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<!DOCTYPE html><html><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><title>Platform Specific Code – React Native | A framework for building native apps using React</title><meta name="viewport" content="width=device-width"><meta property="og:title" content="Platform Specific Code – 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"><base href="/react-native/"><link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css"><link rel="shortcut icon" href="img/favicon.png?2"><link rel="stylesheet" href="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=""><img src="img/header_logo.png">React Native</a><a class="nav-version" href="/react-native/versions.html">0.25</a><div class="nav-site-wrapper"><ul class="nav-site nav-site-internal"><li><a href="docs/getting-started.html" class="active">Docs</a></li><li><a href="support.html" class="">Support</a></li><li><a href="showcase.html" class="">Showcase</a></li><li><a href="blog/" class="">Blog</a></li></ul><div class="algolia-search-wrapper"><input id="algolia-doc-search" type="text" placeholder="Search docs..."></div><ul class="nav-site nav-site-external"><li><a href="https://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="docs/getting-started.html#content">Getting Started</a></li><li><a style="margin-left:0;" class="" href="docs/tutorial.html#content">Tutorial</a></li></ul></div><div class="nav-docs-section"><h3>Community Resources</h3><ul><li><a style="margin-left:0;" class="" href="docs/videos.html#content">Videos</a></li><li><a target="_blank" style="margin-left:0;" class="" href="http://reactnative.cc/">Newsletter</a></li></ul></div><div class="nav-docs-section"><h3>Guides</h3><ul><li><a style="margin-left:0;" class="" href="docs/style.html#content">Style</a></li><li><a style="margin-left:0;" class="" href="docs/images.html#content">Images</a></li><li><a style="margin-left:0;" class="" href="docs/gesture-responder-system.html#content">Gesture Responder System</a></li><li><a style="margin-left:0;" class="" href="docs/animations.html#content">Animations</a></li><li><a style="margin-left:0;" class="" href="docs/accessibility.html#content">Accessibility</a></li><li><a style="margin-left:0;" class="" href="docs/direct-manipulation.html#content">Direct Manipulation</a></li><li><a style="margin-left:0;" class="" href="docs/debugging.html#content">Debugging</a></li><li><a style="margin-left:0;" class="" href="docs/testing.html#content">Testing</a></li><li><a style="margin-left:0;" class="" href="docs/javascript-environment.html#content">JavaScript Environment</a></li><li><a style="margin-left:0;" class="" href="docs/navigator-comparison.html#content">Navigator Comparison</a></li><li><a style="margin-left:0;" class="" href="docs/known-issues.html#content">Known Issues</a></li><li><a style="margin-left:0;" class="" href="docs/performance.html#content">Performance</a></li><li><a style="margin-left:0;" class="" href="docs/upgrading.html#content">Upgrading</a></li><li><a style="margin-left:0;" class="active" href="docs/platform-specific-code.html#content">Platform Specific Code</a></li></ul></div><div class="nav-docs-section"><h3>Guides (iOS)</h3><ul><li><a style="margin-left:0;" class="" href="docs/native-modules-ios.html#content">Native Modules</a></li><li><a style="margin-left:0;" class="" href="docs/native-components-ios.html#content">Native UI Components</a></li><li><a style="margin-left:0;" class="" href="docs/linking-libraries-ios.html#content">Linking Libraries</a></li><li><a style="margin-left:0;" class="" href="docs/running-on-device-ios.html#content">Running On Device</a></li><li><a style="margin-left:0;" class="" href="docs/embedded-app-ios.html#content">Integrating with Existing Apps</a></li><li><a style="margin-left:0;" class="" href="docs/communication-ios.html#content">Communication between native and React Native</a></li></ul></div><div class="nav-docs-section"><h3>Guides (Android)</h3><ul><li><a style="margin-left:0;" class="" href="docs/native-modules-android.html#content">Native Modules</a></li><li><a style="margin-left:0;" class="" href="docs/native-components-android.html#content">Native UI Components</a></li><li><a style="margin-left:0;" class="" href="docs/running-on-device-android.html#content">Running