .el-upload-list--picture-card .el-upload-list__item {width: 120px;height: 80px;margin-top: 0;}.hideUpload {margin: 5px 0;width: 120px;height: 80px;}.hideUpload ::v-deep .el-upload {display: none;/* 上传按钮隐藏 */}
</style>

二、js接口请求代码

提示：下面的请求接口是进行封装过的，就不进行具体展示了

import request from '@/utils/request'// 更新退款媒介内部单数据
export function updateFormRefundRecord(data) {return request({url: 'xxxxxxxxxx',method: 'put',data: data})
}// 获取阿里OSS签名
export function getOssPolicy(data) {return request({url: 'xxxxxxx',method: 'get',params: data})
}// 上传到阿里OSS
export function uploadOss(pre) {return request({url: pre.url,method: 'post',data: pre.data})
}