React Native Mapview component for iOS + Android for expo build
npm install react-native-maps-expoReact Native Map components for iOS + Android
This project is being maintained by a small group of people, and any help with issues and pull requests are always appreciated. If you are able and willing to contribute, please read the guidelines.
See Installation Instructions.
See Setup Instructions for the Included Example Project.
react-native-maps requires react-native >= 0.64.3.
``js`
import MapView from 'react-native-maps';
or
`js`
var MapView = require('react-native-maps');
This MapView component is built so that features on the map (such as Markers, Polygons, etc.) are
specified as children of the MapView itself. This provides an intuitive and react-like API for
declaratively controlling features on the map.
`jsx`
latitude: 37.78825,
longitude: -122.4324,
latitudeDelta: 0.0922,
longitudeDelta: 0.0421,
}}
/>
`jsx
getInitialState() {
return {
region: {
latitude: 37.78825,
longitude: -122.4324,
latitudeDelta: 0.0922,
longitudeDelta: 0.0421,
},
};
}
onRegionChange(region) {
this.setState({ region });
}
render() {
return (
onRegionChange={this.onRegionChange}
/>
);
}
`
`jsx
import {Marker} from 'react-native-maps';
{this.state.markers.map((marker, index) => (
coordinate={marker.latlng}
title={marker.title}
description={marker.description}
/>
))}
`
1. You need to generate an png image with various resolution (lets call them custom_pin) - for more information go to Android, iOS
2. put all images in Android drawables and iOS assets dir
3. Now you can use the following code:
`jsx`
image={{uri: 'custom_pin'}}
/>
Note: You can also pass the image binary data like image={require('custom_pin.png')}, but this will not scale good with the different screen sizes.
Note: This has performance implications, if you wish for a simpler solution go with a custom image (save your self the head ache)
`jsx`
`jsx
import {Callout} from 'react-native-maps';
`
`jsx`
onDragEnd={(e) => this.setState({ x: e.nativeEvent.coordinate })}
/>
#### Tile Overlay using tile server
`jsx
import {UrlTile} from 'react-native-maps';
* The url template of the tile server. The patterns {x} {y} {z} will be replaced at runtime
* For example, http://c.tile.openstreetmap.org/{z}/{x}/{y}.png
*/
urlTemplate={this.state.urlTemplate}
/**
* The maximum zoom level for this tile overlay. Corresponds to the maximumZ setting in
* MKTileOverlay. iOS only.
*/
maximumZ={19}
/**
* flipY allows tiles with inverted y coordinates (origin at bottom left of map)
* to be used. Its default value is false.
*/
flipY={false}
/>
`
For Android: add the following line in your AndroidManifest.xml
`xml`
For IOS: configure App Transport Security in your app
#### Tile Overlay using local tiles
Tiles can be stored locally within device using xyz tiling scheme and displayed as tile overlay as well. This is usefull especially for offline map usage when tiles are available for selected map region within device storage.
`jsx
import {LocalTile} from 'react-native-maps';
* The path template of the locally stored tiles. The patterns {x} {y} {z} will be replaced at runtime
* For example, /storage/emulated/0/mytiles/{z}/{x}/{y}.png
*/
pathTemplate={this.state.pathTemplate}
/**
* The size of provided local tiles (usually 256 or 512).
*/
tileSize={256}
/>
`
For Android: LocalTile is still just overlay over original map tiles. It means that if device is online, underlying tiles will be still downloaded. If original tiles download/display is not desirable set mapType to 'none'. For example:
`
>
See OSM Wiki for how to download tiles for offline usage.
Place components that you wish to overlay MapView underneath the MapView closing tag. Absolutely position these elements.
`jsx`
render() {
return (
/>
/>
);
}
Create the json object, or download a generated one from the google style generator.
`jsx
// The generated json object
mapStyle = [ ... ]
render() {
return (
onRegionChange={this.onRegionChange}
customMapStyle={mapStyle}
/>
);
}
`
For iOS, in addition to providing the mapStyle you will need to do the following
`jsx
import MapView, { PROVIDER_GOOGLE } from 'react-native-maps'
// ...
customMapStyle={MapStyle}
>
`
Then add the AirGoogleMaps directory:
https://github.com/react-native-maps/react-native-maps/blob/1e71a21f39e7b88554852951f773c731c94680c9/docs/installation.md#ios
An unofficial step-by-step guide is also available at https://gist.github.com/heron2014/e60fa003e9b117ce80d56bb1d5bfe9e0
The component and its child components have several events that you can subscribe to.
This example displays some of them in a log as a demonstration.
 
 
One can change the mapview's position using refs and component methods, or by passing in an updated
region prop. The component methods will allow one to animate to a given position like the native
API could.
 
 
The component can be made to work with the Animated API, having the entire region prop
be declared as an animated value. This allows one to animate the zoom and position of the MapView along
with other gestures, giving a nice feel.
Further, Marker views can use the animated API to enhance the effect.
 
Issue: Since android needs to render its marker views as a bitmap, the animations APIs may not be
compatible with the Marker views. Not sure if this can be worked around yet or not.
Markers' coordinates can also be animated, as shown in this example:
 
 
So far, , , and are available to pass in as children to the component.
 
Gradient polylines can be created using the strokeColors prop of the component.
Default markers will be rendered unless a custom marker is specified. One can optionally adjust the
color of the default marker by using the pinColor prop.
 
