Vue 및 ECharts4Taro3 실용 가이드: 모바일 데이터 시각화 성능을 최적화하는 방법

<template>
  <view>
    <ec-canvas ref="chartCanvas" canvas-id="chart" :canvas-type="canvasType" :disable-scroll="true" style="width: 100%; height: 300rpx;"></ec-canvas>
  </view>
</template>

<script>
import * as echarts from 'echarts';

export default {
  name: 'BarChart',
  props: {
    data: {
      type: Array,
      default: () => []
    }
  },
  data() {
    return {
      chart: null,
      canvasType: '2d'
    };
  },
  mounted() {
    this.initChart();
    this.renderChart();
  },
  watch: {
    data() {
      this.renderChart();
    }
  },
  methods: {
    initChart() {
      const canvas = this.$refs.chartCanvas.getCanvas('chart');

      if (canvas.getContext) {
        this.chart = echarts.init(canvas.getContext('2d'));
      }
    },
    renderChart() {
      const option = {
        xAxis: {
          type: 'category',
          data: this.data.map(item => item.x)
        },
        yAxis: {
          type: 'value'
        },
        series: {
          type: 'bar',
          data: this.data.map(item => item.y),
        }
      };

      this.chart.setOption(option);
    }
  }
};
</script>

export default {
  // ...
  computed: {
    aggregatedData() {
      // 每周聚合
      const weekData = [];
      let weekSum = 0;
      let weekCount = 0;

      for (let i = 0; i < this.data.length; i++) {
        weekSum += this.data[i].y;
        weekCount++;

        if (weekCount === 7 || i === this.data.length - 1) {
          const average = weekSum / weekCount;
          const startDate = this.data[i - weekCount + 1].x;
          const endDate = this.data[i].x;

          weekData.push({ x: `${startDate}-${endDate}`, y: average });
          weekSum = 0;
          weekCount = 0;
        }
      }

      return weekData;
    }
  },
  // ...
};

<template>
  <recycle-view :ops="{
    id: 'chartCanvas',
    slot: 'list',
    dataKey: 'itemData',
    poolSize: 20,
    immediateCheck: true,
    itemSize: 40
  }">
    <view :key="`item_${index}`">{{ item.x }}: {{ item.y }}</view>
  </recycle-view>
</template>

<script>
import RecycleView from 'recycle-view';

export default {
  components: {
    RecycleView
  },
  // ...
  computed: {
    itemData() {
      // 根据实际需求返回正确的数据
      return this.data.map((item, index) => {
        return {
          index,
          item
        };
      });
    }
  },
  // ...
};
</script>