小程序中使用ECharts 动态加载数据 多个图表
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()); // 注意这里一定要返回 chart 实例，否则会影响事件处理等 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()); // 注意这里一定要返回 chart 实例，否则会影响事件处理等 return scaChart; }); }, getBarOption:function(){ //return 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' }; },});
