Vue项目中按需使用Echarts.js踩坑记录
Echarts.js 使用记录小结
Echart简介
百度开发的一套图表，使用方便，包括各种图表，常用的有：折线图，饼图，柱状图等等，具体可以参考[官网](https://www.echartsjs.com/examples/zh/index.html)
EChart 使用简介
一、 导入第三方包
npm install echarts -S
//或者采用淘宝镜像的方式导入
cnpm install echarts -S
二、导入Echarts组件
在需要用到图表的页面进行引入
//单页面引入
import echarts from 'echarts'
//全局引入，在main.js中
import echarts from 'echarts' //引入echarts
Vue.prototype.$echarts = echarts //引入组件
这是引入了所有的图表，文件较大，进阶一点的就是按需引入图表 ，如下：以按需引入K线图为例
具体可以参考Echarts附录
//注：这里用 require 不用 import 引入是因为 import 需要详细的路径
//引入基本模板
let echarts = require('echarts/lib/echarts')
// 引入折线图,饼图等组件
require('echarts/lib/chart/candlestick')
require('echarts/lib/chart/line')
// 引入提示框和title组件，图例
require('echarts/lib/chart/effectScatter') // 拐点出闪烁，高亮
require('echarts/lib/component/tooltip') // 提示组件
require('echarts/lib/component/legend') // 图例组件
require('echarts/lib/component/markPoint') // 标注点组件
require('echarts/lib/component/markLine') // 标注线组件
require('echarts/lib/component/graphic'); //图形组件
require('echarts/lib/component/grid'); //网格组件
require('echarts/lib/component/dataZoom'); //底下滑动框组件
三、 配置option
这个是最难的，也是主要的，可以复制官方示例，在进行数据的修改 ，附上官方示例链接
**最后给到我在vue按需使用K线图源码，写的不好，仅供参考 **
<template>
<div id="main">
<div id='myChart' ref="myChart"></div>
</div>
</template>
<script>
//全局引入
// import echarts from 'echarts'
//引入基本模板
let echarts = require('echarts/lib/echarts')
// 引入折线图等组件
require('echarts/lib/chart/candlestick')
require('echarts/lib/chart/line')
// require('echarts/lib/chart/bar')
// require('echarts/lib/chart/radar')
// 引入提示框和title组件，图例
require('echarts/lib/chart/effectScatter') // 拐点出闪烁，高亮
require('echarts/lib/component/tooltip') // 提示组件
require('echarts/lib/component/legend') // 图例组件
require('echarts/lib/component/markPoint') // 标注点组件
require('echarts/lib/component/markLine') // 标注线组件
require('echarts/lib/component/graphic'); //图形组件
require('echarts/lib/component/grid'); //网格组件
require('echarts/lib/component/dataZoom'); //底下滑动框组件
export default {
name: 'echarts',
data () {
return {
resData: '',
echartsOption: {
// 图表标题
title: {
text: '',
left: 0,
top: 20
},
// 提示框
tooltip: {
confine: true,
trigger: 'axis',// 触发类型，默认数据触发，见下图，可选为：'item' ¦ 'axis'
axisPointer: {
type: 'cross'
}
},
// 图例
legend: {
data: ['日K', 'MA5', 'MA10', 'MA20', 'MA30']
},
// 网格
grid: {
left: '1%',
right: '5%',
bottom: '0%',
containLabel: true
},
xAxis: {
type: 'category',
data: [],
scale: true,
boundaryGap: false,
axisLine: {
onZero: false },
splitLine: {
show: false },
splitNumber: 20,
min: 'dataMin',
max: 'dataMax'
},
yAxis: {
scale: true,
splitArea: {
show: true
}
},
// 区域缩放控制器
dataZoom: [
{
type: 'inside',
start: 50,
end: 100
},
{
show: true,
type: 'slider',
y: '90%',
start: 0,
end: 75
}
],
//系列
series: [
{
name: '日K',
type: 'candlestick',
data: [],
itemStyle: {
normal: {
color: '#ec0000',// 阳线填充颜色
color0: '#00da3c',// 阴线填充颜色
borderColor: '#8A0000',//这肯定是背景色咯
borderColor0: '#008F28'
}
},
//标记点
markPoint: {
label: {
normal: {
formatter: function (param) {
return param != null ? Math.round(param.value) : ''
}
}
},
data: [
{
name: 'highest value',
type: 'max',
valueDim: 'highest'
},
{
name: 'lowest value',
type: 'min',
valueDim: 'lowest'
},
{
name: 'average value on close',
type: 'average',
valueDim: 'close'
}
],
// 提示框
tooltip: {
formatter: function (param) {
return param.name + '
' + (param.data.coord || '')
}
}
},
//标记线
markLine: {
// 标线起始和结束的symbol介绍类型，如果都一样，可以直接传string
symbol: ['none', 'none'],
data: [
[
{
name: 'from lowest to highest',
type: 'min',
valueDim: 'lowest',
symbol: 'circle',
symbolSize: 10,
label: {
normal: {
show: false },
emphasis: {
show: false }
}
},
{
type: 'max',
valueDim: 'highest',
symbol: 'circle',
symbolSize: 10,
label: {
normal: {
show: false },
emphasis: {
show: false }
}
}
]
]
}
},
{
name: 'MA5',
type: 'line',
data: [],
