微信小程序实现折线图的示例代码

<canvas
 style="width: 400px; height: 500px;"
 canvas-id="yueEle"
 binderror="canvasIdErrorCallback"
></canvas>

getMothElectro:function(){
 var windowWidth = 320;
 try {
 var res = wx.getSystemInfoSync();
 windowWidth = res.windowWidth;
 } catch (e) {
 console.error('getSystemInfoSync failed!');
 }
 yuelineChart = new wxCharts({ //当月用电折线图配置
 canvasId: 'yueEle',
 type: 'line',
 categories: ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23', '24', '25', '26', '27', '28', '29', '30', '31'], //categories X轴
 animation: true,
 // background: '#f5f5f5',
 series: [{
 name: '总用电量',
 //data: yuesimulationData.data,
 data: [1, 6, 9, 1, 0, 2, 9, 2, 8, 6, 0, 9, 8, 0, 3, 7, 3, 9, 3, 8, 9, 5, 4, 1, 5, 8, 2, 4, 9, 8, 7],
 format: function (val, name) {
 return val.toFixed(2) + 'kWh';
 }
 }, {
 name: '电池供电量',
 data: [0, 6, 2, 2, 7, 6, 2, 5, 8, 1, 8, 4, 0, 9, 7, 2, 5, 2, 8, 2, 5, 2, 9, 4, 4, 9, 8, 5, 5, 5, 6],
 format: function (val, name) {
 return val.toFixed(2) + 'kWh';
 }
 },
 {
 name: '光伏供电量',
 data: [6, 4, 9, 7, 1, 4, 5, 1, 1, 8, 8, 6, 6, 2, 2, 2, 0, 5, 5, 8, 8, 8, 8, 9, 0, 4, 6, 9, 2, 1, 6],
 format: function (val, name) {
 return val.toFixed(2) + 'kWh';
 }
 },
 {
 name: '市电供电量',
 data: [0, 4, 3, 3, 1, 7, 7, 7, 9, 9, 3, 3, 0, 0, 5, 6, 0, 4, 1, 2, 0, 1, 3, 9, 2, 5, 1, 8, 3, 4, 2],
 format: function (val, name) {
 return val.toFixed(2) + 'kWh';
 }
 }],
 xAxis: {
 disableGrid: true
 },
 yAxis: {
 title: '当月用电(kWh)',
 format: function (val) {
 return val.toFixed(2);
 },
 max: 20,
 min: 0
 },
 width: windowWidth,
 height: 200,
 dataLabel: false,
 dataPointShape: true,
 extra: {
 lineStyle: 'curve'
 }
 });
 }

yueTouchHandler: function (e) { //当月用电触摸显示
 console.log(daylineChart.getCurrentDataIndex(e));
 yuelineChart.showToolTip(e, { //showToolTip图表中展示数据详细内容
 background: '#7cb5ec',
 format: function (item, category) {
 return category + '日 ' + item.name + ':' + item.data
 }
 });
 },