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概览：根据UI设计需要做3个饼图且之间有关联，并且处理后端返回的数据。

参考链接：

echart 官网的一个案例，3个饼图

实现思路：

根据案例，把数据处理成对应的。

参考代码：

1.处理后端数据：

/*** 处理接口数据* 注意：echart是在渲染的时候就传递数据*/
const getMetarialCondition = () => {api.getMetarialList.post({ shipGuid: data.shipGuid }).then((res) => {if (res.data.code == 200) {// 返回data是否为空if (res.data.data.length !== 0) {// //库存总数let totalHouseNum = res.data.data?.map((item, index) => {return item.num}).reduce((preValue, curValue) => {return preValue += curValue})//库存入库let putHouseNum = res.data.data?.map((item, index) => {return item.putNum}).reduce((preValue, curValue) => {return preValue += curValue})//库存出库let outHouseNum = res.data.data?.map((item, index) => {return item.outNum}).reduce((preValue, curValue) => {return preValue += curValue})/*** 优化数据*///库存余量let myModifyTotalNum = res.data.data?.map((item, index) => {return [item.name, item.num, '库存余量']})//库存入库let myModifyPutNum = res.data.data?.map((item, index) => {return [item.name, item.putNum, '库存入库']})//库存出库let myModifyOutNum = res.data.data?.map((item, index) => {return [item.name, item.outNum, '库存出库']})let myModifyData = [...myModifyTotalNum, ...myModifyPutNum, ...myModifyOutNum]/*** 更新状态*/metarialData.totalHouseNum = totalHouseNummetarialData.putHouseNum = putHouseNummetarialData.outHouseNum = outHouseNumreDrawChartMetarial(myModifyData)} else {let nullData = []reDrawChartMetarial(nullData)}}})
};

2.ecahrt渲染的参数：

/*** 渲染echart的方法* @param {[]} value 传参*/
const reDrawChartMetarial = (value) => {const mySource = [['name', 'value', 'myTag'],...value]let metarialOption = {tooltip: {trigger: 'item',position: 'right',  //提示框浮层的位置},grid: {left: "3%",right: "4%",bottom: "3%",width: "820px",height: "320px",containLabel: true},legend: {orient: 'horizontal',left: 'center',textStyle: {color: '#000',fontSize: fontSize(14),},formatter: function (a) {if (a.length > 5) {a = a.slice(0, 5) + "...";   //截断拼接省略号    }return a;}},dataset: [{source: mySource,},{transform: {type: 'filter',config: { dimension: 'myTag', value: '库存余量' }}},{transform: {type: 'filter',config: { dimension: 'myTag', value: '库存入库' }}},{transform: {type: 'filter',config: { dimension: 'myTag', value: '库存出库' }}}],series: [{type: 'pie',radius: 50,top: 100,left: -100,center: ['10%', '50%'],datasetIndex: 1,textStyle: {color: "#000",align: "right",fontSize: fontSize(16),},label: {formatter: function (a) {if (a.name) {a = a.name.slice(0, 12) + "...";   //截断拼接省略号    }return a;},}},{type: 'pie',radius: 50,top: 100,center: ['50%', '50%'],datasetIndex: 2,label: {normal: {formatter: function (a) {if (a.name) {a = a.name.slice(0, 12) + "...";   //截断拼接省略号    }return a;},}}},{type: 'pie',radius: 50,top: 100,left: 300,center: ['90%', '50%'],datasetIndex: 3,label: {normal: {formatter: function (a) {if (a.name) {a = a.name.slice(0, 5) + "...";   //截断拼接省略号    }return a;},}}}],media: [{query: { minAspectRatio: 1 },option: {series: [{ center: ['25%', '50%'] },{ center: ['50%', '50%'] },{ center: ['75%', '50%'] }]}},{option: {series: [{ center: ['50%', '25%'] },{ center: ['50%', '50%'] },{ center: ['50%', '75%'] }]}}]};metarialOption && dataEcharts.metaChart.setOption(metarialOption, true);
}

效果展示：