I have a MainPage where runs a MapView from 'react-native-maps'.
It works like a Uber app, the user receves a solicitation and the maps updates with the route. But after some time the map becomes extremelly slow in animations and i dont know why,
this is the code I'm using at the moment.
<MapView
ref={mapRef}
style={styles.mapView}
onMapReady={() => initInfo()}
moveOnMarkerPress={false}
showsTraffic={false}
showsIndoors={false}
showsUserLocation={true}
userLocationPriority="balanced"
followsUserLocation={true}
showsMyLocationButton={false}
showsCompass={false}
region={{
latitude: LocationRef.current.latitude,
longitude: LocationRef.current.longitude,
latitudeDelta: 0,
longitudeDelta: 0.02,
}}
customMapStyle={mapStyle}
>
{MarkersRef.current.length >= 1 ? (
MarkersRef.current.map((marker, index) => {
return (
<Marker
key={index}
coordinate={marker}
title={TitleMarkersRef.current[index]}
>
<Icons name='map-marker' color='#005042' size={25} />
</Marker>
)
})
)
:
null
}
{
(WaypointsToRouteRef.current.length > 2 ? (
<Polyline
coordinates={WaypointsToRouteRef.current}
strokeWidth={4}
strokeColor='#f2ae30' />
) : null)
}
</MapView>
<Map
ref={mapRef}
key={mapShouldUpdate}
showsUserLocation
userLocationAnnotationTitle={`Ma position`}
showsMyLocationButton
showsPointsOfInterest={false}
showsBuildings={false}
showsTraffic={false}
showsIndoors={false}
minZoomLevel={9}
maxZoomLevel={12}
rotateEnabled={false}
pitchEnabled={false}
toolbarEnabled={false}
loadingEnabled={usersLoading || offersLoading}
moveOnMarkerPress={false}
mapType={getMapType()}
initialRegion={{
latitude: mapCenter?.latitude,
longitude: mapCenter?.longitude,
latitudeDelta: 0.4,
longitudeDelta: 0.2,
}}
onRegionChangeComplete={(region) => {
setMapCenter(region)
onRegionChangeComplete?.(region)
}}
style={{ ...eva.style.Map, ...style }}
>
I tried changing the minZoomLevel, maxZoomLevel, latitudeDelta, longitudeDelta but it doesn't render what I want. I would like the user zoom to be limited.
Any solution?
Could you try:
minDelta={0.05}
maxDelta={2}
it should work!
I'm trying to add markers to my map. I want to have all the location data on a separate file so I'm trying to extract the coordinates from my data.json file. The latlng coordinates are in an array in the json file. Am I using the position attribute incorrectly?
render() {
return (
<View style={styles.container}>
<DestinationButton />
<CurrentLocationButton
cb={() => {
this.centerMap();
}}
/>
<MapView
initialRegion={this.state.region}
showsUserLocation={true}
showsCompass={true}
rotateEnabled={false}
ref={(map) => {
this.map = map;
}}
style={{ flex: 1, zIndex: 0 }}
>
{data.features.map((tc) => (
<Marker
key={tc.properties.NAME}
position={{
lat: tc.geometry.coordinates[1],
lng: tc.geometry.coordinates[0],
}}
/>
))}
</MapView>
</View>
);
}
Seems like you are giving a wrong prop to <Marker/> it should be coordinate instead of position. As per docs: https://github.com/react-native-maps/react-native-maps#rendering-a-list-of-markers-on-a-map
<Marker
key={tc.properties.NAME}
coordinate={{
latitude: tc.geometry.coordinates[1],
longitude: tc.geometry.coordinates[0],
}}
/>
I've spent about 5 hours trying to get this to work with many different permutations of code, and then rebuilding. I cannot for the life of me change the default "red pointer" marker as the default marker image in react native maps.
import MapView, { PROVIDER_GOOGLE } from 'react-native-maps';
...
