如何在react Native Map上显示方向

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

class MapScreen extends React.Component {
  render() {
    return (
      <View style={{ flex: 1 }}>
        <MapView
          style={{ flex: 1 }}
          initialRegion={{
            latitude: 37.78825,
            longitude: -122.4324,
            latitudeDelta: 0.0922,
            longitudeDelta: 0.0421,
          }}
        >
          {/* 在这里添加标记和方向 */}
        </MapView>
      </View>
    );
  }
}

class MapScreen extends React.Component {
  render() {
    return (
      <View style={{ flex: 1 }}>
        <MapView
          style={{ flex: 1 }}
          initialRegion={{
            latitude: 37.78825,
            longitude: -122.4324,
            latitudeDelta: 0.0922,
            longitudeDelta: 0.0421,
          }}
        >
          <Marker
            coordinate={{ latitude: 37.78825, longitude: -122.4324 }}
            title="Marker Title"
            description="Marker Description"
          />
          <MapView.Polyline
            coordinates={[
              { latitude: 37.78825, longitude: -122.4324 },
              { latitude: 37.78925, longitude: -122.4324 },
              { latitude: 37.78925, longitude: -122.4334 },
            ]}
            strokeWidth={2}
            strokeColor="red"
          />
        </MapView>
      </View>
    );
  }
}