在react native中状态更改时更新地图标记

import React, { useState } from 'react';
import { View, StyleSheet } from 'react-native';
import MapView, { Marker } from 'react-native-maps';

const MyMapComponent = () => {
  const [markerPosition, setMarkerPosition] = useState({ latitude: 37.78825, longitude: -122.4324 });

  const handleMarkerPress = () => {
    // 更新地图标记的位置
    setMarkerPosition({ latitude: 37.7749, longitude: -122.4194 });
  };

  return (
    <View style={styles.container}>
      <MapView style={styles.map} initialRegion={{ latitude: 37.78825, longitude: -122.4324, latitudeDelta: 0.0922, longitudeDelta: 0.0421 }}>
        <Marker coordinate={markerPosition} onPress={handleMarkerPress} />
      </MapView>
    </View>
  );
};

const styles = StyleSheet.create({
  container: {
    flex: 1,
  },
  map: {
    flex: 1,
  },
});

export default MyMapComponent;

import React from 'react';
import { View } from 'react-native';
import MyMapComponent from './MyMapComponent';

const App = () => {
  return (
    <View style={{ flex: 1 }}>
      {/* 其他组件 */}
      <MyMapComponent />
      {/* 其他组件 */}
    </View>
  );
};

export default App;