<MapView
provider={PROVIDER_GOOGLE}
style={styles.map}
ref={ref => {this.map = ref;}}
minZoomLevel={4} // default => 0
maxZoomLevel={10} // default => 20
enableZoomControl={true}
showsUserLocation = {true}
showsMyLocationButton = {true}
zoomEnabled = {true}
initialRegion={{
latitude: 37.600425,
longitude: -122.385861,
latitudeDelta: LATITUDE_DELTA,
longitudeDelta: LONGITUDE_DELTA,
}}
>
<MapView.Marker
coordinate={marker.location}
image={require('./images/test.png')} <------ HERE
width={48}
height={48}
/>
</MapView>
The images definitely exist in the right folder, I've tried different image formats png/gif/jpg/svg, I've tried using {{uri:...}} and icon/image, adding and removing width/height attributes. Nothing seems to work. I'm always getting the default red pointer.
Have I missed something obvious?
The project packager/compiler fails when I require an image that doesn't exist, or an unsupported type. It definitely can see the image, but just doesn't do anything with it. Same results on the emulator and on actual device.
image={require('./images/test.png')}
This line just does nothing, as if it's being ignored somehow.
<MapView
provider={PROVIDER_GOOGLE}
style={styles.container}
region={{
latitude: this.state.latitude,
longitude: this.state.longitude,
}}
>
<Marker
coordinate={{
latitude: this.state.latitude,
longitude: this.state.longitude,
}}
description={"This is a marker in React Natve"}
>
<Image source={require('./man_marker.png')} style={{height: 35, width:35 }} />
</Marker>
</MapView>
There are two solutions:
The first solution (recommended)
Resize your marker image with image editor(such as Photoshop,....) and use as icon in marker
To do this, you can make three photos of different sizes (YOUR_MARKER.png , YOUR_MARKER#2x.png , YOUR_MARKER#3x.png) (React Native automatically displays the appropriate item).
This is a good solution if you have a large number of markers.(You can refer here to clarify this)
<Marker
coordinate={ ... }
tracksViewChanges={false}
icon={require('./YOUR_MARKER.png')}
/>
The second solution
As #shubham-raitka said you can use the Image inside the marker
<Marker
coordinate={ ... }
>
<Image source={require('./YOUR_MARKER.png')} style={{height: 35, width:35 }} />
</Marker>
In this case, if your number of markers is high (about 50 or more) the map performance will be very low.Therefore, it is not recommended to use this method
Here's an approach that worked for me in a similar situation: Use Image in place of Marker. Pop-ups work the same as with a marker. If you try this, Image is imported from react-native. The actual image is imported as:
var dotImage = require('./pathToImage.png')
<Marker
coordinate={meter.latlng}
title={"Parking Meter"}
key={idx}
>
<Image
source={dotImage}
style={{height: 6, width: 6}}
/>
</Marker>
The way you give the width and height is a bit strange, please try with this way.
import MapView, { Marker, PROVIDER_GOOGLE } from 'react-native-maps';
const markerImg = require('./images/test.png'); // <-- create a const with the path of the image
<------
------>
<MapView
provider={PROVIDER_GOOGLE}
style={styles.map}
ref={ref => {this.map = ref;}}
minZoomLevel={4} // default => 0
maxZoomLevel={10} // default => 20
enableZoomControl={true}
showsUserLocation = {true}
showsMyLocationButton = {true}
zoomEnabled = {true}
initialRegion={{
latitude: 37.600425,
longitude: -122.385861,
latitudeDelta: LATITUDE_DELTA,
longitudeDelta: LONGITUDE_DELTA,
}}
>
<Marker
image={markerImg} // <----- add this the const with image
onPress={() => this.setState({ marker1: !this.state.marker1 })}
coordinate={{
latitude: 37.600425,
longitude: -122.385861,
}}
centerOffset={{ x: -18, y: -60 }}
anchor={{ x: 0.69, y: 1 }}
/>
</Marker>
</MapView>
I hope it works for you, works for me!
Not enough rep yet to just leave a comment, but the first solution works, I just had to add resizeMode or it cuts off the image if it's bigger.
