首页 前端知识 react echarts 绘制中国地图

react echarts 绘制中国地图

2024-05-29 10:05:26 前端知识 前端哥 853 302 我要收藏

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npm install echarts
import china from '@/utils/China.json';
import * as echarts from 'echarts'; //全局引入 ,可按需引入
import { useEffect, useRef } from 'react';

const Map = (props) => {
  const chartRef = useRef();
  const topNumber = props.data[0].value;
  const bottomNumber = props.data[props.data.length - 1].value;

  const echartsMapClick = () => {
    //点击地图模块逻辑事件
  };

  const mapOption = (mapName, data) => {
    const myChart = echarts.init(chartRef.current);

    echarts.registerMap(mapName, data);
    const option = {
      tooltip: {
        backgroundColor: 'rgba(21, 24, 45, 0.9)', // 提示框浮层的背景颜色。
        textStyle: {
          // 提示框浮层的文本样式。
          color: '#fff',
          fontSize: 14,
        },
        extraCssText: 'border-color: rgba(21, 24, 45, 0.9);',
        formatter: function (params) {
          //数据格式化
          const val = params.value ? params.value : 0;
          if (params.value) {
            return (
              params.name + '<br />' + params.seriesName + ':' + val + '%'
            );
          } else {
            return '暂无数据';
          }
        },
      },
      visualMap: {
        min: 0,
        max: topNumber,
        left: 'left',
        top: 'bottom',
        text: [topNumber + '%', bottomNumber + '%'], //取值范围的文字
        inRange: {
          color: ['#D2DDFF', '#6E92FF'], //取值范围的颜色
        },
        show: true, //图注
      },
      geo: {
        map: 'china',
        roam: false, //不开启缩放和平移
        zoom: 1.23, //视角缩放比例
        label: {
          normal: {
            show: true,
            fontSize: '10',
            color: 'rgba(0,0,0,0.7)',
          },
        },
        itemStyle: {
          normal: {
            borderColor: 'rgba(0, 0, 0, 0.2)',
          },
          emphasis: {
            areaColor: '#4BD6C7', //鼠标选择区域颜色
            shadowOffsetX: 0,
            shadowOffsetY: 0,
            shadowBlur: 20,
            borderWidth: 0,
            shadowColor: 'rgba(0, 0, 0, 0.5)',
          },
        },
      },
      series: [
        {
          name:'人口',
          type: 'map',
          geoIndex: 0,
          data: props.data,
        },
      ],
    };
    myChart.setOption(option); //绘图
    //点击画布内还是画布外
    myChart.getZr().on('click', (params) => {
      if (params.target) {
        myChart.on('click', echartsMapClick); //增加点击事件
      }
    });
  };
  const loadingChina = () => {
    mapOption('china', china); //初始化-创建中国地图
  };

  useEffect(() => {
    loadingChina();
  }, [props.data]);

  return <div style={{ width: '100%', minHeight: '500px' }} ref={chartRef} />;
};
export default Map;

China.json

{
  "type": "FeatureCollection",
  "features": [
    {
      "type": "Feature",
      "id": "xin_jiang",
      "properties": {
        "name": "新疆",
        "cp": [84.9023, 41.748],
        "childNum": 18
      },
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [96.416, 42.7588],
            [96.416, 42.7148],
            [95.9766, 42.4951],
            [96.0645, 42.3193],
            [96.2402, 42.2314],
            [95.9766, 41.9238],
            [95.2734, 41.6162],
            [95.1855, 41.792],
            [94.5703, 41.4844],
            [94.043, 41.0889],
            [93.8672, 40.6934],
            [93.0762, 40.6494],
            [92.6367, 39.6387],
            [92.373, 39.3311],
            [92.373, 39.1113],
            [92.373, 39.0234],
            [90.1758, 38.4961],
            [90.3516, 38.2324],
            [90.6152, 38.3203],
            [90.5273, 37.8369],
            [91.0547, 37.4414],
            [91.3184, 37.0898],
            [90.7031, 36.7822],
            [90.791, 36.6064],
            [91.0547, 36.5186],
            [91.0547, 36.0791],
            [90.8789, 36.0352],
            [90, 36.2549],
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            [85.0781, 35.7275],
            [84.1992, 35.376],
            [83.1445, 35.4199],
            [82.8809, 35.6836],
            [82.4414, 35.7275],
            [82.002, 35.332],
            [81.6504, 35.2441],
            [80.4199, 35.4199],
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            [80.2441, 35.2002],
            [79.8926, 34.8047],
            [79.8047, 34.4971],
            [79.1016, 34.4531],
            [79.0137, 34.3213],
            [78.2227, 34.7168],
            [78.0469, 35.2441],
            [78.0469, 35.5078],
            [77.4316, 35.4639],
            [76.8164, 35.6396],
            [76.5527, 35.8594],
            [76.2012, 35.8154],
            [75.9375, 36.0352],
            [76.0254, 36.4746],
            [75.8496, 36.6943],
            [75.498, 36.7383],
            [75.4102, 36.958],
            [75.0586, 37.002],
            [74.8828, 36.9141],
            [74.7949, 37.0459],
            [74.5313, 37.0898],
            [74.5313, 37.2217],
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            [74.8828, 37.5732],
            [74.9707, 37.749],
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            [74.3555, 38.6719],
            [74.1797, 38.6719],
            [74.0918, 38.54],
            [73.8281, 38.584],
            [73.7402, 38.8477],
            [73.8281, 38.9795],
            [73.4766, 39.375],
            [73.916, 39.5068],
            [73.916, 39.6826],
            [73.8281, 39.7705],
            [74.0039, 40.0342],
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          ]
        ]
      }
    },
    {
      "type": "Feature",
      "id": "xi_zang",
      "properties": {
        "name": "西藏",
        "cp": [88.7695, 31.6846],
        "childNum": 7
      },
      "geometry": {
        "type": "Polygon",
        "coordinates": [
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    {
      "type": "Feature",
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      "properties": {
        "name": "内蒙古",
        "cp": [117.5977, 44.3408],
        "childNum": 12
      },
      "geometry": {
        "type": "Polygon",
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            [121.2891, 30.6738],
            [120.9375, 31.0254]
          ]
        ]
      }
    },
    {
      "type": "Feature",
      "id": "xiang_gang",
      "properties": {
        "name": "香港",
        "cp": [114.2578, 22.3242],
        "childNum": 1
      },
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [114.6094, 22.4121],
            [114.5215, 22.1484],
            [114.3457, 22.1484],
            [113.9063, 22.1484],
            [113.8184, 22.1924],
            [113.9063, 22.4121],
            [114.1699, 22.5439],
            [114.3457, 22.5439],
            [114.4336, 22.5439],
            [114.4336, 22.4121],
            [114.6094, 22.4121]
          ]
        ]
      }
    },
    {
      "type": "Feature",
      "id": "ao_men",
      "properties": {
        "name": "澳门",
        "cp": [113.5547, 22.1484],
        "childNum": 1
      },
      "geometry": {
        "type": "Polygon",
        "coordinates": [
          [
            [113.5986, 22.1649],
            [113.6096, 22.1265],
            [113.5547, 22.11],
            [113.5437, 22.2034],
            [113.5767, 22.2034],
            [113.5986, 22.1649]
          ]
        ]
      }
    }
  ]
}
// 使用 Map
<Map data={dataList} />

dataList数据格式:

[{"name":"北京","value":2000},{"name":"福建","value":4000}]

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使用 mapstructure 解析 json

2024-06-05 13:06:03

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