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<!DOCTYPE html><html><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><title>React Native | A framework for building native apps using React</title><meta name="viewport" content="width=device-width"><meta property="og:title" content="React Native | A framework for building native apps using React"><meta property="og:type" content="website"><meta property="og:url" content="http://facebook.github.io/react-native/index.html"><meta property="og:image" content="http://facebook.github.io/react-native/img/opengraph.png?2"><meta property="og:description" content="A framework for building native apps using React"><link rel="shortcut icon" href="/react-native/img/favicon.png?2"><link rel="stylesheet" href="/react-native/css/react-native.css"><script type="text/javascript" src="//use.typekit.net/vqa1hcx.js"></script><script type="text/javascript">try{Typekit.load();}catch(e){}</script></head><body><div class="container"><div class="nav-main"><div class="wrap"><a class="nav-home" href="/react-native/"><img src="/react-native/img/header_logo.png">React Native</a><div class="nav-site-wrapper"><ul class="nav-site nav-site-internal"><li><a href="/react-native/docs/getting-started.html" class="active">Docs</a></li><li><a href="/react-native/support.html" class="">Support</a></li></ul><ul class="nav-site nav-site-external"><li><a href="http://github.com/facebook/react-native" class="">GitHub</a></li><li><a href="http://facebook.github.io/react" class="">React</a></li></ul></div></div></div><section class="content wrap documentationContent"><div class="nav-docs"><div class="nav-docs-section"><h3>Quick Start</h3><ul><li><a style="margin-left:0;" class="" href="/react-native/docs/getting-started.html#content">Getting Started</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/tutorial.html#content">Tutorial</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/videos.html#content">Videos</a></li></ul></div><div class="nav-docs-section"><h3>Guides</h3><ul><li><a style="margin-left:0;" class="" href="/react-native/docs/style.html#content">Style</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/gesture-responder-system.html#content">Gesture Responder System</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/nativemodulesios.html#content">Native Modules (iOS)</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/linking-libraries.html#content">Linking Libraries</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/debugging.html#content">Debugging</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/testing.html#content">Testing</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/runningondevice.html#content">Running On Device</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/embeded-app.html#content">Integration with Existing App</a></li></ul></div><div class="nav-docs-section"><h3>components</h3><ul><li><a style="margin-left:0;" class="" href="/react-native/docs/activityindicatorios.html#content">ActivityIndicatorIOS</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/datepickerios.html#content">DatePickerIOS</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/image.html#content">Image</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/listview.html#content">ListView</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/mapview.html#content">MapView</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/navigator.html#content">Navigator</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/navigatorios.html#content">NavigatorIOS</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/pickerios.html#content">PickerIOS</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/scrollview.html#content">ScrollView</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/sliderios.html#content">SliderIOS</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/switchios.html#content">SwitchIOS</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/tabbarios.html#content">TabBarIOS</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/text.html#content">Text</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/textinput.html#content">TextInput</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/touchablehighlight.html#content">TouchableHighlight</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/touchableopacity.html#content">TouchableOpacity</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/touchablewithoutfeedback.html#content">TouchableWithoutFeedback</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/view.html#content">View</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/webview.html#content">WebView</a></li></ul></div><div class="nav-docs-section"><h3>apis</h3><ul><li><a style="margin-left:0;" class="" href="/react-native/docs/alertios.html#content">AlertIOS</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/animation.html#content">Animation</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/appregistry.html#content">AppRegistry</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/appstateios.html#content">AppStateIOS</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/asyncstorage.html#content">AsyncStorage</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/cameraroll.html#content">CameraRoll</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/interactionmanager.html#content">InteractionManager</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/layoutanimation.html#content">LayoutAnimation</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/linkingios.html#content">LinkingIOS</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/netinfo.html#content">NetInfo</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/panresponder.html#content">PanResponder</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/pixelratio.html#content">PixelRatio</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/pushnotificationios.html#content">PushNotificationIOS</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/statusbarios.html#content">StatusBarIOS</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/stylesheet.html#content">StyleSheet</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/vibrationios.html#content">VibrationIOS</a></li></ul></div><div class="nav-docs-section"><h3>Polyfills</h3><ul><li><a style="margin-left:0;" class="" href="/react-native/docs/flexbox.html#content">Flexbox</a></li><li><a style="margin-left:0;" class="active" href="/react-native/docs/geolocation.html#content">Geolocation</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/network.html#content">Network</a></li><li><a style="margin-left:0;" class="" href="/react-native/docs/timers.html#content">Timers</a></li></ul></div></div><div class="inner-content"><a id="content"></a><h1>Geolocation</h1><div><div><p>/!\ ATTENTION /!\
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You need to add NSLocationWhenInUseUsageDescription key
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in Info.plist to enable geolocation, otherwise it's going
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to <em>fail silently</em>!