<Marker
coordinate={ ... }
>
<Image source={require('./YOUR_MARKER.png')} style={{height: 35, width:35, resizeMode:"contain" }} />
</Marker>
<Marker
coordinate={d.driverLocation}
title={d.driverName}
description={d.autoNumber}
onPress={() => console.warn(d.mobaNumbers)}
image={require("../../../assets/bee.png")}
>
</Marker>
Try this it should work
import {Image} from 'react-native';
import MapView, {Marker} from 'react-native-maps';
<MapView
style={styles.mapStyle}
initialRegion={{
latitude: 37.78825,
longitude: -122.4324,
latitudeDelta: 0.0922,
longitudeDelta: 0.0421,
}}
customMapStyle={mapStyle}>
<Marker
draggable
coordinate={{
latitude: 37.78825,
longitude: -122.4324,
}}
onDragEnd={e => alert(JSON.stringify(e.nativeEvent.coordinate))}
title={'Test Marker'}
description={'This is a description of the marker'}>
<Image
source={require('./assests/custom_marker.png')}
style={{height: 35, width: 35}}
/>
</Marker>
</MapView>
I want to integrate maps in my react-native app, I am using the “react-native-maps” library for that
https://github.com/airbnb/react-native-maps
I want to use clustering but I am unable to find proper documentations related to that.
Please help me to find documentation of how to integrate maps with clustering and also tell which library is best for the implementation of clustering for both platforms, iOS and Android.
You can use mapbox/supercluster repo, and here's a gist showing how to implements supercluster to React Native. It's initially developed for browser/node applications but you can still simply npm install and use it (javascript is javascript everywhere). Add the clustered markers into your MapView (originally shared here):
<MapView ref={ref => { this.map = ref; }}>
{ this.state.markers.map((marker, index) => {
return (
<MapView.Marker
coordinate={{ latitude: marker.geometry.coordinates[1], longitude: marker.geometry.coordinates[0] }}
onPress={() => this.markerPressed(marker)}>
<Marker model={place} active={this.isSelected(place)} />
</MapView.Marker>
);
})}
</MapView>
Warning from an issue of react-native-maps:
The major issue is performance, if you need to display hundreds or
thousands of markers you're gonna have to optimize the hell out of it,
and this is where it gets really hard.
react-native-maps also have an active conflicting PR which solves this issue both in Android and iOS natively, but it waits for a merge. However, you can manually implement it.
You can use react-native-maps-super-cluster. This module wraps AirBnB's react-native-maps and uses MapBox's SuperCluster as clustering engine. This module is super easy to use.
Demo
There is one more library for clustering react-native-map-clustering.
yarn add react-native-map-clustering
import {Marker} from 'react-native-maps';
import MapView from "react-native-map-clustering";
const INITIAL_REGION = {
latitude: 52.5,
longitude: 19.2,
latitudeDelta: 8.5,
longitudeDelta: 8.5,
};
const App = () => (
<MapView initialRegion={INITIAL_REGION} style={{ flex: 1 }}>
<Marker coordinate={{ latitude: 52.4, longitude: 18.7 }} />
<Marker coordinate={{ latitude: 52.1, longitude: 18.4 }} />
<Marker coordinate={{ latitude: 52.6, longitude: 18.3 }} />
<Marker coordinate={{ latitude: 51.6, longitude: 18.0 }} />
<Marker coordinate={{ latitude: 53.1, longitude: 18.8 }} />
<Marker coordinate={{ latitude: 52.9, longitude: 19.4 }} />
<Marker coordinate={{ latitude: 52.2, longitude: 21 }} />
<Marker coordinate={{ latitude: 52.4, longitude: 21 }} />
<Marker coordinate={{ latitude: 51.8, longitude: 20 }} />
</MapView>
);
How does this work with callouts?
Using this code gives me an error: Element type is invalid: expected a string...
<Marker>
<MapView.Callout tooltip>
<Text>Test Text</Text>
</MapView.Callout>
</Marker>