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浅谈APP之历史股票通过echarts绘图

需求描述

今天我们需要做一个简单的历史股票收盘价格通过echarts进行绘图，效果如下：

业务实现

代码框架

代码框架如下：
.

依赖包下载

我们通过网站下载自己需要的涉及的图标，勾选之后进行下载：echarts
下载的依赖包echarts.min.js我们放到static/echarts下

代码实现

echarts.vue实现

实现代码如下：

<template><view><view class="echarts" :prop="option" :change:prop="echarts.update"></view></view>
</template><script>export default {name: 'Echarts',props: {option: {type: Object,required: true}}}
</script><script module="echarts" lang="renderjs">export default {data() {return {chart: null}},mounted() {if (typeof window.echarts === 'object') {this.init()} else {// 动态引入类库const script = document.createElement('script')// script.src = './static/echarts/echarts.min.js'// script.src = './static/echarts/echarts.min.js'script.src = './static/echarts/echarts.min.js'script.onload = this.initdocument.head.appendChild(script)}},methods: {/*** 初始化echarts*/init() {this.chart = echarts.init(this.$el)this.update(this.option)},/*** 监测数据更新* @param {Object} option*/update(option) {if (this.chart) {// 因App端，回调函数无法从renderjs外传递，故在此自定义设置相关回调函数if (option) {// tooltipif (option.tooltip) {// 判断是否设置tooltip的位置if (option.tooltip.positionStatus) {option.tooltip.position = this.tooltipPosition()}// 判断是否格式化tooltipif (option.tooltip.formatterStatus) {option.tooltip.formatter = this.tooltipFormatter(option.tooltip.formatterUnit, option.tooltip.formatFloat2, option.tooltip.formatThousands)}}// 设置新的optionthis.chart.setOption(option, option.notMerge)}}},/*** 设置tooltip的位置，防止超出画布*/tooltipPosition() {return (point, params, dom, rect, size) => {//其中point为当前鼠标的位置，size中有两个属性：viewSize和contentSize，分别为外层div和tooltip提示框的大小let x = point[0]let y = point[1]let viewWidth = size.viewSize[0]let viewHeight = size.viewSize[1]let boxWidth = size.contentSize[0]let boxHeight = size.contentSize[1]let posX = 0 //x坐标位置let posY = 0 //y坐标位置if (x < boxWidth) { //左边放不开posX = 5} else { //左边放的下posX = x - boxWidth}if (y < boxHeight) { //上边放不开posY = 5} else { //上边放得下posY = y - boxHeight}return [posX, posY]}},/*** tooltip格式化* @param {Object} unit 数值后的单位* @param {Object} formatFloat2 是否保留两位小数* @param {Object} formatThousands 是否添加千分位*/tooltipFormatter(unit, formatFloat2, formatThousands) {return params => {let result = ''unit = unit ? unit : ''for (let i in params) {if (i == 0) {result += params[i].axisValueLabel}let value = '--'if (params[i].data !== null) {value = params[i].data// 保留两位小数if (formatFloat2) {value = this.formatFloat2(value)}// 添加千分位if (formatThousands) {value = this.formatThousands(value)}}// #ifdef H5result += '\n' + params[i].seriesName + '：' + value + ' ' + unit// #endif// #ifdef APP-PLUSresult += '<br/>' + params[i].marker + params[i].seriesName + '：' + value + ' ' + unit// #endif}return result}},/*** 保留两位小数* @param {Object} value*/formatFloat2(value) {let temp = Math.round(parseFloat(value) * 100) / 100let xsd = temp.toString().split('.')if (xsd.length === 1) {temp = (isNaN(temp) ? '0' : temp.toString()) + '.00'return temp}if (xsd.length > 1) {if (xsd[1].length < 2) {temp = temp.toString() + '0'}return temp}},/*** 添加千分位* @param {Object} value*/formatThousands(value) {if (value === undefined || value === null) {value = ''}if (!isNaN(value)) {value = value + ''}let re = /\d{1,3}(?=(\d{3})+$)/glet n1 = value.replace(/^(\d+)((\.\d+)?)$/, function(s, s1, s2) {return s1.replace(re, '$&,') + s2})return n1}}}
</script><style lang="scss" scoped>.echarts {width: 100%;height: 100%;}
</style>

index.vue实现

实现代码如下：

<template><view><view class="uni-list"><view class="uni-list-cell"><view class="uni-list-cell-db"><input class="uni-input" type="number" placeholder="请输入股票代码" @blur="moveAway"/><picker class="pickerDate" mode="date" :value="date1" :start="startDate" :end="endDate"@change="bindDateChangeStart"><view class="uni-input">开始时间：{{date1}}</view></picker><picker class="pickerDate" mode="date" :value="date2" :start="startDate" :end="endDate"@change="bindDateChangeEnd"><view class="uni-input">结束时间：{{date2}}</view></picker></view><button type="primary" @click="searchHistoryPrice">查询</button></view></view><view class="content"><echarts :option="option3" style="height: 400px;"></echarts></view></view></template><script>function getDate() {const date = new Date();let year = date.getFullYear();let month = date.getMonth() + 1;let day = date.getDate() - 1;month = month > 9 ? month : '0' + month;  day = day > 9 ? day : '0' + day;return `${year}-${month}-${day}`;}function getStartDate() {const date = new Date();let year = date.getFullYear() - 10;let month = date.getMonth() + 1;let day = date.getDate() - 1;month = month > 9 ? month : '0' + month;  day = day > 9 ? day : '0' + day;return `${year}-${month}-${day}`;}export default {data() {return {index: 0,codePrice: '',date1: getDate(),date2: getDate(),startDate: getStartDate(),endDate:  getDate(),option3: {xAxis: {type: 'category',data: []},yAxis: {type: 'value'},series: [{data: [],type: 'line'}]},}},methods: {bindDateChangeStart: function (e) {this.date1 = e.detail.valueconsole.log(this.date1)},bindDateChangeEnd: function (e) {this.date2 = e.detail.valueconsole.log(this.date2)},moveAway: function (e) {this.codePrice = e.detail.valueconsole.log(e.detail.value)},searchHistoryPrice: function (e) {uni.request({url: 'https://route.showapi.com/131-47?appKey=key&begin=' + this.date1 + '&type=bfq&end=' + this.date2 + '&code=' + this.codePrice,method:'GET',success: (res) => {if(res.statusCode === 200){const dataList = res.data.showapi_res_body.list;const datePrice = dataList.map(datePrice => datePrice.date);const closePrice = dataList.map(closePirce => closePirce.close_price);this.option3.series[0].data = closePrice;this.option3.xAxis.data = datePrice;    }else{console.error('请求失败',res);}},fail: (err) => {console.error('请求出错',err);}});}}}
</script><style>.uni-picker-tips {font-size: 20px;color: #666;margin-bottom: 15px;padding: 0 15px;}view,input{font-size: 20px;color: #666;margin-bottom: 15px;padding: 0 15px;}input{border: #4CD964;}
</style>

pages.json实现

实现代码如下：

{"pages": [ //pages数组中第一项表示应用启动页，参考：https://uniapp.dcloud.io/collocation/pages{"path": "pages/index/index","style": {"navigationBarTitleText": "历史股价查询"}}],"globalStyle": {"navigationBarTextStyle": "black","navigationBarTitleText": "历史股价查询","navigationBarBackgroundColor": "#F8F8F8","backgroundColor": "#F8F8F8"}
}

至此，我们的业务实现完成。