1.把echarts 在 `methods` 封装成一个方法`mounted` 在中调用

折线图和柱状图

mounted调用下边两个方法

  mounted(){//最早获取DOM元素的生命周期函数 挂载完毕console.log('mounted-id' , document.getElementById('charts'))this.line()this.pie()},

methods里边的方法

line() {// 基于准备好的dom，初始化echarts实例var myChart = echarts.init(document.getElementById('charts'));// 绘制图表myChart.setOption({tooltip: {//提示框组件trigger: 'axis',},legend: {},toolbox: {feature: {// dataZoom: {//   yAxisIndex: 'none'// },// restore: {},saveAsImage: {}}},xAxis: {//x轴数据data: [120, 200, 150, 80, 70, 110, 130],},yAxis: {//y轴会自动创建数据},series: [//图表内容{name: '销售额',type: 'line',data: [120, 200, 150, 80, 70, 110, 130],,smooth: true,//是否平滑曲线显示},{name: '销售量',type: 'bar',data: [120, 200, 150, 80, 70, 110, 130],}]});},

饼图

 pie(){let myChart = echarts.init(document.getElementById('pie'));myChart.setOption({tooltip: {trigger: 'item'},legend: {top: '5%',left: 'center'},series: [{name: 'Access From',type: 'pie',radius: ['40%', '70%'],avoidLabelOverlap: false,itemStyle: {borderRadius: 10,borderColor: '#fff',borderWidth: 2},label: {show: false,position: 'center'},emphasis: {label: {show: true,fontSize: 40,fontWeight: 'bold'}},labelLine: {show: false},data: [{ value: 1048, name: 'Search Engine' },{ value: 735, name: 'Direct' },{ value: 580, name: 'Email' },{ value: 484, name: 'Union Ads' },{ value: 300, name: 'Video Ads' }]}]});},

注意的地方:created调用location事件时获取dom对象，是不行的，因为在created钩子函数中是获取不到dom的，我们可以使用mounted钩子替换成created钩子

从后端取数据

发现后端给我们返回的不是echarts的格式，这个时候我们做一个操作
在这里插入图片描述
下一步操作遍历内容数据格式转换

最后一步在echarts柱状图或者折线图里边去显示这些数据

    methods:{// -----获取图标动态数据async format(){let res = await this.$api.format()console.log('获取图标动态数据---',res.data);console.log(res.data.result.data.sale_money);//[{}{}]// 折线图 柱状图数据格式:[xx,xx,xx]// 获取x轴的数据名称let arr = res.data.result.data.sale_money;//拿到数据let arrx = []let total = []let money = []arr.forEach((ele)=>{//ele是取每一项arrx.push(ele.name)total.push(ele.num)money.push(ele.total_amount)})console.log(arrx);console.log(total);console.log(money);this.line(arrx,money,total)},//绘制图表--折线------------------line(arrx,money,total) {// 基于准备好的dom，初始化echarts实例var myChart = echarts.init(document.getElementById('charts'));// 绘制图表myChart.setOption({tooltip: {//提示框组件trigger: 'axis',},legend: {},toolbox: {feature: {// dataZoom: {//   yAxisIndex: 'none'// },// restore: {},saveAsImage: {}}},xAxis: {//x轴数据data:arrx,},yAxis: {//y轴会自动创建数据},series: [//图表内容{name: '销售额',type: 'line',data:money,smooth: true,//是否平滑曲线显示},{name: '销售量',type: 'bar',data: total,}]});},},

饼状图取数据发现

在这里插入图片描述
数据循环遍历+数据格式转换

    let pieData = []arr.forEach((ele)=>{//ele是取每一项//饼图--对象数据let obj={}obj.name = ele.name;obj.value = ele.total_amount;pieData.push(obj)//[{name:,value:},{},{}]})console.log('饼图',pieData);

饼图最后一步在echarts柱状图或者折线图里边去显示这些数据

   //绘制饼图pie(pieData) {var myChart = echarts.init(document.getElementById('pie'));var option;option = {tooltip: {trigger: 'item',formatter:'{a}<br/>{b}:{d}%'},legend: {orient: 'vertical',left: 'left'},series: [{name: '产品销售额',type: 'pie',radius: '50%',data:pieData,// data: [//[{},{}]//   { value: 1048, name: '审议' },//   { value: 735, name: '淘宝' },//   { value: 580, name: '京东' }// ],emphasis: {//高亮配置itemStyle: {shadowBlur: 10,shadowOffsetX: 0,shadowColor: 'rgba(0, 0, 0, 0.5)'}}}]};option && myChart.setOption(option);},