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!/ !/</p><p>Geolocation follows the MDN specification:
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<a href="https://developer.mozilla.org/en-US/docs/Web/API/Geolocation">https://developer.mozilla.org/en-US/docs/Web/API/Geolocation</a></p></div><span><h3><a class="anchor" name="methods"></a>Methods <a class="hash-link" href="#methods">#</a></h3><div class="props"><div class="prop"><h4 class="propTitle"><a class="anchor" name="getcurrentposition"></a><span class="propType">static </span>getCurrentPosition<span class="propType">(geo_success: Function, geo_error?: Function, geo_options?: Object)</span> <a class="hash-link" href="#getcurrentposition">#</a></h4></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="watchposition"></a><span class="propType">static </span>watchPosition<span class="propType">(success: Function, error?: Function, options?: Object)</span> <a class="hash-link" href="#watchposition">#</a></h4></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="clearwatch"></a><span class="propType">static </span>clearWatch<span class="propType">(watchID: number)</span> <a class="hash-link" href="#clearwatch">#</a></h4></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="stopobserving"></a><span class="propType">static </span>stopObserving<span class="propType">()</span> <a class="hash-link" href="#stopobserving">#</a></h4></div></div></span></div><div><h3><a class="anchor" name="examples"></a><a class="edit-github" href="https://github.com/facebook/react-native/blob/master/Examples/UIExplorer/GeolocationExample.js">Edit on GitHub</a>Examples <a class="hash-link" href="#examples">#</a></h3><div class="prism language-javascript"><span class="token comment" spellcheck="true">/* eslint no-console: 0 */</span>
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<span class="token string">'use strict'</span><span class="token punctuation">;</span>
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<span class="token keyword">var</span> React <span class="token operator">=</span> <span class="token function">require<span class="token punctuation">(</span></span><span class="token string">'react-native'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">var</span> <span class="token punctuation">{</span>
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StyleSheet<span class="token punctuation">,</span>
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Text<span class="token punctuation">,</span>
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View<span class="token punctuation">,</span>
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<span class="token punctuation">}</span> <span class="token operator">=</span> React<span class="token punctuation">;</span>
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exports<span class="token punctuation">.</span>framework <span class="token operator">=</span> <span class="token string">'React'</span><span class="token punctuation">;</span>
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exports<span class="token punctuation">.</span>title <span class="token operator">=</span> <span class="token string">'Geolocation'</span><span class="token punctuation">;</span>
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exports<span class="token punctuation">.</span>description <span class="token operator">=</span> <span class="token string">'Examples of using the Geolocation API.'</span><span class="token punctuation">;</span>
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exports<span class="token punctuation">.</span>examples <span class="token operator">=</span> <span class="token punctuation">[</span>
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<span class="token punctuation">{</span>
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title<span class="token punctuation">:</span> <span class="token string">'navigator.geolocation'</span><span class="token punctuation">,</span>
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render<span class="token punctuation">:</span> <span class="token keyword">function</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">:</span> ReactElement <span class="token punctuation">{</span>
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<span class="token keyword">return</span> <GeolocationExample <span class="token operator">/</span><span class="token operator">></span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span><span class="token punctuation">,</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">]</span><span class="token punctuation">;</span>
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<span class="token keyword">var</span> GeolocationExample <span class="token operator">=</span> React<span class="token punctuation">.</span><span class="token function">createClass<span class="token punctuation">(</span></span><span class="token punctuation">{</span>
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watchID<span class="token punctuation">:</span> <span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">:</span> <span class="token operator">?</span>number<span class="token punctuation">)</span><span class="token punctuation">,</span>
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getInitialState<span class="token punctuation">:</span> <span class="token keyword">function</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token keyword">return</span> <span class="token punctuation">{</span>
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initialPosition<span class="token punctuation">:</span> <span class="token string">'unknown'</span><span class="token punctuation">,</span>
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lastPosition<span class="token punctuation">:</span> <span class="token string">'unknown'</span><span class="token punctuation">,</span>
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<span class="token punctuation">}</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span><span class="token punctuation">,</span>
