react-native-maps fitToSuppliedMarker/fitToCorodinates 不显示所有标记

Question

我正在尝试使用简单的 MapView 并显示 2 个标记。

它们都在地图视图上正确显示，但在屏幕上不可见（默认渲染 Image1）

在屏幕上可以看到两个标记之前，我必须执行手动拖动操作。（我手动拖动地图后的图像2，以便它们可以在屏幕上看到）

我尝试使用 fitToSuppliedMarkers/fitToCocordinates 但似乎没有任何效果。

export default class FavItemMapView extends Component{

constructor(props){
    super(props)
    this.state={
        position:{
            latitude:1.286353,
            longitude:103.853067,
            latitudeDelta: 0,
            longitudeDelta: 0,
        },
        error:null
    }
    this.mapRef = null;
}

componentWillMount(){

    const favPlaceLatitude = parseFloat(this.props.navigation.state.params.latitude)
    const favPlaceLongitude = parseFloat(this.props.navigation.state.params.longitude)
    markers.push({latitude:favPlaceLatitude,longitude:favPlaceLongitude});
    navigator.geolocation.getCurrentPosition(
        (position) => {
          console.log("wokeeey" + width + height);
          console.log(position);
          var lat = parseFloat(position.coords.latitude)
          var long = parseFloat(position.coords.longitude)

          var initialRegion = {
            latitude: lat,
            longitude: long,
            latitudeDelta: LATITUDE_DELTA,
            longitudeDelta: LONGITUDE_DELTA,
          }

          this.onRegionChange(initialRegion)
        },
        (error) => this.setState({ error: error.message }),
        { enableHighAccuracy: false, timeout: 200000, maximumAge: 1000 },
      );
}

onRegionChange(region) {
    this.setState({ position:region })
}

componentDidMount(){
    //this.mapRef.fitToSuppliedMarkers(markerIDs,true);
    const favPlaceLatitude = parseFloat(this.props.navigation.state.params.latitude)
    const favPlaceLongitude = parseFloat(this.props.navigation.state.params.longitude)
    this.mapRef.fitToCoordinates([{latitude:favPlaceLatitude,longitude:favPlaceLongitude}], {
        edgePadding: {
          bottom: 200, right: 50, top: 150, left: 50,
        },
        animated: true,
    });
}

render(){

    const { navigation } = this.props;
    const favPlaceLatitude = parseFloat(navigation.state.params.latitude)
    const favPlaceLongitude = parseFloat(navigation.state.params.longitude)

    return(
        <View style={styles.container}>
            <MapView provider={MapView.PROVIDER_GOOGLE} ref={ref => {this.mapRef = ref;}} style={styles.map} region={this.state.position}>
                {this.state.position.latitude &&
                    <MapView.Marker identifier="Marker2" coordinate={{latitude:this.state.position.latitude,longitude:this.state.position.longitude}} pinColor="red"/>
                }
                {this.state.position.longitude &&
                    <MapView.Marker identifier="Marker1" coordinate={{latitude:favPlaceLatitude,longitude:favPlaceLongitude}} pinColor="green"/>
                }
            </MapView>
        </View>
    );
  }
}

const styles={
  container:{
    ...StyleSheet.absoluteFillObject,
    justifyContent: 'flex-end',
    alignItems: 'center',
  },
  map:{
    padding:100,
    ...StyleSheet.absoluteFillObject
  }
}

你能建议什么是错的吗？附上模拟器图像以供参考。

Answer 1

<MapView
    provider={MapView.PROVIDER_GOOGLE}
    ref={map => {this.map = map}}
    style={{ flex: 1 }}
    initialRegion={{latitude:this.state.request.latitude,
      longitude:this.state.request.longitude,
      latitudeDelta: 0.0922,
      longitudeDelta: 0.0421,}}
    onMapReady={() => {this.map.fitToSuppliedMarkers(['mk1','mk2'],{ edgePadding: 
      {top: 50,
        right: 50,
        bottom: 50,
        left: 50}

    })}}
    >
    <Marker
    image={require('../../../assets/pin.png')}
    coordinate={{latitude:this.state.request.latitude,longitude:this.state.request.longitude}} 
    title='Punto de partida'
    identifier={'mk1'}
    >

    </Marker>

    <Marker
    image={require('../../../assets/pin_final.png')}
    coordinate={{latitude:this.state.request.latitude_destinity,longitude:this.state.request.longitude_destinity}} 
    title='Punto de destino'
    identifier={'mk2'}
>