怎么用Vue+Echarts实现简单折线图

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Vue+Echarts实现一个折线图，打开vue的项目:

在项目里面安装echarts

npm install echarts --save

在需要用图表的地方引入

import echarts from 'echarts'

打开my.vue

继续写代码，代码如下：

<template>    <!--为echarts准备一个具备大小的容器dom-->    <div id="main" ></div></template><script>    import echarts from 'echarts'    export default {        name: '',        data() {            return {                charts: '',                            opinionData: ["3", "2", "4", "4", "5"]            }        },        methods: {            drawLine(id) {                this.charts = echarts.init(document.getElementById(id))                this.charts.setOption({                    tooltip: {                        trigger: 'axis'                    },                    legend: {                        data: ['近七日收益']                    },                    grid: {                        left: '3%',                        right: '4%',                        bottom: '3%',                        containLabel: true                    },                     toolbox: {                        feature: {                            saveAsImage: {}                        }                    },                    xAxis: {                        type: 'category',                        boundaryGap: false,                    data: ["1","2","3","4","5"]                                        },                    yAxis: {                        type: 'value'                    },                     series: [{                        name: '近七日收益',                        type: 'line',                        stack: '总量',                        data: this.opinionData                    }]                })            }        },        //调用        mounted() {            this.$nextTick(function() {                this.drawLine('main')            })        }    }</script><style scoped>    * {        margin: 0;        padding: 0;        list-style: none;    }</style>

这个时候，可以看到，加载出的折线图了，后面可以继续进行完善。

这是最基本的折线图，里面的折线点需要替换的话，要注意一些事情

如下代码 所示

<template>    <!--为echarts准备一个具备大小的容器dom-->    <div id="main" ></div></template><script>    import {getorder} from '../api/api.js'    import echarts from 'echarts'    export default {        name: '',        data() {            return {                charts: '',                                                //opinionData: ["3", "2", "4", "4", "5"]                opinionData: [],                temp:[],                id:1,            }        },        methods: {            drawLine(id) {                // 前端向后端发送请求，获取数据(折线点)                // 发送请求 要写在drawLine方法里面，不然的话 opinionData 赋予不上数据，做无用功                // params 里面的是 要向后端传递的一些参数，为了获取数据库中的数据，要替换成你自己的参数                let params = {typ:9,id:this.id}                // 这是我个人的 axios 封装，有兴趣的话，可以看我 axios 封装的文章                getorder(params).then((result)=>{                this.temp = result.data.tempdic                // console.log(this.temp)                // 进行赋值                for (let i = 0; i < this.temp.length; i++) {                    var str = ''                    str += this.temp[i].temp                    this.opinionData.push(str)                    // console.log(this.temp[i].temp)                }                                // 折线图 自带的代码                this.charts = echarts.init(document.getElementById(id))                this.charts.setOption({                    tooltip: {                        trigger: 'axis'                    },                    legend: {                        data: ['温度展示']                    },                    grid: {                        left: '3%',                        right: '4%',                        bottom: '3%',                        containLabel: true                    },                     toolbox: {                        feature: {                            saveAsImage: {}                        }                    },                    xAxis: {                        type: 'category',                        boundaryGap: false,                    data: []                                        },                    yAxis: {                        type: 'value',                                            },                     series: [{                        name: '温度展示',                        type: 'line',                        stack: '总量',                        data: this.opinionData                    }]                })                        })                }        },        //调用        mounted() {            this.$nextTick(function() {                this.drawLine('main')            })        }    }</script><style scoped>    * {        margin: 0;        padding: 0;        list-style: none;    }</style>

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