uniAPP·使用uCharts实现统计图表 复制官方代码直接显示（原生模式）

<template>
  <view>
    <canvas canvas-id="PrXJpHQibjLQlkYMvKmNmOYeUnzhwGlM" id="PrXJpHQibjLQlkYMvKmNmOYeUnzhwGlM" class="charts" @touchend="tap"/>
  </view>
</template>

<script>
import uCharts from '@/pages/js/u-charts-v2.4.3.min.js';

var uChartsInstance = {};
export default {
  data() {
    return {
      cWidth: 750,
      cHeight: 500
    };
  },
  onReady() {
    //这里的 750 对应 css .charts 的 width
    this.cWidth = uni.upx2px(750);
    //这里的 500 对应 css .charts 的 height
    this.cHeight = uni.upx2px(500);
    this.getServerData();
  },
  methods: {
    getServerData() {
      //模拟从服务器获取数据时的延时
      setTimeout(() => {
        //模拟服务器返回数据，如果数据格式和标准格式不同，需自行按下面的格式拼接
        let res = {
            categories: ["2016","2017","2018","2019","2020","2021"],
            series: [
              {
                name: "目标值",
                data: [35,36,31,33,13,34]
              },
              {
                name: "完成量",
                data: [18,27,21,24,6,28]
              }
            ]
          };
        this.drawCharts('PrXJpHQibjLQlkYMvKmNmOYeUnzhwGlM', res);
      }, 500);
    },
    drawCharts(id,data){
      const ctx = uni.createCanvasContext(id, this);
      uChartsInstance[id] = new uCharts({
        type: "column",
        context: ctx,
        width: this.cWidth,
        height: this.cHeight,
        categories: data.categories,
        series: data.series,
        animation: true,
        timing: "easeOut",
        duration: 1000,
        rotate: false,
        rotateLock: false,
        background: "#FFFFFF",
        color: ["#1890FF","#91CB74","#FAC858","#EE6666","#73C0DE","#3CA272","#FC8452","#9A60B4","#ea7ccc"],
        padding: [15,15,0,5],
        fontSize: 13,
        fontColor: "#666666",
        dataLabel: true,
        dataPointShape: true,
        dataPointShapeType: "solid",
        touchMoveLimit: 60,
        enableScroll: false,
        enableMarkLine: false,
        legend: {
          show: true,
          position: "bottom",
          float: "center",
          padding: 5,
          margin: 5,
          backgroundColor: "rgba(0,0,0,0)",
          borderColor: "rgba(0,0,0,0)",
          borderWidth: 0,
          fontSize: 13,
          fontColor: "#666666",
          lineHeight: 11,
          hiddenColor: "#CECECE",
          itemGap: 10
        },
        xAxis: {
          disableGrid: true,
          disabled: false,
          axisLine: true,
          axisLineColor: "#CCCCCC",
          calibration: false,
          fontColor: "#666666",
          fontSize: 13,
          rotateLabel: false,
          rotateAngle: 45,
          itemCount: 5,
          boundaryGap: "center",
          splitNumber: 5,
          gridColor: "#CCCCCC",
          gridType: "solid",
          dashLength: 4,
          gridEval: 1,
          scrollShow: false,
          scrollAlign: "left",
          scrollColor: "#A6A6A6",
          scrollBackgroundColor: "#EFEBEF",
          formatter: ""
        },
        yAxis: {
          data: [
            {
              min: 0
            }
          ],
          disabled: false,
          disableGrid: false,
          splitNumber: 5,
          gridType: "solid",
          dashLength: 8,
          gridColor: "#CCCCCC",
          padding: 10,
          showTitle: false
        },
        extra: {
          column: {
            type: "group",
            width: 30,
            activeBgColor: "#000000",
            activeBgOpacity: 0.08,
            seriesGap: 2,
            categoryGap: 3,
            barBorderCircle: false,
            linearType: "none",
            linearOpacity: 1,
            colorStop: 0,
            meterBorder: 1,
            meterFillColor: "#FFFFFF"
          },
          tooltip: {
            showBox: true,
            showArrow: true,
            showCategory: false,
            borderWidth: 0,
            borderRadius: 0,
            borderColor: "#000000",
            borderOpacity: 0.7,
            bgColor: "#000000",
            bgOpacity: 0.7,
            gridType: "solid",
            dashLength: 4,
            gridColor: "#CCCCCC",
            fontColor: "#FFFFFF",
            splitLine: true,
            horizentalLine: false,
            xAxisLabel: false,
            yAxisLabel: false,
            labelBgColor: "#FFFFFF",
            labelBgOpacity: 0.7,
            labelFontColor: "#666666"
          },
          markLine: {
            type: "solid",
            dashLength: 4,
            data: []
          }
        }
      });
    },
    tap(e){
      uChartsInstance[e.target.id].touchLegend(e);
      uChartsInstance[e.target.id].showToolTip(e);
    }
  }
};
</script>

<style scoped>
  .charts{
    width: 750rpx;
    height: 500rpx;
  }
</style>