解决echarts和v-show一起使用canvas宽高改变

本来是想没有数据显示暂无数据的，结果显示成了这样

1.把V-show改成v-if

<template><divclass="chart1"ref="chart1"v-if="!nodata"style="width: 100%; height: 100%"></div><el-empty description="暂无数据" v-else />
</template>

2.使用nextTick

import {  nextTick } from "vue";if (JSON.stringify(callNum) == "[]") {chartObj.nodata = true;} else {chartObj.nodata = false;nextTick(() => {DrawAnslysePic(callNum);});}