v-charts，点击页面按钮，不能二次重绘，解决方案

v-charts简介： 是基于 Vue2.0 和 Echarts 封装的图标组件，只需要统一提供一种对前后端都友好的数据格式设置简单的配置项，就可以生成常见的图表。

v-charts官方文档：v-charts

echarts官方文档：Documentation - Apache ECharts

安装

npm i v-charts echarts -S

在main.js中引用

//全部引入

import VCharts from 'v-charts'

//按需引入v-charts（项目中一般是按需引用，v-charts中每个图表组件，都已单独打包到lib文件夹下面了）

import VeLine from 'v-charts/lib/line.common'

import VePie from 'v-charts/lib/pie.common'

页面使用

<template>

<div id="mian">

<div class="con_from">

<div class="lineP">

<div class="item itemTime">

<i>筛选日期</i>

<el-date-picker

v-model="query.startDate"

value-format="yyyy-MM-dd"

type="date"

placeholder="选择日期"

>

</el-date-picker>

<span style="padding:0px 10px;">-</span>

<el-date-picker

v-model="query.endDate"

value-format="yyyy-MM-dd"

type="date"

placeholder="选择日期"

>

</el-date-picker>

</div>

<div class="itembtn">

<el-button class="searchBt" @click="onSearch">查询</el-button>

</div>

</div>

</div>

<div class="header">

<span :id="active == 0 ? 'fzcolor' : ''" @click="checkActive(0)"

>交易金额</span

>

<span :id="active == 1 ? 'fzcolor' : ''" @click="checkActive(1)"

>交易笔数</span

>

<span :id="active == 3 ? 'fzcolor' : ''" @click="checkActive(3)"

>退款金额</span

>

<span :id="active == 2 ? 'fzcolor' : ''" @click="checkActive(2)"

>退款笔数</span

>

<span :id="active == 4 ? 'fzcolor' : ''" @click="checkActive(4)"

>成功率</span

>

<div

:class="{ right: true, active: timeActive == 0 ? true : false }"

@click="checkTimeActive(0)"

>

近30天

</div>

<div

:class="{ right: true, active: timeActive == 1 ? true : false }"

@click="checkTimeActive(1)"

>

近7天

</div>



<div

:class="{ right: true, active: timeActive == 3 ? true : false }"

@click="checkTimeActive(3)"

>

昨天

</div>

</div>

<div class="exharts" >

<ve-line

ref="chartline"

width="100%"

:data="chartData"

:extend="chartExtend"

:settings="active == 4 ? chartSettings : {}"

:legend-visible="false"

></ve-line>

</div>

</div>

</template>

<script>

import { transactionSituation } from "@/api/data/clearing.js";

import { formatDate } from "@/utils/common.js";

import { mapState, mapMutations } from "vuex";

export default {

data() {

let that = this;

return {

active: 0,

timeActive: 3,

chartData: {

columns: ["date", "user"],

rows: [],

},

chartExtend: {

tooltip: {

backgroundColor: "#48B8B6",

formatter(res) {

let data = res[0].value;

function money(value) {

if (!value) return "0.00";

var intPart = Number(value) - (Number(value) % 1); //获取整数部分（这里是windy93的方法）

var intPartFormat = intPart

.toString()

.replace(/(\d)(?=(?:\d{3})+$)/g, "$1,"); //将整数部分逢三一断

var floatPart = ".00"; //预定义小数部分

var value2Array = value.toString().split(".");

//=2表示数据有小数位

if (value2Array.length == 2) {

floatPart = value2Array[1].toString(); //拿到小数部分

if (floatPart.length == 1) {

//补0,实际上用不着

return intPartFormat + "." + floatPart + "0";

} else {

return intPartFormat + "." + floatPart;

}

} else {

return intPartFormat + floatPart;

}

}

return `${data[0]} ${

that.active == 0 || that.active == 3

? money(data[1]) + "元"

: that.active == 1 || that.active == 2

? data[1] + "笔"

: data[1] * 100 + "%"

}`;

},

},

series: {

smooth: false,

},

},

chartSettings: {

yAxisType: ["percent"],

},

MerchantsDropList: [], //商户下拉表

query: {

startDate: formatDate(+new Date() - 24 * 60 * 60 * 1000, "yyyy-MM-dd"),

endDate: formatDate(+new Date() - 24 * 60 * 60 * 1000, "yyyy-MM-dd"),

mchId:"",

},

mainList: [],

};

},

// 监听头部收起，缩放时，页面宽度的变化

// computed: {

// isCollapse(){return this.$store.state.isActiveHead;}

// },

// watch:{

// isCollapse(newValue, oldValue){

// this.$nextTick(() => {

// this.$refs.chartline.echarts.resize()

// })

// }

// },

created() {

this.getLists();

this.$enter(this.$route.path, this.onSearch);

},

activated() {

this.getLists();

},

methods: {

getLists() {

if (!this.query.startDate || !this.query.endDate) {

this.$message.error("统计日期时间段必选");

return;

}

transactionSituation(this.query)

.then((res) => {

if (res) {

this.mainList = res.resultData;

this.checkActive(this.active);

}

})

.catch((res) => {

console.log(res);

});

