7

我是本机反应的新手，找不到任何有关如何使用 mapbox 以编程方式向地图添加标记/注释的文档。

我们正在使用 geofire 查询，当兴趣点在范围内时触发。

在触发器内我想插入标记。

我找到的关于它的所有文档都是这样的：https ://www.mapbox.com/help/first-steps-react-native-sdk/ 它在初始化和渲染期间添加了标记。

到目前为止，这是我的代码

    render () {
        const {navigate} = this.props.navigation;
        return (
          <View style ={{flex: 1, position: 'relative'}}>
            <Mapbox.MapView
                styleURL={Mapbox.StyleURL.Dark}
                zoomLevel={15}
                centerCoordinate={[11.256, 43.770]}
                ref={map => { this.map = map; }}
                style={{flex: 1}}>
                {this.renderAnnotations([11.256, 43.770])}
            </Mapbox.MapView>


            <View style={styles.menuMainContainer}>

                {this.state.menuStatus ? <Animatable.View style={styles.menuSubcontainer}  animation={"bounceIn"}>
                    <View style={{justifyContent: 'space-between', justifyContent: 'center', flex: 1, marginBottom: 50}}>
                      <View style={{flexDirection: 'row', justifyContent: 'space-around'}}>
                        <MenuOptions imageSource={Images.lightIcon} menuTag="trash" name="Basureros"/>
                        <MenuOptions imageSource={Images.lightIcon} menuTag="holes" name="Huecos"/>
                      </View>
                      <View style={{flexDirection: 'row', justifyContent: 'space-around'}}>
                        <MenuOptions imageSource={Images.lightIcon} menuTag="hydrants" name="Hidrantes"/>
                        <MenuOptions imageSource={Images.lightIcon} menuTag="parking" name="Estacionamiento"/>
                      </View>
                      <View style={{flexDirection: 'row', justifyContent: 'space-around'}}>
                        <MenuOptions imageSource={Images.lightIcon} menuTag="others" name="Otros"/>
                      </View>
                    </View>
                  </Animatable.View> : null
                }
            </View>

            <View style ={styles.bottomContainer}>

              <TouchableOpacity  style={styles.buttons}>
                <Text style={styles.buttonText}>Boton_1</Text>
              </TouchableOpacity>
              <TouchableOpacity onPress ={this._takePhotofromCamera} style={styles.buttons}>
                <Text style={styles.buttonText}>Agregar Reportes</Text>
              </TouchableOpacity>
              <TouchableOpacity style={styles.buttons} onPress = {() => this.toggleMenuStatus()}>
                <Text style={styles.buttonText}>Boton_3</Text>
              </TouchableOpacity>
            </View>

      </View>

        )
      }
    }


    renderAnnotations = (location) =>{
        console.log('entro renderan2')
        return(
          <Mapbox.PointAnnotation
            key='pointAnnotation'
            id='pointAnnotation'
            coordinate={location}>

            <View style={styles.annotationContainer}>
              <View style={styles.annotationFill} />
            </View>
            <Mapbox.Callout title='Look! An annotation!' />
          </Mapbox.PointAnnotation>


      )
      }

    this.state.geoQuery.on("key_entered", function(key, location, distance) {
           console.log(key + " is located at [" + location + "] which is within the query (" + distance.toFixed(2) + " km from center)");
this.renderAnnotations();
})

我得到：错误：this.renderAnnotations 不是函数

我还尝试在 this.state.geoQuery 中复制整个函数，没有错误，但标记也没有显示。

this.state.geoQuery.on("key_entered", function(key, location, distance) {
       console.log(key + " is located at [" + location + "] which is within the query (" + distance.toFixed(2) + " km from center)");
       return(
         <Mapbox.PointAnnotation
           key='pointAnnotation'
           id='pointAnnotation'
           coordinate={location}>

           <View style={styles.annotationContainer}>
             <View style={styles.annotationFill} />
           </View>
           <Mapbox.Callout title='Look! An annotation!' />
         </Mapbox.PointAnnotation>
     )});

谢谢

4

3 回答 3

7

在直接与 Mapbox 支持聊天后，他们告诉我 PointAnnotation 是遗留的，应该使用 ShapeSource 和 SymbolLayer，它有更好的性能。这是如何做到的：

    <Mapbox.MapView
                key='mainmap'
                textureMode={true}
                pitch={60}
                ref={(c) => this._map = c}
                onPress={this.onPress}
                styleURL={Mapbox.StyleURL.Light}
                zoomLevel={17}
                maxZoomLevel={20}
                minZoomLevel={15}
                centerCoordinate={this.initCenterLocation()}
                style={{ flex: 1 }}
                showUserLocation={true}
                userTrackingMode={Mapbox.UserTrackingModes.FollowWithHeading}
            >
                <Mapbox.ShapeSource
                    id='exampleShapeSource'
                    shape={this.state.featureCollection}
                    onPress={(feature) => this.onShapeSourceLayer(feature)}
                    images={{ assets: ['pin', 'm1_marker', 'm2_marker', 'm3_marker', 'm4_marker'] }}>
                    <Mapbox.SymbolLayer id='exampleIconName' minZoomLevel={1} style={stylesIcon.icon} />
                </Mapbox.ShapeSource>
            </Mapbox.MapView>

插入新的注释/点：

    this.setState({
            featureCollection: Mapbox.geoUtils.addToFeatureCollection(
                this.state.featureCollection,
                Mapbox.geoUtils.makeFeature({ type: 'Point', coordinates: location }, { icon: iconImage, key: key }),
            ),
        });

在注释按下功能：

onShapeSourceLayer(e) {

    const feature = e.nativeEvent.payload;

    this.setState({
        annotationKey: feature.properties.key
    }, function () {

        this.togglePostModal(true)
    });

}
于 2018-01-23T00:10:42.503 回答
3

简单的 ：

constructor() {
   this.state = {
      myMarker: [0, 0]//intial 0
   };
}

<Mapbox.MapView key='mainmap'> 
    <Mapbox.PointAnnotation
       key="key1"
       id="id1"
       title="Test"
       coordinate={this.state.myMarker}>
    </Mapbox.PointAnnotation>
</Mapbox.MapVie>


update latitude and longitude : 
   updateMyMarker(data){
   this.setState({myMarker: [data.Lng, data.Lat]})
}
于 2019-03-09T10:07:15.417 回答
0

我使用 react-native-maps 所以我不知道确切的内容，但是您要问的正是文档中的内容：https ://www.mapbox.com/help/first-steps-react-native-sdk/#add -an-annotation

编辑：你的错误来了，对吧？

 this.state.geoQuery.on("key_entered", function(key, location, distance) {
           console.log(key + " is located at [" + location + "] which is within the query (" + distance.toFixed(2) + " km from center)");
this.renderAnnotations();
})

如果是这样，问题可能是“this”在触发时超出了您的功能范围。

试试这个：

 this.state.geoQuery.on("key_entered", (key, location, distance) => {
           console.log(key + " is located at [" + location + "] which is within the query (" + distance.toFixed(2) + " km from center)");
this.renderAnnotations();
})
于 2018-01-21T19:16:43.187 回答