react-native/Examples/UIExplorer/GeolocationExample.js

86 lines
2.1 KiB
JavaScript

/**
* The examples provided by Facebook are for non-commercial testing and
* evaluation purposes only.
*
* Facebook reserves all rights not expressly granted.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL
* FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* @flow
*/
/* eslint no-console: 0 */
'use strict';
var React = require('react-native');
var {
StyleSheet,
Text,
View,
} = React;
exports.framework = 'React';
exports.title = 'Geolocation';
exports.description = 'Examples of using the Geolocation API.';
exports.examples = [
{
title: 'navigator.geolocation',
render: function(): ReactElement {
return <GeolocationExample />;
},
}
];
var GeolocationExample = React.createClass({
watchID: (null: ?number),
getInitialState: function() {
return {
initialPosition: 'unknown',
lastPosition: 'unknown',
};
},
componentDidMount: function() {
navigator.geolocation.getCurrentPosition(
(initialPosition) => this.setState({initialPosition}),
(error) => console.error(error),
{enableHighAccuracy: true, timeout: 100, maximumAge: 1000}
);
this.watchID = navigator.geolocation.watchPosition((lastPosition) => {
this.setState({lastPosition});
});
},
componentWillUnmount: function() {
navigator.geolocation.clearWatch(this.watchID);
},
render: function() {
return (
<View>
<Text>
<Text style={styles.title}>Initial position: </Text>
{JSON.stringify(this.state.initialPosition)}
</Text>
<Text>
<Text style={styles.title}>Current position: </Text>
{JSON.stringify(this.state.lastPosition)}
</Text>
</View>
);
}
});
var styles = StyleSheet.create({
title: {
fontWeight: '500',
},
});