探索React Native地图聚类库 - React Native Map Clustering

import React, { Component } from 'react';
import { StyleSheet, Text, View } from 'react-native';
import MapView, { PROVIDER_GOOGLE, Marker } from 'react-native-maps';
import clusteredMap from 'react-native-maps-clustering';
 
class MapClusteringExample extends Component {
  constructor(props) {
    super(props);
    this.state = {
      region: {
        latitude: 37.78825,
        longitude: -122.4324,
        latitudeDelta: 0.2,
        longitudeDelta: 0.2,
      },
      clusters: [],
      zoom: 10,
    };
  }
 
  onRegionChangeComplete = (region) => {
    this.setState({ region });
  };
 
  render() {
    const { region, clusters, zoom } = this.state;
    const points = [
      {
        latitude: 37.78825,
        longitude: -122.4324,
      },
      // ... 更多点
    ];
 
    const ClusteredMap = clusteredMap({
      points,
      zoom,
      region,
      onRegionChange: this.onRegionChangeComplete,
      clusteringRadius: 50,
      clusterPressMaxZoom: 15,
      clusterStyle: styles.cluster,
      renderMarker: this.renderMarker,
    });
 
    return (
      <View style={styles.container}>
        <MapView
          provider={PROVIDER_GOOGLE}
          style={styles.map}
          region={region}
          onRegionChangeComplete={this.onRegionChangeComplete}
        >
          {clusters.map((cluster, index) => (
            <Marker
              key={index}
              coordinate={{
                latitude: cluster.latitude,
                longitude: cluster.longitude,
              }}
            >
              <Text>{cluster.count}</Text>
            </Marker>
          ))}
        </MapView>
        <ClusteredMap />
      </View>
    );
  }
}
 
const styles = StyleSheet.create({
  container: {
    ...StyleSheet.absoluteFillObject,
    justifyContent: 'flex-end',
    alignItems: 'center',
  },
  map: {
    ...StyleSheet.absoluteFillObject,
  },
  cluster: {
    backgroundColor: 'red',
    borderRadius: 100,
  },
});
 
export default MapClusteringExample;

这个代码示例展示了如何在React Native应用程序中使用React Native Map Clustering库来实现地图聚类功能。首先导入了必要的库，并定义了一个名为MapClusteringExample的组件。在组件的构造函数中，我们设置了地图的初始状态，包括地图的中心坐标、地标点、地图区域和缩放级别。onRegionChangeComplete方法用于在地图区域变化后更新组件状态。在render方法中，我们配置了聚类图层，并使