在这里插入图片描述
全部代码

<template><div class="home"><!--1.  顶部区域布局---------- --><div class="header"><div class="item">总销售额<div class='num'>{{ totalData.saleTotal | num}}</div><div class="bottom">今日销售额:{{totalData.sale | num}}</div></div><div class="item">总访问量<div class='num'>{{ totalData.viewsTotal | num}}</div><div class="bottom">今日访问量:{{totalData.views | num}}</div></div><div class="item">总收藏量<div class='num'>{{ totalData.collectTotal | num  }}</div><div class="bottom">今日销售额:{{ totalData.collectTotal | num}}</div></div><div class="item">总支付量<div class='num'>{{totalData.payTotal | num }}</div><div class="bottom">今日支付量:{{ totalData.pay | num}}</div></div></div><!--2. 访问数据统计 -----------------><div class="content"><div class="time-info" id='box13'><div class="title">月销售额</div><div id="charts" style="width: 100%; height: 300px"></div></div><div class="area" id="box1"><div class="title">产品销售比例</div><div id="pie" style="width: 100%; height: 300px"></div></div></div><!-- 3.  --><!-- 最新内容 --><div class="home-footer"><el-card class="box-card"><div slot="header" class="clearfix"><span>今日订单</span></div><div class="text item"><el-row><el-col :span="8"><div class="title">今日订单数</div><div>{{ orderData.curOrderCount }}</div></el-col><el-col :span="8"><div class="title">汇总确认订单</div><div>{{ orderData.curCollect }}</div></el-col><el-col :span="8"><div class="title">今日金额</div><div>{{ orderData.curMoney }}</div></el-col></el-row></div></el-card><el-card class="box-card"><div slot="header" class="clearfix"><span>本月订单</span></div><div class="text item"><el-row><el-col :span="8"><div class="title">本月订单数</div><div>{{ orderData.orderCount }}</div></el-col><el-col :span="8"><div class="title">汇总确认订单</div><div>{{ orderData.collect }}</div></el-col><el-col :span="8"><div class="title">本月金额</div><div>{{ orderData.money }}</div></el-col></el-row></div></el-card><el-card class="box-card"><div slot="header" class="clearfix"><span>快捷入口</span></div><div class="text item"><el-button type="primary">产品管理</el-button><el-button>消息管理</el-button><el-button>内容管理</el-button></div></el-card></div></div>
</template><script>
import * as echarts from 'echarts'; 
export default {data(){return{totalData:{},//数据统计orderData:{},//订单数据}},created(){this.totalInfo();//打开页面就要加载this.orderinfo();//this.format();},mounted(){//最早获取DOM元素的生命周期函数 挂载完毕console.log('mounted-id' , document.getElementById('charts'))// this.line()// this.pie()},methods:{// ------获取首页统计数据async totalInfo(){let res = await this.$api.totalInfo();console.log('首页统计信息---',res.data);this.totalData = res.data.data.list;// console.log( res.data.data.list);},// ----获取今日订单数据async orderinfo(){let res = await this.$api.orderinfo()console.log('首页统计信息---',res.data);this.orderData = res.data.list},// -----获取图标动态数据async format(){let res = await this.$api.format()console.log('获取图标动态数据---',res.data);console.log(res.data.result.data.sale_money);//[{}{}]// 折线图 柱状图数据格式:[xx,xx,xx]// 获取x轴的数据名称let arr = res.data.result.data.sale_money;//拿到数据let arrx = []let total = []let money = []let pieData = []arr.forEach((ele)=>{//ele是取每一项arrx.push(ele.name)total.push(ele.num)money.push(ele.total_amount)//饼图--对象数据let obj={}obj.name = ele.name;obj.value = ele.total_amount;pieData.push(obj)//[{name:,value:},{},{}]})console.log(arrx);console.log(total);console.log(money);this.line(arrx,money,total)this.pie(pieData)console.log('饼图',pieData);},//绘制图表--折线------------------line(arrx,money,total) {// 基于准备好的dom，初始化echarts实例var myChart = echarts.init(document.getElementById('charts'));// 绘制图表myChart.setOption({tooltip: {//提示框组件trigger: 'axis',},legend: {},toolbox: {feature: {// dataZoom: {//   yAxisIndex: 'none'// },// restore: {},saveAsImage: {}}},xAxis: {//x轴数据data:arrx,},yAxis: {//y轴会自动创建数据},series: [//图表内容{name: '销售额',type: 'line',data:money,smooth: true,//是否平滑曲线显示},{name: '销售量',type: 'bar',data: total,}]});},//绘制饼图pie(pieData) {var myChart = echarts.init(document.getElementById('pie'));var option;option = {tooltip: {trigger: 'item',formatter:'{a}<br/>{b}:{d}%'},legend: {orient: 'vertical',left: 'left'},series: [{name: '产品销售额',type: 'pie',radius: '50%',data:pieData,// data: [//[{},{}]//   { value: 1048, name: '审议' },//   { value: 735, name: '淘宝' },//   { value: 580, name: '京东' }// ],emphasis: {//高亮配置itemStyle: {shadowBlur: 10,shadowOffsetX: 0,shadowColor: 'rgba(0, 0, 0, 0.5)'}}}]};option && myChart.setOption(option);},},// 使用过滤器----处理数据格式filters:{num(value){if(!value) return;return value.toLocaleString();}}}
</script><style lang="less" scoped>
.home {margin: 10px;
}
.header {display: flex;padding-right: 30px;.item {flex: 1;height: 100px;padding: 10px;background: #fff;border-radius: 10px;margin-left: 20px;margin-right: 20px;font-weight: bold;color: #fff;// text-align: center;position: relative;.num {font-size: 22px;margin: 10px;color: #fff;}.bottom {position: absolute;border-top: 1px solid rgb(246, 245, 245);padding: 10px 20px;bottom: 0;right: 0;left: 0;color: #fff;font-weight: normal;}}.item:nth-child(1) {background-image: linear-gradient(#df887d, #88554d);}.item:nth-child(2) {background-image: linear-gradient(#409eff, #2e556e);}.item:nth-child(3) {background-image: linear-gradient(#b54fa8, #713c7a);}.item:nth-child(4) {background-image: linear-gradient(#1cd2f1, #39717a);}
}
/deep/.el-card__body{// border: 1px solid red;text-align: center;line-height: 30px;
}
// 图表.content {margin: 20px;display: flex;height: 320px;.time-info {flex: 2;background: #fff;margin-right: 20px;padding: 10px;}.area {flex: 1;background: #fff;padding: 10px;}
}//内容.home-footer {display: flex;padding-left: 20px;margin-bottom: 20px;.box-card {flex: 1;margin-right: 30px;span {font-weight: 600;}}
}</style>