小程序echarts

1 demo.js

// pages/demo01/demo01.js
import * as echarts from '../../ec-canvas/echarts';
function initChart(canvas, width, height) {
  const chart = echarts.init(canvas, null, {
    width: width,
    height: height
  });
  canvas.setChart(chart);
  var option = {
    title: {
      // text: '数据统计',
      left: 'center'
    },
    color: ["#37A2DA"],
    legend: {
      // 设置小矩形A，B的样式以及数据
      data: ['A','B'],
      top: 20,
      left: 'center',
      backgroundColor: '#dbdbdb',
      z: 100
    },
    grid: {
        left: 0,//折线图距离左边距
        right: 50,//折线图距离右边距
        top: 30,//折线图距离上边距
        bottom: 10,
        containLabel: true
    },
    tooltip: {
      show: true,//是否显示提示框
      trigger: 'axis'
    },
    xAxis: {
      name: '相位',
      type: 'category',
      boundaryGap: false,
      data: ['0°', '90°', '180°', '270°', '360°'],
      // axisTick: {
      //   alignWithLabel:false
      // },
      axisLine: {
        lineStyle: {
          color: '#666666'
        },
        onZero:false//以x轴为坐标零点 默认是以y轴
      },
      //设置x轴的样式
      axisLabel: {
        //横坐标最后的标注颜色变深
        // interval: 0,
        show: true,
        textStyle: {
          color: '#000',
          fontSize: '14',
        }
      },
      show: true
    },
    yAxis: {
      name: '值',
      x: 'center',
      type: 'value',
      min:10,//y轴最小值
      max:60,//y轴最大值
      interval:10,
      splitLine: {
        lineStyle: {
          type: 'solid'
        }
      },
      //设置y轴字体样式
      axisLabel: {
        show: true,
        textStyle: {
          color: '#000',
          fontSize: '14'
        },
        formatter:'{value}千克'
        
      },
      show: true
    },
    series: [{
      name: 'A',
      type: 'line',
      smooth: true,
      data: [-50,-18, 45, 65, 30, 78, 40, 0]
    },{
        name: 'B',
        type: 'line',
        smooth: true,
        data: [-26, -12, 40, 56, 85, 65, 20, 10]
      }]
  };
  chart.setOption(option);
  return chart;
}

Page({

  /**
   * 页面的初始数据
   */
  data: {
    ec: {
      onInit: initChart
    }

  },
 
  /**
   * 生命周期函数--监听页面加载
   */

})

2 demo.wxcc

ec-canvas {
  width: 100%;
  height: 50%;
}
.container {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;

  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  box-sizing: border-box;
} 
.picker-pos{
  margin-top: -130rpx;
  margin-left: 150rpx;
  color: blueviolet
}

3 demo.wxml

<view>
  <view class="container">
    <ec-canvas id="mychart-dom-line" canvas-id="mychart-line" ec="{{ ec }}"></ec-canvas>
  </view>
</view>

4 demo.json

{
  "usingComponents": {"ec-canvas":"../../ec-canvas/ec-canvas"}
}