vue实现饼图

使用 ECharts 实现 Vue 饼图

安装 ECharts 依赖

npm install echarts --save

在 Vue 组件中引入 ECharts

import * as echarts from 'echarts';

创建基础饼图组件

<template>
  <div ref="chartDom" style="width: 600px; height: 400px;"></div>
</template>

<script>
export default {
  mounted() {
    this.initChart();
  },
  methods: {
    initChart() {
      const chart = echarts.init(this.$refs.chartDom);
      const option = {
        title: {
          text: '示例饼图',
          subtext: '数据展示',
          left: 'center'
        },
        tooltip: {
          trigger: 'item',
          formatter: '{a} <br/>{b}: {c} ({d}%)'
        },
        legend: {
          orient: 'vertical',
          left: 'left',
          data: ['直接访问', '邮件营销', '联盟广告', '视频广告', '搜索引擎']
        },
        series: [
          {
            name: '访问来源',
            type: 'pie',
            radius: '50%',
            data: [
              { value: 335, name: '直接访问' },
              { value: 310, name: '邮件营销' },
              { value: 234, name: '联盟广告' },
              { value: 135, name: '视频广告' },
              { value: 1548, name: '搜索引擎' }
            ],
            emphasis: {
              itemStyle: {
                shadowBlur: 10,
                shadowOffsetX: 0,
                shadowColor: 'rgba(0, 0, 0, 0.5)'
              }
            }
          }
        ]
      };
      chart.setOption(option);
    }
  }
};
</script>

使用 Vue-ECharts 封装组件

安装 vue-echarts

npm install vue-echarts echarts --save

创建可复用的饼图组件

<template>
  <v-chart :option="chartOption" autoresize />
</template>

<script>
import { use } from 'echarts/core';
import { PieChart } from 'echarts/charts';
import {
  TitleComponent,
  TooltipComponent,
  LegendComponent
} from 'echarts/components';
import { CanvasRenderer } from 'echarts/renderers';
import VChart from 'vue-echarts';

use([
  TitleComponent,
  TooltipComponent,
  LegendComponent,
  PieChart,
  CanvasRenderer
]);

export default {
  components: {
    VChart
  },
  data() {
    return {
      chartOption: {
        title: {
          text: '自定义饼图',
          left: 'center'
        },
        tooltip: {
          trigger: 'item'
        },
        legend: {
          orient: 'vertical',
          left: 'left'
        },
        series: [
          {
            name: '访问来源',
            type: 'pie',
            radius: ['40%', '70%'],
            avoidLabelOverlap: false,
            itemStyle: {
              borderRadius: 10,
              borderColor: '#fff',
              borderWidth: 2
            },
            label: {
              show: false,
              position: 'center'
            },
            emphasis: {
              label: {
                show: true,
                fontSize: '18',
                fontWeight: 'bold'
              }
            },
            labelLine: {
              show: false
            },
            data: [
              { value: 1048, name: '搜索引擎' },
              { value: 735, name: '直接访问' },
              { value: 580, name: '邮件营销' },
              { value: 484, name: '联盟广告' },
              { value: 300, name: '视频广告' }
            ]
          }
        ]
      }
    };
  }
};
</script>

<style scoped>
.v-chart {
  height: 400px;
}
</style>

动态更新饼图数据

实现数据响应式更新

watch: {
  chartData: {
    handler(newVal) {
      this.updateChart(newVal);
    },
    deep: true
  }
},
methods: {
  updateChart(data) {
    this.chartOption.series[0].data = data;
    this.$nextTick(() => {
      if (this.chart) {
        this.chart.setOption(this.chartOption);
      }
    });
  }
}

饼图常见配置项

设置环形饼图

series: [{
  type: 'pie',
  radius: ['30%', '70%'],
  ...
}]

添加玫瑰图效果

series: [{
  type: 'pie',
  radius: [20, 120],
  roseType: 'radius',
  ...
}]

设置多级饼图

series: [
  {
    type: 'pie',
    radius: ['0%', '30%'],
    ...
  },
  {
    type: 'pie',
    radius: ['40%', '55%'],
    ...
  }
]