},

checkActive(active) {

this.chartData.rows = [];

this.active = active;

let key = "";

if (active == 0) {

key = "tradeAmount";

} else if (active == 1) {

key = "tradeNum";

} else if (active == 2) {

key = "refundNum";

} else if (active == 3) {

key = "refundAmount";

} else if (active == 4) {

key = "successRate";

}

this.mainList.forEach((item) => {

this.chartData.rows.push({

date: item.totalDate,

user:

active == 0 || active == 3 || active == 4

? item[key] / 100

: item[key],

});

});

// 这种方式的监听，在切换 tab 栏时，图表会动态变化

// this.$nextTick(() => {

// this.$refs.chartline.echarts.resize()

// })

},

checkTimeActive(timeActive) {

this.timeActive = timeActive;

switch (timeActive) {

case 0:

this.query.startDate = formatDate(

+new Date() - 30 * 24 * 60 * 60 * 1000,

"yyyy-MM-dd"

);

this.query.endDate = formatDate(

+new Date() - 24 * 60 * 60 * 1000,

"yyyy-MM-dd"

);

break;

case 1:

this.query.startDate = formatDate(

+new Date() - 7 * 24 * 60 * 60 * 1000,

"yyyy-MM-dd"

);

this.query.endDate = formatDate(

+new Date() - 24 * 60 * 60 * 1000,

"yyyy-MM-dd"

);

break;

case 2:

this.query.startDate = formatDate(+new Date(), "yyyy-MM-dd");

this.query.endDate = formatDate(+new Date(), "yyyy-MM-dd");

break;

case 3:

this.query.startDate = formatDate(

+new Date() - 24 * 60 * 60 * 1000,

"yyyy-MM-dd"

);

this.query.endDate = formatDate(

+new Date() - 24 * 60 * 60 * 1000,

"yyyy-MM-dd"

);

break;

}

this.getLists();

},

onSearch() {

this.getLists();

},

},

};

</script>

<style scoped>

.con_from p>i {

padding-right: 12px;

font-size: 14px;

font-family: Microsoft YaHei;

font-weight: 400;

}

.con_from p:last-child{

padding-bottom:0px;

}

.con_from p {

padding-bottom: 20px;

height: 40px;

}

.con_from .el-input__icon{

line-height: 40px !important;

}

.con_from .lineP{

display: flex;

flex-flow: wrap;

margin: 20px 0px 0px;

width: 100%;

}

.con_from .lineP:first-child{

margin: 0px;

}

.con_from .lineP .item {

display: flex;

align-content: center;

height: 40px;

line-height: 40px;

width: 27%;

margin-left: 9.5%;

font-size: 14px;

}

.con_from .lineP .item:first-child{

margin-left: 0%;

}

.con_from .lineP .itembtn {

display: flex;

margin-left: auto;

width: 30%;

align-items: center;

justify-content: flex-end;

}

.con_from .lineP .item > i {

width: 60px;

text-align: right;

margin-right: 10px;

}

.con_from .lineP .item .el-input , .con_from .lineP .item .el-select {

width: calc(100% - 60px - 10px);

}

.con_from .lineP .item .el-select .el-input{

width: 100%;

}

.con_from .lineP .itemTime{

width: 49.723%;

}

.con_from .lineP .itemTime .el-input{

width: calc((100% - 60px - 24.67px - 10px) / 2);

}

.header span {

display: inline-block;

height: 100%;

width: 100px;

text-align: center;

font-size: 14px;

font-family: Microsoft YaHei;

font-weight: 400;

}

.header {

line-height: 40px;

width: 100%;

height: 40px;

border-bottom: 1px solid rgba(220, 224, 230, 1);

position: relative;

top: 0;

margin-top:50px;

}

.header .right {

float: right;

width: 74px;

height: 40px;

color: #333333;

font-size: 12px;

text-align: center;

line-height: 40px;

}

.header .right.active {

color: #48b8b6;

box-sizing: border-box;

}

.header span {

cursor: pointer;

}

.header div {

cursor: pointer;

}

</style>

页面效果图

在点击头部收起/打开的箭头时，会导致折线图的宽，不随着屏幕的改变而改变。echarts图，不能重绘，页面效果如下：

解决方案

一开始的思路，是监听DOM变化，于是在网上搜索了一些方法，但是由于本系统并不会大量地改变DOM，没有必要监听DOM宽高的变化。系统中只有折叠和展开两个状态，所以只需要简单的用一个flag表示，监听其true/false就可以了。我通过在store中创建变量isCollapse来管理折叠与展开。

import Vue from 'vue'

import Vuex from 'vuex'

import createPersistedstate from 'vuex-persistedstate'

Vue.use(Vuex)

export default new Vuex.Store({

state: {

token:"",//存储token

isCollapse: false,// echact监听重绘变量

},

getters:{

getToken(state){

return state.token;

}

},

mutations: {

// 修改token，并将token存入localStorage

setToken(state,token) {

state.token = token;

localStorage.setItem("token",token);

},

// echact监听重绘变量

commitCollapse(state, bool) {

state.isCollapse = bool;

},

},

actions: {},

modules: {},

plugins: [

new createPersistedstate({

token: localStorage.getItem("token"),

}),

],

})