Callouts to markers can be completely arbitrary react views, similar to markers. As a result, they
can be interacted with like any other view.
Additionally, you can fall back to the standard behavior of just having a title/description through
the 's title and description props.
Custom callout views can be the entire tooltip bubble, or just the content inside of the system
default bubble.
To handle press on specific subview of callout use with onPress.Callouts.js
See example.
 
Markers can be customized by just using images, and specified using the image prop.
Markers are draggable, and emit continuous drag events to update other UI during drags.
 
Enable lite mode on Android with liteMode prop. Ideal when having multiple maps in a View or ScrollView.
Poi are clickable, you can catch the event to get its information (usually to get the full detail from Google Place using the placeId).
The MapView can accept an AnimatedRegion value as its region prop. This allows you to utilize the Animated API to control the map's center and zoom.
`jsx
import MapView, { AnimatedRegion, Animated } from 'react-native-maps';
getInitialState() {
return {
region: new AnimatedRegion({
latitude: LATITUDE,
longitude: LONGITUDE,
latitudeDelta: LATITUDE_DELTA,
longitudeDelta: LONGITUDE_DELTA,
}),
};
}
onRegionChange(region) {
this.state.region.setValue(region);
}
render() {
return (
onRegionChange={this.onRegionChange}
/>
);
}
`
Markers can also accept an AnimatedRegion value as a coordinate.
`jsx
import Mapview, { AnimatedRegion, MarkerAnimated } from 'react-native-maps';
getInitialState() {
return {
coordinate: new AnimatedRegion({
latitude: LATITUDE,
longitude: LONGITUDE,
}),
};
}
componentWillReceiveProps(nextProps) {
const duration = 500
if (this.props.coordinate !== nextProps.coordinate) {
if (Platform.OS === 'android') {
if (this.marker) {
this.marker.animateMarkerToCoordinate(
nextProps.coordinate,
duration
);
}
} else {
this.state.coordinate.timing({
...nextProps.coordinate,
useNativeDriver: true, // defaults to false if not passed explicitly
duration
}).start();
}
}
}
render() {
return (
coordinate={this.state.coordinate}
/>
);
}
`
`jsx
import MapView, { Marker } from 'react-native-maps';
getInitialState() {
return {
coordinate: {
latitude: LATITUDE,
longitude: LONGITUDE,
},
};
}
takeSnapshot () {
// 'takeSnapshot' takes a config object with the
// following options
const snapshot = this.map.takeSnapshot({
width: 300, // optional, when omitted the view-width is used
height: 300, // optional, when omitted the view-height is used
region: {..}, // iOS only, optional region to render
format: 'png', // image formats: 'png', 'jpg' (default: 'png')
quality: 0.8, // image quality: 0..1 (only relevant for jpg, default: 1)
result: 'file' // result types: 'file', 'base64' (default: 'file')
});
snapshot.then((uri) => {
this.setState({ mapSnapshot: uri });
});
}
render() {
return (
Take Snapshot
);
}
`
Pass an array of marker identifiers to have the map re-focus.
 
Pass an array of coordinates to focus a map region on said coordinates.
#### My map is blank
- Make sure that you have properly installed react-native-maps.
- Check in the logs if there is more informations about the issue.
- Try setting the style of the MapView to an absolute position with top, left, right and bottom values set.
- Make sure you have enabled Google Maps API in Google developer console
`javascript`
const styles = StyleSheet.create({
map: {
...StyleSheet.absoluteFillObject,
},
});
`jsx`
// other props
/>
#### Inputs don't focus
- When inputs don't focus or elements don't respond to tap, look at the order of the view hierarchy, sometimes the issue could be due to ordering of rendered components, prefer putting MapView as the first component.
Bad:
`jsx`
Good:
`jsx`
#### Children Components Not Re-Rendering
Components that aren't declared by this library (Ex: Markers, Polyline) must not be children of the MapView component due to MapView's unique rendering methodology. Have your custom components / views outside the MapView component and position absolute to ensure they only re-render as needed.
Example:
Bad:
`jsx`
Good:
`jsx`
Source: https://github.com/react-native-maps/react-native-maps/issues/1901
#### Crashing with EXC_BAD_ACCESS on iOS when switching apps
using Apple Maps in mapType: "standard" will sometimes crash when you background the app or switch into another app. This is only an issue in XCode using Metal API Validation, and won't happen in production. To eliminate this problem even while debugging in XCode, go to Edit Scheme... -> Run (Debug) -> Diagnostics and uncheck Metal -> API Validation. (h/t @Simon-TechForm).
Source: https://github.com/react-native-maps/react-native-maps/issues/3957#issuecomment-924161121
#### onRegionChangeComplete() callback is called infinitely
If changing the state in onRegionChangeComplete is called infinitely, add a condition to limit these calls to occur only when the region change was done as a result of a user's action.
`javascript
onRegionChangeComplete={ (region, gesture) => {
// This fix only works on Google Maps because isGesture is NOT available on Apple Maps
if (!gesture.isGesture) {
return;
}
// You can use
dispatch({ type: "map_region", payload: { mapRegion: region }}); // if using useReducer
// setMapRegionState(region); // if using useState
}}
``
Source: https://github.com/react-native-maps/react-native-maps/issues/846#issuecomment-1210079461
Copyright (c) 2017 Airbnb
Licensed under the The MIT License (MIT) (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
https://raw.githubusercontent.com/airbnb/react-native-maps/master/LICENSE
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.