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   }  }); },