问题描述
我是本机的新手，无法找到有关如何使用mapbox以编程方式向地图添加标记/注释的任何文档.
I'm new to react native and cannot find any documentation on how to add markers / annotations programatically to the map using mapbox.
我们正在使用geofire查询，该查询会在兴趣点处于范围内时触发.
We are using geofire query, which triggers when a point of interest is withing range.
我要在触发器内插入标记.
Inside the trigger I want to insert the marker.
我找到的所有文档都是这样的: https://www.mapbox.com/help/first-steps-react-native-sdk/，它会在初始化和渲染过程中添加标记.
All the documentation I found about it is this: https://www.mapbox.com/help/first-steps-react-native-sdk/ which adds the marker during initialization and render.
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，但是标记也没有显示.
I also tried copying the entire function inside this.state.geoQuery, no error, but markers are not showing either.
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
推荐答案
直接与Mapbox支持聊天之后，他们告诉我PointAnnotation是旧版，应该改用ShapeSource和SymbolLayer，它具有很多更好的性能.这是操作方法:
After chatting directly with Mapbox support, they told me PointAnnotation is legacy and should use ShapeSource and SymbolLayer instead, it have a LOT better performance. Here is how to do it:
<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 }),
),
});
在注释上按功能:
onShapeSourceLayer(e) {
const feature = e.nativeEvent.payload;
this.setState({
annotationKey: feature.properties.key
}, function () {
this.togglePostModal(true)
});
}
这篇关于如何使用Mapbox以编程方式添加标记/注释并进行本机反应的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！