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componentDidMount<span class="token punctuation">:</span> <span class="token keyword">function</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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navigator<span class="token punctuation">.</span>geolocation<span class="token punctuation">.</span><span class="token function">getCurrentPosition<span class="token punctuation">(</span></span>
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<span class="token punctuation">(</span>initialPosition<span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">setState<span class="token punctuation">(</span></span><span class="token punctuation">{</span>initialPosition<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
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<span class="token punctuation">(</span>error<span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> console<span class="token punctuation">.</span><span class="token function">error<span class="token punctuation">(</span></span>error<span class="token punctuation">)</span>
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<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">this</span><span class="token punctuation">.</span>watchID <span class="token operator">=</span> navigator<span class="token punctuation">.</span>geolocation<span class="token punctuation">.</span><span class="token function">watchPosition<span class="token punctuation">(</span></span><span class="token punctuation">(</span>lastPosition<span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">{</span>
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<span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">setState<span class="token punctuation">(</span></span><span class="token punctuation">{</span>lastPosition<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span><span class="token punctuation">,</span>
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componentWillUnmount<span class="token punctuation">:</span> <span class="token keyword">function</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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navigator<span class="token punctuation">.</span>geolocation<span class="token punctuation">.</span><span class="token function">clearWatch<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">.</span>watchID<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span><span class="token punctuation">,</span>
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render<span class="token punctuation">:</span> <span class="token keyword">function</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token keyword">return</span> <span class="token punctuation">(</span>
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<View<span class="token operator">></span>
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<Text<span class="token operator">></span>
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<Text style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>title<span class="token punctuation">}</span><span class="token operator">></span>Initial position<span class="token punctuation">:</span> <<span class="token operator">/</span>Text<span class="token operator">></span>
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<span class="token punctuation">{</span>JSON<span class="token punctuation">.</span><span class="token function">stringify<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">.</span>state<span class="token punctuation">.</span>initialPosition<span class="token punctuation">)</span><span class="token punctuation">}</span>
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<<span class="token operator">/</span>Text<span class="token operator">></span>
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<Text<span class="token operator">></span>
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<Text style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>title<span class="token punctuation">}</span><span class="token operator">></span>Current position<span class="token punctuation">:</span> <<span class="token operator">/</span>Text<span class="token operator">></span>
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<span class="token punctuation">{</span>JSON<span class="token punctuation">.</span><span class="token function">stringify<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">.</span>state<span class="token punctuation">.</span>lastPosition<span class="token punctuation">)</span><span class="token punctuation">}</span>
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<<span class="token operator">/</span>Text<span class="token operator">></span>
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<<span class="token operator">/</span>View<span class="token operator">></span>
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<span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">var</span> styles <span class="token operator">=</span> StyleSheet<span class="token punctuation">.</span><span class="token function">create<span class="token punctuation">(</span></span><span class="token punctuation">{</span>
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title<span class="token punctuation">:</span> <span class="token punctuation">{</span>
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fontWeight<span class="token punctuation">:</span> <span class="token string">'500'</span><span class="token punctuation">,</span>
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<span class="token punctuation">}</span><span class="token punctuation">,</span>
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<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span></div></div><div class="docs-prevnext"><a class="docs-next" href="network.html#content">Next →</a></div></div></section><footer class="wrap"><div class="right">© 2015 Facebook Inc.</div></footer></div><div id="fb-root"></div><script>
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