这篇文章主要介绍“Vue怎么动态扩展表头的表格及数据”的相关知识，小编通过实际案例向大家展示操作过程，操作方法简单快捷，实用性强，希望这篇“Vue怎么动态扩展表头的表格及数据”文章能帮助大家解决问题。
实现效果
需求描述
接收后端传的json数据，数据格式为数组对象嵌套数组对象再嵌套对象，需要将每个数组对象遍历后取出想要的数据，通过forEach()方法来实现遍历、赋值。
数据结构
业务代码
<template> <div class="app-container"> <!-- 表单区域 --> <el-form :model="queryParams" ref="queryForm" :inline="true" label-width="68px"> <el-form-item label="店面" prop="storeId" label-width="40px"> <treeselect v-model="queryParams.storeId" :options="deptOptions" :normalizer="normalizerDept" size="small" placeholder="请选择" class="treeselect-main" /> </el-form-item> <el-form-item label="品牌" prop="brandId" label-width="40px"> <el-select v-model="queryParams.brandId" filterable placeholder="请选择" clearable size="medium"> <el-option v-for="dict in brandOptions" :key="dict.id" :label="dict.brand" :value="dict.id"> </el-option> </el-select> </el-form-item> <el-form-item label="区域" prop="areaId" label-width="80px"> <treeselect v-model="queryParams.areaId" :options="areaOptions" :normalizer="normalizer2" clearable size="small" placeholder="请选择" /> </el-form-item> <el-form-item label="日期" label-width="40px"> <el-date-picker v-model="dateRange" size="small" value-format="yyyy-MM-dd" type="daterange" range-separator="-" start-placeholder="开始日期" end-placeholder="结束日期" :editable="false"> </el-date-picker> </el-form-item> <el-form-item> <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button> <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button> <el-button type="warning" plain icon="el-icon-download" size="mini" :loading="exportLoading" @click="handleExport">导出</el-button> </el-form-item> </el-form> <!-- 表单区域结束 --> <!-- table表格区域 --> <el-table v-loading="loading" :data="mileageList" @selection-change="handleSelectionChange" border> <el-table-column label="试驾车" align="center" :show-overflow-tooltip="true"> <el-table-column label="店面" align="center" prop="storeName" :show-overflow-tooltip="true" width="180px" /> <el-table-column label="总行驶次数" align="center" class-name="small-padding fixed-width" width="130"> <template slot-scope="scope"> <el-button size="mini" type="text" @click="handleInfo(scope.row,1, scope.row.totalMount)"> {{ scope.row.totalMount }} </el-button> </template> </el-table-column> <el-table-column label="里程数(KM)" align="center" prop="totalMileage" width="130" :show-overflow-tooltip="true" /> <el-table-column label="总时长(分钟)" align="center" prop="totalTime" width="130" :show-overflow-tooltip="true" /> <el-table-column label="GPS预估数" align="center" prop="predictMileage" width="130" :show-overflow-tooltip="true" /> <el-table-column label="里程占比" align="center" prop="mileageProportion" width="130" :show-overflow-tooltip="true" /> </el-table-column> <el-table-column label="公务用车" align="center" :show-overflow-tooltip="true"><!--用车数据--><el-table-column v-for="(planItem, index) in planList" :key="index" align="center" :label="planItem.dictLabel"> <el-table-column v-for="(stageItem, indexChild) in planItem.stageList" :key="index+'-'+indexChild" align="center" :label="stageItem.stageLable" width="100"> <!-- <template slot-scope="scope"> <span>{{ scope.row.purposeTypeList[index].stageList[indexChild].value }}</span> </template> --><template slot-scope="scope"> <span v-if="scope.row.purposeTypeList[index].stageList[indexChild].stageLable == '行驶次数'"> <el-button size="mini" type="text" @click="handleInfo(scope.row,2, scope.row.month,planItem.stageList[indexChild].carType)"> {{ scope.row.purposeTypeList[index].stageList[indexChild].value }} </el-button> </span> <span v-else>{{ scope.row.purposeTypeList[index].stageList[indexChild].value }}</span></template> </el-table-column></el-table-column> </el-table-column> </el-table> <!-- table表格区域结束 --> <!-- 分页区域 --> <pagination v-show="total>0" :total="total" :page.sync="queryParams.pageNum" :limit.sync="queryParams.pageSize" @pagination="getList" /> <!-- 分页区域结束 --> </div></template> <script> import { selectMileageSumary, exportMileageSumary, exportDailyMileage } from "@/api/amtestdriver/drivecar"; import Treeselect from "@riophae/vue-treeselect"; import "@riophae/vue-treeselect/dist/vue-treeselect.css"; import { selectDept } from "@/api/system/dept"; import { listArea, } from "@/api/base/area/area"; import { listData } from "@/api/base/carBrand/carBrand"; export default { name: "Mileagereport", components: { Treeselect }, data() { return { brandOptions: [], //品牌查询 areaOptions: [], //区域 deptOptions: [], //店面planList: [],//公务车数据 dateRange: [], // 遮罩层 loading: true, // 导出遮罩层 exportLoading: false, // 选中数组 ids: [], // 非单个禁用 single: true, // 非多个禁用 multiple: true, // 显示搜索条件 showSearch: false, title: "", open: false, mileageList: [], // 总条数 total: 0, // 查询参数 queryParams: { pageNum: 1, pageSize: 10, storeId: null, brandId: null, areaId: null, } }; }, created() { this.getList(); this.listDeptByType(2); listData(this.queryParams).then(response => { this.brandOptions = response.data; }); listArea().then((response) => { this.areaOptions = this.handleTree(response.data, "id", "parentId"); }); }, methods: { normalizer2(node) { if (node.children && !node.children.length) { delete node.children; } return { id: node.id, label: node.name, children: node.children, }; }, //加载店面列表 listDeptByType(type) { this.queryParams.type = type; selectDept(this.queryParams).then(response => { this.deptOptions = this.handleTree(response.data, "deptId"); if (response.data.length == 1) { this.queryParams.storeId = response.data[0].deptId; } }); this.queryParams.type = null; }, normalizerDept(node) { if (node.children && !node.children.length) { delete node.children; } return { id: node.deptId, label: node.deptName, children: node.children }; }, handleSelectionChange(selection) { this.ids = selection.map(item => item.id) this.single = selection.length !== 1 this.multiple = !selection.length }, handleQuery() { this.queryParams.pageNum = 1; this.getList(); }, getList() { this.loading = true; if (null != this.dateRange && this.dateRange.length > 0) { this.queryParams.startTime = this.dateRange[0]; this.queryParams.endTime = this.dateRange[1]; } else { this.queryParams.startTime = null; this.queryParams.endTime = null; } selectMileageSumary(this.queryParams).then(response => { this.mileageList = response.rows; console.log(response.rows); this.mileageList.forEach((res, index) => { this.mileageList[index].purposeTypeList.forEach((re, aaa) => { this.stageList=[]; if(this.mileageList[index].purposeTypeList[aaa].driveCarMileageSumary!=null){ this.stageList.push({stageLable: '行驶次数',value: this.mileageList[index].purposeTypeList[aaa].driveCarMileageSumary.officialMount,carType:this.mileageList[index].purposeTypeList[aaa].dictValue}); this.stageList.push({stageLable: '里程数(KM)',value: this.mileageList[index].purposeTypeList[aaa].driveCarMileageSumary.officialMileage}); this.stageList.push({stageLable: '时长(分钟)',value: this.mileageList[index].purposeTypeList[aaa].driveCarMileageSumary.officialTime}); this.stageList.push({stageLable: 'GPS预估数',value: this.mileageList[index].purposeTypeList[aaa].driveCarMileageSumary.officialPredictMileage}); this.stageList.push({stageLable: '里程占比',value: this.mileageList[index].purposeTypeList[aaa].driveCarMileageSumary.officialMileageProportion}); }else{ this.stageList.push({stageLable: '行驶次数',value: null,carType: null}); this.stageList.push({stageLable: '里程数(KM)',value: null}); this.stageList.push({stageLable: '时长(分钟)',value: null}); this.stageList.push({stageLable: 'GPS预估数',value: null}); this.stageList.push({stageLable: '里程占比',value: null}); } this.mileageList[index].purposeTypeList[aaa].stageList = this.stageList; }) }) this.planList = (this.mileageList[0] && this.mileageList[0]['purposeTypeList']) || []; this.total = response.total; this.loading = false; }); }, // 详情跳转 handleInfo(row, type, val, carType) { if (val != 0) { let seaParams = {}; seaParams = this.queryParams; seaParams.storeId = row.storeId; seaParams.appType = String(type); seaParams.dateRange = this.dateRange; seaParams.type = carType, this.$router.push({ path: '/mileage-report/details', query: seaParams, }) // console.log("this.queryParams",this.queryParams); } }, // 重置按钮 resetQuery() { this.queryParams.startTime = [] this.queryParams.endTime = [] this.dateRange = []; this.resetForm("queryForm"); this.handleQuery(); }, handleExport() { const queryParams = this.queryParams; this.$confirm("是否导出里程报表数据?", "警告", { confirmButtonText: "确定", cancelButtonText: "取消", type: "warning", }) .then(() => { this.exportLoading = true; return exportMileageSumary(queryParams); }) .then((response) => { // console.log(response) this.downloads(response); this.exportLoading = false; }) }, downloads(response) { // 拿到数据以后 通过 new Blob对象 创建excel if (!response) { return } let time = this.getNowTime(); let fileName = time + '里程报表数据.xls' const blob = new Blob([response], { type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8' }) // const blob = new Blob(["\ufeff",response], {type: 'text/plain'}); const href = window.URL.createObjectURL(blob) const downloadElement = document.createElement('a') downloadElement.style.display = 'none' downloadElement.href = href downloadElement.download = fileName document.body.appendChild(downloadElement) downloadElement.click() document.body.removeChild(downloadElement) // 下载完成移除元素 window.URL.revokeObjectURL(href) // 释放掉blob对象 }, // 获取当前时间 getNowTime() { var nowDate = new Date(); var year = nowDate.getFullYear(); var month = nowDate.getMonth() + 1 < 10 ? "0" + (nowDate.getMonth() + 1) : nowDate.getMonth() + 1; var day = nowDate.getDate() < 10 ? "0" + nowDate.getDate() : nowDate.getDate(); var dateStr = year + "" + month + "" + day; return dateStr; }, } };</script><style> .header { padding: 20px; margin-bottom: 10px; border-bottom: 1px solid #e6ebf5; }</style>关于“Vue怎么动态扩展表头的表格及数据”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识，可以关注编程网行业资讯频道，小编每天都会为大家更新不同的知识点。