On Device</a></li><li><a style="margin-left:0;" class="" href="docs/embedded-app-android.html#content">Integrating with Existing Apps</a></li><li><a style="margin-left:0;" class="" href="docs/signed-apk-android.html#content">Generating Signed APK</a></li><li><a style="margin-left:0;" class="" href="docs/android-ui-performance.html#content">Profiling Android UI Performance</a></li><li><a style="margin-left:0;" class="" href="docs/android-building-from-source.html#content">Building React Native from source</a></li></ul></div><div class="nav-docs-section"><h3>components</h3><ul><li><a style="margin-left:0;" class="" href="docs/activityindicatorios.html#content">ActivityIndicatorIOS</a></li><li><a style="margin-left:0;" class="" href="docs/datepickerios.html#content">DatePickerIOS</a></li><li><a style="margin-left:0;" class="" href="docs/drawerlayoutandroid.html#content">DrawerLayoutAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/image.html#content">Image</a></li><li><a style="margin-left:0;" class="" href="docs/listview.html#content">ListView</a></li><li><a style="margin-left:0;" class="" href="docs/mapview.html#content">MapView</a></li><li><a style="margin-left:0;" class="" href="docs/modal.html#content">Modal</a></li><li><a style="margin-left:0;" class="" href="docs/navigator.html#content">Navigator</a></li><li><a style="margin-left:0;" class="" href="docs/navigatorios.html#content">NavigatorIOS</a></li><li><a style="margin-left:0;" class="" href="docs/pickerios.html#content">PickerIOS</a></li><li><a style="margin-left:0;" class="" href="docs/picker.html#content">Picker</a></li><li><a style="margin-left:0;" class="" href="docs/progressbarandroid.html#content">ProgressBarAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/progressviewios.html#content">ProgressViewIOS</a></li><li><a style="margin-left:0;" class="" href="docs/refreshcontrol.html#content">RefreshControl</a></li><li><a style="margin-left:0;" class="" href="docs/scrollview.html#content">ScrollView</a></li><li><a style="margin-left:0;" class="" href="docs/segmentedcontrolios.html#content">SegmentedControlIOS</a></li><li><a style="margin-left:0;" class="" href="docs/slider.html#content">Slider</a></li><li><a style="margin-left:0;" class="" href="docs/sliderios.html#content">SliderIOS</a></li><li><a style="margin-left:0;" class="" href="docs/statusbar.html#content">StatusBar</a></li><li><a style="margin-left:0;" class="" href="docs/switch.html#content">Switch</a></li><li><a style="margin-left:0;" class="" href="docs/tabbarios.html#content">TabBarIOS</a></li><li><a style="margin-left:0;" class="" href="docs/tabbarios-item.html#content">TabBarIOS.Item</a></li><li><a style="margin-left:0;" class="" href="docs/text.html#content">Text</a></li><li><a style="margin-left:0;" class="" href="docs/textinput.html#content">TextInput</a></li><li><a style="margin-left:0;" class="" href="docs/toolbarandroid.html#content">ToolbarAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/touchablehighlight.html#content">TouchableHighlight</a></li><li><a style="margin-left:0;" class="" href="docs/touchablenativefeedback.html#content">TouchableNativeFeedback</a></li><li><a style="margin-left:0;" class="" href="docs/touchableopacity.html#content">TouchableOpacity</a></li><li><a style="margin-left:0;" class="" href="docs/touchablewithoutfeedback.html#content">TouchableWithoutFeedback</a></li><li><a style="margin-left:0;" class="" href="docs/view.html#content">View</a></li><li><a style="margin-left:0;" class="" href="docs/viewpagerandroid.html#content">ViewPagerAndroid</a></li><li><a style="margin-left:0;" class="" href="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="docs/actionsheetios.html#content">ActionSheetIOS</a></li><li><a style="margin-left:0;" class="" href="docs/alert.html#content">Alert</a></li><li><a style="margin-left:0;" class="" href="docs/alertios.html#content">AlertIOS</a></li><li><a style="margin-left:0;" class="" href="docs/animated.html#content">Animated</a></li><li><a style="margin-left:0;" class="" href="docs/appregistry.html#content">AppRegistry</a></li><li><a style="margin-left:0;" class="" href="docs/appstateios.html#content">AppStateIOS</a></li><li><a style="margin-left:0;" class="" href="docs/appstate.html#content">AppState</a></li><li><a