smooth: true,
lineStyle: {
normal: {
opacity: 0.5}
}
},
{
name: 'MA10',
type: 'line',
data: [],
smooth: true,
lineStyle: {
normal: {
opacity: 0.5}
}
},
{
name: 'MA20',
type: 'line',
data: [],
smooth: true,
lineStyle: {
normal: {
opacity: 0.5}
}
},
{
name: 'MA30',
type: 'line',
data: [],
smooth: true,
lineStyle: {
normal: {
opacity: 0.5}
}
},
]
}
}
},
mounted () {
this.setEchartOption()
},
methods: {
//setEchartOption 方法名 并没有什么特殊
setEchartOption () {
// 数据意义：开盘(open)，收盘(close)，最低(lowest)，最高(highest)
//因为还是本地项目，用的是mock模拟了一下请求操作，但实际数据还是太少，所以在下面用的还是一些静态数据
this.$http.post('/service/open/pairskline').then( res => {
let data = res.data.pairskline.result.bars;
let arr =[];
for(let i=0;i<data.length;i++){
for( let n in data[i]){
arr[i] = new Array();
arr[i].push(data[i].datetime)
arr[i].push(Number(data[i].open) )
arr[i].push(Number(data[i].close) )
arr[i].push(Number(data[i].high) )
arr[i].push(Number(data[i].low) )
}
}
this.resData = splitData([
['2013/1/24', 2320.26, 2320.26, 2287.3, 2362.94],
['2013/1/25', 2300, 2291.3, 2288.26, 2308.38],
['2013/1/28', 2295.35, 2346.5, 2295.35, 2346.92],
['2013/1/29', 2347.22, 2358.98, 2337.35, 2363.8],
['2013/1/30', 2360.75, 2382.48, 2347.89, 2383.76],
['2013/1/31', 2383.43, 2385.42, 2371.23, 2391.82],
['2013/2/1', 2377.41, 2419.02, 2369.57, 2421.15],
['2013/2/4', 2425.92, 2428.15, 2417.58, 2440.38],
['2013/2/5', 2411, 2433.13, 2403.3, 2437.42],
['2013/2/6', 2432.68, 2434.48, 2427.7, 2441.73],
['2013/2/7', 2430.69, 2418.53, 2394.22, 2433.89],
['2013/2/8', 2416.62, 2432.4, 2414.4, 2443.03],
['2013/2/18', 2441.91, 2421.56, 2415.43, 2444.8],
['2013/2/19', 2420.26, 2382.91, 2373.53, 2427.07],
['2013/2/20', 2383.49, 2397.18, 2370.61, 2397.94],
['2013/2/21', 2378.82, 2325.95, 2309.17, 2378.82],
['2013/2/22', 2322.94, 2314.16, 2308.76, 2330.88],
['2013/2/25', 2320.62, 2325.82, 2315.01, 2338.78],
['2013/2/26', 2313.74, 2293.34, 2289.89, 2340.71],
['2013/2/27', 2297.77, 2313.22, 2292.03, 2324.63],
['2013/2/28', 2322.32, 2365.59, 2308.92, 2366.16],
['2013/3/1', 2364.54, 2359.51, 2330.86, 2369.65],
['2013/3/4', 2332.08, 2273.4, 2259.25, 2333.54],
['2013/3/5', 2274.81, 2326.31, 2270.1, 2328.14],
['2013/3/6', 2333.61, 2347.18, 2321.6, 2351.44],
['2013/3/7', 2340.44, 2324.29, 2304.27, 2352.02],
['2013/3/8', 2326.42, 2318.61, 2314.59, 2333.67],
['2013/3/11', 2314.68, 2310.59, 2296.58, 2320.96],
['2013/3/12', 2309.16, 2286.6, 2264.83, 2333.29],
['2013/3/13', 2282.17, 2263.97, 2253.25, 2286.33],
['2013/3/14', 2255.77, 2270.28, 2253.31, 2276.22],
])
//这句是接口中的数据，但是我这接口数据只有几条，就没用，还是用了上面的一些静态数据
// this.resData = splitData(arr);
this.echartsOption.xAxis.data = this.resData.categoryData
this.echartsOption.series[0].data = this.resData.values
var a = this.resData.values
this.echartsOption.series[1].data =calculateMA(5)
this.echartsOption.series[2].data =calculateMA(10)
this.echartsOption.series[3].data =calculateMA(20)
this.echartsOption.series[4].data =calculateMA(30)
//时间也有了，数据也有了，怎么不渲染？
// console.log(this.resData.categoryData)
var myChart = echarts.init(document.getElementById('myChart'))
myChart.setOption(this.echartsOption)
function splitData (rawData) {
var categoryData = []
var values = []
for (var i = 0; i < rawData.length; i++) {
categoryData.push(rawData[i].splice(0, 1)[0])
values.push(rawData[i])
// console.log(categoryData)
// console.log(values)
}
return {
categoryData: categoryData,
values: values
}
}
function calculateMA(dayCount) {
var result = [];
for (var i = 0, len = a.length; i < len; i++) {
if (i < dayCount) {
result.push('-');
continue;
}
var sum = 0;
for (var j = 0; j < dayCount; j++) {
sum += a[i - j][1];
}
result.push(sum / dayCount);
}
return result;
}
})
}
}
}
</script>
<style lang="less" scoped>
#myChart{
width: 100vw;
height: 450px;
padding: 0 4px;
}
</style>