微信小程序---ECharts

小程序中使用ECharts 动态加载数据 多个图表

首先需要引入，下载地址 ecomfe/echarts-for-weixin 只需要拷贝这一个文件夹就OK了 放在你项目合适的位置，

 

 

在使用的页面json进行配置，允许使用组件 ec-canvas ;

//wxml 创建组件

<view class="container">
    <ec-canvas id="mychart-dom-multi-bar" canvas-id="mychart-multi-bar" ec="{{ ecBar }}"></ec-canvas>
    <ec-canvas id="mychart-dom-multi-scatter" canvas-id="mychart-multi-scatter" ec="{{ ecScatter }}"></ec-canvas>
</view>

 

 

//js

import * as echarts from '../../ec-canvas/echarts';

Page({
    data: {
    ecBar: {
    lazyLoad: true // 延迟加载
},

ecScatter: {
    lazyLoad: true
}
},
onLoad(){
    this.barComponent = this.selectComponent('#mychart-dom-multi-bar');
    this.scaComponnet = this.selectComponent('#mychart-dom-multi-scatter');
    this.init_bar();
    this.init_sca();
},
init_bar: function (){
    this.barComponent.init((canvas, width, height) => {
    // 初始化图表
        const barChart = echarts.init(canvas, null, {
        width: width,
        height: height
    });
    barChart.setOption(this.getBarOption());
    // 返回 chart 实例
    return barChart;
});
},
init_sca: function () {
    this.scaComponnet.init((canvas, width, height) => {
    // 初始化图表
        const scaChart = echarts.init(canvas, null, {
        width: width,
        height: height
    });
    scaChart.setOption(this.getScaOption());
    // 返回 chart 实例
    return scaChart;
});
},
getBarOption:function(){
//请求数据
    return {
        color: ['#37a2da', '#32c5e9', '#67e0e3'],
        tooltip: {
        trigger: 'axis',
        axisPointer: { // 坐标轴指示器，坐标轴触发有效
        type: 'shadow' // 默认为直线，可选为：'line' | 'shadow'
    }
},
legend: {
    data: ['热度', '正面', '负面']
},
grid: {
    left: 20,
    right: 20,
    bottom: 15,
    top: 40,
    containLabel: true
},
xAxis: [
    {
        type: 'value',axisLine: {lineStyle: {color: '#999'}},
        axisLabel: {color: '#666'}
    }
],
yAxis: [
    {
        type: 'category',
        axisTick: { show: false },
        data: ['汽车之家', '今日头条', '百度贴吧', '一点资讯', '微信', '微博', '知乎'],
        axisLine: {
            lineStyle: {color: '#999'}
        },
        axisLabel: {
            color: '#666'
        }
    }
],
series: [
    {
        name: '热度',
        type: 'bar',
        label: {normal: {show: true, position: 'inside'}},
        data: [300, 270, 340, 344, 300, 320, 310]
    },
    {
        name: '正面',
        type: 'bar',
        stack: '总量',
        label: {normal: {show: true}},
        data: [120, 102, 141, 174, 190, 250, 220]
    },
    {
        name: '负面',
        type: 'bar',
        stack: '总量',
        label: {normal: {show: true, position: 'left'}},
        data: [-20, -32, -21, -34, -90, -130, -110]
    }
]
};
},

 getScaOption:function () {
//请求数据
var data = [];
var data2 = [];

for (var i = 0; i < 10; i++) {
    data.push(
        [
        Math.round(Math.random() * 100),
        Math.round(Math.random() * 100),
        Math.round(Math.random() * 40)
        ]
    );
    data2.push(
        [
        Math.round(Math.random() * 100),
        Math.round(Math.random() * 100),
        Math.round(Math.random() * 100)
    ]
    );
}

var axisCommon = {
    axisLabel: {
        textStyle: {color: '#C8C8C8'}
    },
    axisTick: {
        lineStyle: {color: '#fff'}
    },
    axisLine: {
        lineStyle: {color: '#C8C8C8'}
    },
    splitLine: {
        lineStyle: {color: '#C8C8C8',type: 'solid'}
    }
};

return {
    color: ["#FF7070", "#60B6E3"],
    backgroundColor: '#eee',
    xAxis: axisCommon,
    yAxis: axisCommon,
    legend: {
        data: ['aaaa', 'bbbb']
    },
    visualMap: {
        show: false,
        max: 100,
        inRange: {symbolSize: [20, 70]}
    },
    series: [
        {type: 'scatter',name: 'aaaa',data: data},
        {name: 'bbbb',type: 'scatter',data: data2}
    ],
    animationDelay: function (idx) {
        return idx * 50;
    },
    animationEasing: 'elasticOut'
};
},
});