style="margin-left:0;" class="" href="docs/asyncstorage.html#content">AsyncStorage</a></li><li><a style="margin-left:0;" class="" href="docs/backandroid.html#content">BackAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/cameraroll.html#content">CameraRoll</a></li><li><a style="margin-left:0;" class="" href="docs/clipboard.html#content">Clipboard</a></li><li><a style="margin-left:0;" class="" href="docs/datepickerandroid.html#content">DatePickerAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/dimensions.html#content">Dimensions</a></li><li><a style="margin-left:0;" class="" href="docs/intentandroid.html#content">IntentAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/interactionmanager.html#content">InteractionManager</a></li><li><a style="margin-left:0;" class="" href="docs/layoutanimation.html#content">LayoutAnimation</a></li><li><a style="margin-left:0;" class="" href="docs/linking.html#content">Linking</a></li><li><a style="margin-left:0;" class="" href="docs/linkingios.html#content">LinkingIOS</a></li><li><a style="margin-left:0;" class="" href="docs/nativemethodsmixin.html#content">NativeMethodsMixin</a></li><li><a style="margin-left:0;" class="" href="docs/netinfo.html#content">NetInfo</a></li><li><a style="margin-left:0;" class="" href="docs/panresponder.html#content">PanResponder</a></li><li><a style="margin-left:0;" class="" href="docs/pixelratio.html#content">PixelRatio</a></li><li><a style="margin-left:0;" class="" href="docs/pushnotificationios.html#content">PushNotificationIOS</a></li><li><a style="margin-left:0;" class="" href="docs/statusbarios.html#content">StatusBarIOS</a></li><li><a style="margin-left:0;" class="" href="docs/stylesheet.html#content">StyleSheet</a></li><li><a style="margin-left:0;" class="" href="docs/timepickerandroid.html#content">TimePickerAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/toastandroid.html#content">ToastAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/vibrationios.html#content">VibrationIOS</a></li><li><a style="margin-left:0;" class="" href="docs/vibration.html#content">Vibration</a></li></ul></div><div class="nav-docs-section"><h3>Polyfills</h3><ul><li><a style="margin-left:0;" class="" href="docs/flexbox.html#content">Flexbox</a></li><li><a style="margin-left:0;" class="" href="docs/shadowproptypesios.html#content">ShadowPropTypesIOS</a></li><li><a style="margin-left:0;" class="" href="docs/geolocation.html#content">Geolocation</a></li><li><a style="margin-left:0;" class="" href="docs/network.html#content">Network</a></li><li><a style="margin-left:0;" class="" href="docs/timers.html#content">Timers</a></li><li><a style="margin-left:0;" class="" href="docs/colors.html#content">Colors</a></li></ul></div></div><div class="inner-content"><a id="content"></a><table width="100%"><tbody><tr><td><h1><a class="anchor" name="platform-specific-code"></a>Platform Specific Code <a class="hash-link" href="docs/platform-specific-code.html#platform-specific-code">#</a></h1></td><td style="text-align:right;"><a target="_blank" href="https://github.com/facebook/react-native/blob/master/docs/PlatformSpecificInformation.md">Edit on GitHub</a></td></tr></tbody></table><div><p>When building a cross-platform app, the need to write different code for different platforms may arise. This can always be achieved by organizing the various components in different folders:</p><div class="prism language-javascript"><span class="token operator">/</span>common<span class="token regex">/components/</span>
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<span class="token operator">/</span>android<span class="token regex">/components/</span>
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<span class="token operator">/</span>ios<span class="token regex">/components/</span></div><p>Another option may be naming the components differently depending on the platform they are going to be used in:</p><div class="prism language-javascript">BigButtonIOS<span class="token punctuation">.</span>js
