uni-app qiun-data-charts无法显示tooltip

如下代码无法使得图表展示tooltip

<template><view style="overflow: hidden; background-color: #fff;box-sizing: border-box; border-radius: 5px; box-shadow: 4px 2px 6px #ccc;padding: 10px; position:relative;"><view style="font-weight: bold; font-size: 40rpx; color: #4c4c4c;">能耗信息</view><view class="charts-box"><bn-title-bar height="15px" font-size="30rpx">近30天设备用电趋势</bn-title-bar><qiun-data-charts type="column" :opts="opts" :chartData="chartData" :canvas2d='true' tooltipFormat="tooltipForUnit"/></view></view>
</template><script>export default {data() {return {chartData: {},//您可以通过修改 config-ucharts.js 文件中下标为 ['column'] 的节点来配置全局默认参数，如都是默认参数，此处可以不传 opts 。实际应用过程中 opts 只需传入与全局默认参数中不一致的【某一个属性】即可实现同类型的图表显示不同的样式，达到页面简洁的需求。opts: {update: true,color: ["#52c88d", "#52c88d"],padding: [15, 5, 12, 5],enableScroll: false,dataLabel: false,canvas2d: true,legend: {},xAxis: {disableGrid: true,fontSize: 10,labelCount: 10,rotateLabel: false,},yAxis: {gridType: "dash",dashLength: 2,disabled: false,showTitle: true,data: [{title: "kWh",}]},extra: {column: {type: "group",width: 15,activeBgColor: "#000000",activeBgOpacity: 0.08,linearType: "custom",seriesGap: 5,linearOpacity: 0.5,barBorderCircle: true,customColor: ["#39fae4","#52c88d"]}}}};},onReady() {this.getServerData();},methods: {getServerData() {//模拟从服务器获取数据时的延时setTimeout(() => {//模拟服务器返回数据，如果数据格式和标准格式不同，需自行按下面的格式拼接let res = {categories: ["2018", "2019", "2020", "2021", "2022", "2023"],series: [{name: "目标值",data: [35, 36, 31, 33, 13, 34]},{name: "完成量",data: [18, 27, 21, 24, 6, 28]}]};this.chartData = JSON.parse(JSON.stringify(res));}, 500);},}};
</script><style scoped>/* 请根据实际需求修改父元素尺寸，组件自动识别宽高 */.charts-box {width: 100%;height: 300px;}
</style>