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l-echart
https://ext.dcloud.net.cn/plugin?id=4899
1.因为小程序有主包分包大小限制,并且uni_modules
中的包也会算在主包体积中,而我项目中的图表是在分包中使用的,所以我移动uni_modules
中的l-echart
图表组件到分包目录组件文件夹中
2.精简echarts.min.js
体积,因为需求中只需要柱图和饼图,所以我去https://echarts.apache.org/zh/builder.html下载指定的 echarts 组件压缩包,然后替换l-echart
中的echarts.min.js
文件,只需要500kb
左右大小
<template> <view class="charts-box"> <l-echart ref="chart" @finished="init" class="charts-box"></l-echart> </view> </template> <script> import LEchart from "@/package-pc/pages/components/lime-echart/components/l-echart/l-echart.vue"; import * as echarts from "@/package-pc/pages/components/lime-echart/static/echarts.min.js"; import option from "@/package-pc/pages/monthreport/option"; export default { components: { LEchart, }, data() { return { option: option, }; }, // 使用组件的finished事件里调用 methods: { async init() { const chart = await this.$refs.chart.init(echarts); chart.setOption(this.option); }, }, }; </script> <style scoped> /* 请根据实际需求修改父元素尺寸,组件自动识别宽高 */ .charts-box { width: 100%; height: 600px; } </style>
l-echart
源码,简化组件用法(不推荐用法):1.组件中直接引入echarts.min.js
2.props
增加option
传参
3.watch
中监听option
传参
4.mounted
中直接执行init
方法初始化图表
5.init
方法中调用setOption
方法
6.加入uni.onWindowResize
方法监听宽高变化,然后调用原本就实现的resize
方法
import * as echarts from "@/package-pc/pages/components/lime-echart/static/echarts.min.js"; export default { name: "lime-echart", props: { ... option: { type: Object, }, }, watch: { option: { handler() { this.setOption(this.option); }, deep: true, }, }, mounted() { this.$nextTick(() => { this.$emit("finished"); this.init(); }); }, methods:{ ... async init(...args) { // #ifndef APP-NVUE // if (arguments && arguments.length < 1) { // console.error( // "缺少参数:init(echarts, theme?:string, opts?: object, callback?: function)" // ); // return; // } // #endif ... this.chart = echarts.init( config.canvas, theme, Object.assign({}, config, opts) ); this.chart.setOption(this.option ?? {}); uni.onWindowResize(() => { this.resize(); }); ... }, }
直接传参option给组件,请求接口后修改option即可
<template> <view class="charts-box"> <l-echart :option="option1" class="charts-box"></l-echart> </view> </template> <script> import LEchart from "@/package-pc/pages/components/lime-echart/components/l-echart/l-echart.vue"; import option from "@/package-pc/pages/monthreport/option"; export default { components: { LEchart, }, data() { return { option: option, }; }, // 修改option即可 methods: { async setText() { this.option.title.text = "test" }, }, }; </script> <style scoped> /* 请根据实际需求修改父元素尺寸,组件自动识别宽高 */ .charts-box { width: 100%; height: 600px; } </style>
l-echart
源码,简化组件用法(推荐用法):做的工作其实就是把echarts放在组件里面使用了,页面中就不用导入了,同时组件内部做了init初始化图表,页面中setOption就行了
import * as echarts from "@/package-pc/pages/components/lime-echart/static/echarts.min.js"; export default { name: "lime-echart", mounted() { this.$nextTick(async () => { await this.init(); this.$emit("finished"); }); }, methods:{ ... async init(...args) { // #ifndef APP-NVUE // if (arguments && arguments.length < 1) { // console.error( // "缺少参数:init(echarts, theme?:string, opts?: object, callback?: function)" // ); // return; // } // #endif ... this.chart = echarts.init( config.canvas, theme, Object.assign({}, config, opts) ); uni.onWindowResize(() => { this.resize(); }); ... }, }
<template> <view class="charts-box"> <l-echart ref="chart" :option="option" @finished="init" class="charts-box"></l-echart> </view> </template> <script> import LEchart from "@/package-pc/pages/components/lime-echart/components/l-echart/l-echart.vue"; import option from "@/package-pc/pages/monthreport/option"; export default { components: { LEchart, }, data() { return { option: option, }; }, // finished回调中设置option,接口请求图表数据也放在这里 methods: { init() { this.$refs.chart.setOption(this.option); }, }, }; </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: 600px; } </style>
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