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BigButtonAndroid<span class="token punctuation">.</span>js</div><p>But React Native provides two alternatives to easily organize your code separating it by platform:</p><h2><a class="anchor" name="platform-specific-extensions"></a>Platform specific extensions <a class="hash-link" href="docs/platform-specific-code.html#platform-specific-extensions">#</a></h2><p>React Native will detect when a file has a <code>.ios.</code> or <code>.android.</code> extension and load the right file for each platform when requiring them from other components.</p><p>For example, you can have these files in your project:</p><div class="prism language-javascript">BigButton<span class="token punctuation">.</span>ios<span class="token punctuation">.</span>js
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BigButton<span class="token punctuation">.</span>android<span class="token punctuation">.</span>js</div><p>With this setup, you can just require the files from a different component without paying attention to the platform in which the app will run.</p><div class="prism language-javascript">import BigButton from <span class="token string">'./components/BigButton'</span><span class="token punctuation">;</span></div><p>React Native will import the correct component for the running platform.</p><h2><a class="anchor" name="platform-module"></a>Platform module <a class="hash-link" href="docs/platform-specific-code.html#platform-module">#</a></h2><p>A module is provided by React Native to detect what is the platform in which the app is running. This piece of functionality can be useful when only small parts of a component are platform specific.</p><div class="prism language-javascript"><span class="token keyword">var</span> <span class="token punctuation">{</span> Platform <span class="token punctuation">}</span> <span class="token operator">=</span> React<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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height<span class="token punctuation">:</span> <span class="token punctuation">(</span>Platform<span class="token punctuation">.</span>OS <span class="token operator">===</span> <span class="token string">'ios'</span><span class="token punctuation">)</span> <span class="token operator">?</span> <span class="token number">200</span> <span class="token punctuation">:</span> <span class="token number">100</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><p><code>Platform.OS</code> will be <code>ios</code> when running in iOS and <code>android</code> when running in an Android device or simulator.</p><h3><a class="anchor" name="detecting-android-version"></a>Detecting Android version <a class="hash-link" href="docs/platform-specific-code.html#detecting-android-version">#</a></h3><p>On Android, the Platform module can be also used to detect which is the version of the Android Platform in which the app is running</p><div class="prism language-javascript"><span class="token keyword">var</span> <span class="token punctuation">{</span>Platform<span class="token punctuation">}</span> <span class="token operator">=</span> React<span class="token punctuation">;</span>
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<span class="token keyword">if</span><span class="token punctuation">(</span>Platform<span class="token punctuation">.</span>Version <span class="token operator">===</span> <span class="token number">21</span><span class="token punctuation">)</span><span class="token punctuation">{</span>
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console<span class="token punctuation">.</span><span class="token function">log<span class="token punctuation">(</span></span><span class="token string">'Running on Lollipop!'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span></div></div><div class="docs-prevnext"><a class="docs-next" href="docs/native-modules-ios.html#content">Next →</a></div><div class="survey"><div class="survey-image"></div><p>We are planning improvements to the React Native documentation. Your responses to this short survey will go a long way in helping us provide valuable content. Thank you!</p><center><a class="button" href="https://www.facebook.com/survey?oid=681969738611332">Take Survey</a></center></div></div></section><footer class="wrap"><div class="center">© 2016 Facebook Inc.</div></footer></div><div id="fb-root"></div><script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script><script>
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