78 lines
1.8 KiB
JavaScript
78 lines
1.8 KiB
JavaScript
/**
|
|
* Copyright (c) 2015-present, Facebook, Inc.
|
|
*
|
|
* This source code is licensed under the MIT license found in the
|
|
* LICENSE file in the root directory of this source tree.
|
|
*
|
|
* @format
|
|
* @flow
|
|
*/
|
|
|
|
'use strict';
|
|
|
|
var React = require('react');
|
|
var ReactNative = require('react-native');
|
|
var {StyleSheet, Text, View} = ReactNative;
|
|
|
|
exports.framework = 'React';
|
|
exports.title = 'Geolocation';
|
|
exports.description = 'Examples of using the Geolocation API.';
|
|
|
|
exports.examples = [
|
|
{
|
|
title: 'navigator.geolocation',
|
|
render: function(): React.Element<any> {
|
|
return <GeolocationExample />;
|
|
},
|
|
},
|
|
];
|
|
|
|
class GeolocationExample extends React.Component<{}, $FlowFixMeState> {
|
|
state = {
|
|
initialPosition: 'unknown',
|
|
lastPosition: 'unknown',
|
|
};
|
|
|
|
watchID: ?number = null;
|
|
|
|
componentDidMount() {
|
|
navigator.geolocation.getCurrentPosition(
|
|
position => {
|
|
var initialPosition = JSON.stringify(position);
|
|
this.setState({initialPosition});
|
|
},
|
|
error => alert(JSON.stringify(error)),
|
|
{enableHighAccuracy: true, timeout: 20000, maximumAge: 1000},
|
|
);
|
|
this.watchID = navigator.geolocation.watchPosition(position => {
|
|
var lastPosition = JSON.stringify(position);
|
|
this.setState({lastPosition});
|
|
});
|
|
}
|
|
|
|
componentWillUnmount() {
|
|
this.watchID != null && navigator.geolocation.clearWatch(this.watchID);
|
|
}
|
|
|
|
render() {
|
|
return (
|
|
<View>
|
|
<Text>
|
|
<Text style={styles.title}>Initial position: </Text>
|
|
{this.state.initialPosition}
|
|
</Text>
|
|
<Text>
|
|
<Text style={styles.title}>Current position: </Text>
|
|
{this.state.lastPosition}
|
|
</Text>
|
|
</View>
|
|
);
|
|
}
|
|
}
|
|
|
|
var styles = StyleSheet.create({
|
|
title: {
|
|
fontWeight: '500',
|
|
},
|
|
});
|