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| <template>
| <div class="air_trend">
| <div class="air_top header_air">
| <img class="air_img" :src="require('@/assets/images/regionalOverview/histogram.png')" alt="">
| <span class="air_text">最近24小时空气变化趋势</span>
| </div>
| <div v-if="this.dataAxis.length > 0" class="air_histogram">
| <div id="myChart" :style="{width: '100%', height: '200px'}" />
| </div>
| <div v-else style="width: 100%">
| <el-empty style="width: 100%" :image-size="60" description="无空气变化数据" />
| </div>
| </div>
| </template>
|
| <script>
| import * as echarts from 'echarts'
| export default {
| name: 'AirChangeTrend',
| data() {
| return {
| dataAxis: [],
| dataValue: [],
| timer: null
| }
| },
| created() {
| },
| mounted() {
| // console.log(this.timer)
| if (this.timer !== null) {
| clearInterval(this.timer)
| this.timer = null
| } else {
| this.query24HoursAQI()
| setTimeout(() => {
| this.initChats()
| }, 800)
| }
| this.timer = setInterval(() => {
| this.query24HoursAQI()
| setTimeout(() => {
| this.initChats()
| }, 1000)
| }, 1000 * 1800)
| },
| beforeDestroy() {
| if (this.timer !== null) {
| clearInterval(this.timer)
| this.timer = null
| }
| },
| methods: {
| // 获取一个城市最近24小时AQI
| query24HoursAQI() {
| this.$request({
| url: '/aqi/query24HoursAQI',
| method: 'get',
| params: {
| regionCode: this.$store.state.regionCode
| }
| }).then(res => {
| if (res.code === 0) {
| const arr = []
| const arr1 = []
| this.dataValue = []
| for (const key in res.data) {
| arr.push(key)
| arr1.push(res.data[key])
| }
| this.dataAxis = arr
| this.dataValue = arr1
| }
| })
| },
| initChats() {
| const chartDom = document.getElementById('myChart')
| const myChart = echarts.init(chartDom)
| // 'aqi': [50, 100, 150, 200, 300]
| let option
| const dataObj = this.dataValue.map(value => {
| const obj = {}
| obj.value = value
| const itemStyle = {
| color: value < 50 ? '#00e400' : value < 100 ? '#ffff00' : value < 150 ? '#ff7e00' : value < 200 ? '#ff0000' : value < 300 ? '#99004c' : '#7e0023'
| }
| obj.itemStyle = itemStyle
| return obj
| })
| option = {
| tooltip: {
| trigger: 'axis',
| backgroundColor: 'rgba(255,255,255,.8)', // 通过设置rgba调节背景颜色与透明度
| color: 'gray',
| borderWidth: '1',
| borderColor: '#d9d9d9',
| textStyle: {
| color: '#808080'
| },
| axisPointer: {
| type: 'none',
| lineStyle: {
| color: 'rgba(128, 128, 128, .6)'
| }
| }
| },
| grid: {
| left: '3%',
| right: '4%',
| bottom: '3%',
| containLabel: true
| },
| xAxis: [
| {
| type: 'category',
| data: this.dataAxis,
| axisTick: {
| alignWithLabel: true
| },
| axisLabel: {
| inside: false,
| color: '#999',
| interval: (num, value) => {
| if (num < 3) {
| return false
| } else {
| if ((num - 3) % 6 === 0) {
| return true
| } else {
| return false
| }
| }
| },
| formatter: function(value) {
| return echarts.format.formatTime('hh:mm', new Date(value))
| }
| },
| axisLine: {
| show: false,
| lineStyle: {
| color: 'rgba(153, 153, 153, 0.4)'
| }
| }
| }
| ],
| yAxis: {
| // 定义网格线条的颜色
| splitLine: {
| show: true,
| lineStyle: {
| color: 'rgba(153, 153, 153, 0.1)',
| width: 1,
| type: 'solid'
| }
| },
| axisLine: {
| show: false
| },
| axisTick: {
| show: false
| },
| axisLabel: {
| color: '#999'
| }
| },
| series: [
| {
| name: 'AQI',
| type: 'bar',
| barWidth: '60%',
| data: dataObj
| }
| ]
| }
| myChart.setOption(option)
| }
| }
| }
| </script>
|
| <style lang="less">
| .air_trend {
| width: 100%;
| margin-top: 6px;
| background-color: #fff;
| //box-shadow: 0 0 5px 1px #999;
| padding: 0;
| border: solid 1px #d9d9d9;
| border-radius: 3px;
| box-sizing: border-box;
| }
| .air_trend > .air_top {
| display: inline-block;
| outline: none;
| width: 100%;
| float: left;
| }
| .header_air {
| position: relative;
| height: 40px;
| background-color: #F8F7F7;
| .air_img {
| position: absolute;
| top: 10px;
| left: 16px;
| width: 20px;
| }
| .air_text {
| position: absolute;
| height: 40px;
| line-height: 40px;
| left: 40px;
| font-size: 15px;
| color: #808080;
| }
| }
| .air_histogram {
| width: 100%;
| height: 200px;
| margin-bottom: 10px;
| }
| </style>
|
|
