需求

如下图数据格式所示，现要求按照该格式进行绘制折线图

分析

在绘制折线图时，通常我们的 series 中的 data 数据是这样的格式

option = {title: {text: 'Stacked Area Chart'},tooltip: {trigger: 'axis',axisPointer: {type: 'cross',label: {backgroundColor: '#6a7985'}}},legend: {data: ['Email', 'Union Ads', 'Video Ads', 'Direct', 'Search Engine']},toolbox: {feature: {saveAsImage: {}}},grid: {left: '3%',right: '4%',bottom: '3%',containLabel: true},xAxis: [{type: 'category',boundaryGap: false,data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']}],yAxis: [{type: 'value'}],series: [{name: 'Email',type: 'line',stack: 'Total',areaStyle: {},emphasis: {focus: 'series'},data: [120, 132, 101, 134, 90, 230, 210]},{name: 'Union Ads',type: 'line',stack: 'Total',areaStyle: {},emphasis: {focus: 'series'},data: [220, 182, 191, 234, 290, 330, 310]},{name: 'Video Ads',type: 'line',stack: 'Total',areaStyle: {},emphasis: {focus: 'series'},data: [150, 232, 201, 154, 190, 330, 410]},{name: 'Direct',type: 'line',stack: 'Total',areaStyle: {},emphasis: {focus: 'series'},data: [320, 332, 301, 334, 390, 330, 320]},{name: 'Search Engine',type: 'line',stack: 'Total',label: {show: true,position: 'top'},areaStyle: {},emphasis: {focus: 'series'},data: [820, 932, 901, 934, 1290, 1330, 1320]}]
};

但是给定的格式是如下的这种，我们就需要进行一些变换

1. 首先是 Y 轴的格式需要改变，之前是value，但value会导致数据变为这种情况
   
   因此需要将Y轴格式改为如下，效果就出来了
   
   

2. X 轴需要变换

xAxis: {type: 'category',boundaryGap: false,data: []},

3. series 中 data 的数据需要变换

 series: [{data: [// xAxis    yAxis[  0,        0,    2  ], // 意思是此点位于 xAxis: '星期一', yAxis: 'a'。[  '星期四',  2,    1  ], // 意思是此点位于 xAxis: '星期四', yAxis: 'm'。[  2,       'p',   2  ], // 意思是此点位于 xAxis: '星期三', yAxis: 'p'。[  3,        3,    5  ]]}] 

格式处理如下：

for (let index = 0; index < res.series.length; index++) {const item = res.series[index];const obj = {name: item.name,type: 'line',data: item.data,stack: 'Total',areaStyle: {},emphasis: {focus: 'series'},}option.value.series.push(obj)}option.value.xAxis.data = res.xAxisData

4. 源码

<template><div ref="echartsRef" class="content"> </div>
</template><script lang="ts" setup>
import {ref,reactive,watch,watchEffect,toRefs,defineProps,onMounted,
} from 'vue';
import * as echarts from 'echarts';
import { getInfoAQJCApi } from '@/api/dashboard'/*** @description : 安全监测模块* @author : 'Hukang'* @param : '' * @date : 2024-03-05 14:59:56
*/
const props = defineProps({//子组件接收父组件传递过来的值InfoAQJ: Object,
})
//使用父组件传递过来的值
const { InfoAQJ } = toRefs(props)const echartsData = reactive({option: {title: {text: ''},tooltip: {trigger: 'axis',axisPointer: {type: 'cross',label: {backgroundColor: '#6a7985'}}},legend: {data: [],right: "5%",top: "5%",textStyle: {fontSize: 12, //字体大小color: "#ffffff" //字体颜色}},toolbox: {feature: {saveAsImage: {}}},grid: {left: '3%',right: '4%',bottom: '3%',containLabel: true},xAxis: {type: "category",boundaryGap: false,data: [],axisLine: {lineStyle: {color: "rgba(255, 255, 255, 0.20)"}},axisTick: {show: false},nameTextStyle: {color: "#ffffff",fontSize: 12},axisLabel: {textStyle: {color: "#ffffff",fontSize: 12},formatter: (value, index) => {return value.replace(/(\d{4})-(\d{1,2})-(\d{1,2}).*/, "$1-$2-$3").slice(5);}}},yAxis: [{name: '',type: "value",axisTick: {show: false},nameTextStyle: {color: "#ffffff",fontSize: 12},axisLine: {show: false,lineStyle: {color: "#ffffff"}},axisLabel: {textStyle: {color: "#ffffff",fontSize: 12}},splitLine: {lineStyle: {type: "dashed", //虚线color: "rgba(255,255,255,0.2)"},show: true //隐藏},min(v) {return v.min}}],series: []}
});const { option } = toRefs(echartsData);
const echartsRef = ref<string>();
let echartInstance;
let series = [];
function getAreaStyle(index) {let areaStyle = null;if (index == 0) {areaStyle = {color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{offset: 0,color: "#FDBD35"},{offset: 0.8,color: "rgba(253, 189, 53, 0.1)"}])};} else if (index == 1) {areaStyle = {color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{offset: 0,color: "#32D7FF"},{offset: 0.8,color: "rgba(0,254,243,0.1)"}])};} else {areaStyle = {color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [{offset: 0,color: "#20D661"},{offset: 0.8,color: "rgba(32,214,97,0.06)"}])};}return areaStyle;
}
watchEffect(() => {if (InfoAQJ.value) {const res = InfoAQJ.valueoption.value.legend.data = res.legendoption.value.yAxis[0].name = res.yMain[0]option.value.xAxis.data = res.xAxisDatares.series.forEach((item, index) => {let obj = {name: item.name,type: "line",data: item.data,smooth: true,areaStyle: getAreaStyle(index)};series.push(obj);option.value.series.push(obj)});}
})
onMounted(() => {echartInstance = echarts.init(echartsRef.value, 'macarons');echartInstance.setOption(option.value);
});
</script><style scoped lang="less">
@import '@/assets/style/leftright.less';.content {width: 100%;height: 100%;
}
</style>