绘制图表

在uni-app开发的过程中因为要同时兼容h5+和各类小程序，所以我们要引入两个库，下面的附件即为已下载好的两个库，解压之后放在components文件夹下面即可。

components.zip

template中

<view class="box2">
    <mpvue-echarts :echarts="echarts" :onInit="lineInit" canvasId="line" ref="lineChart" />
</view>

style中

.box2 {
        flex: 1;
        flex-direction: column;
        height: 200px;
    }

script中

import * as echarts from '@/components/echarts/echarts.simple.min.js';
import mpvueEcharts from '@/components/mpvue-echarts/src/echarts.vue';
    let lineOption = {
        animation: false,
        color: ['#37A2DA', '#9FE6B8'],
        grid: {
            x: 35,
            x2: 10,
            y: 30,
            y2: 25
        },
        calculable: false,
        xAxis: [{
            type: 'category',
            data: ['1月', '2月', '3月', '4月', '5月', '6月', '7月', '8月', '9月', '10月', '11月', '12月']
        }],
        yAxis: [{
            type: 'value',
            splitArea: {
                show: true
            }
        }],
        series: [{
            name: '蒸发量',
            type: 'line',
            data: [2.0, 4.9, 7.0, 23.2, 25.6, 76.7, 135.6, 162.2, 32.6, 20.0, 6.4, 3.3]
        }, {
            name: '降水量',
            type: 'line',
            data: [2.6, 5.9, 9.0, 26.4, 28.7, 70.7, 175.6, 182.2, 48.7, 18.8, 6.0, 2.3]
        }]
    };
    export default {
        data() {
            return {
                //初始化echarts
                echarts: echarts,
            }
        },
        methods: {
            lineInit(canvas, width, height) {
                let lineChart = echarts.init(canvas, null, {
                    width: width,
                    height: height
                })
                canvas.setChart(lineChart)
                lineChart.setOption(lineOption)
                return lineChart
            }
        },
        //导入mpvue的mpvueEcharts组件。
        components: {
            mpvueEcharts
        }
    }