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