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<!DOCTYPE html><html><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><title>AppState – React Native | A framework for building native apps using React</title><meta name="viewport" content="width=device-width"><meta property="og:title" content="AppState – 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">0.28</a><div class="nav-site-wrapper"><ul class="nav-site nav-site-internal"><li><a href="docs/getting-started.html" class="active" data-target=".nav-docs">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-viewport"><div class="nav-docs-section"><h3>Quick Start</h3><ul><li><a style="margin-left:0;" class="" href="docs/getting-started.html">Getting Started</a></li></ul></div><div class="nav-docs-section"><h3>Tutorials</h3><ul><li><a style="margin-left:0;" class="" href="docs/tutorial-core-components.html">Core Components</a></li></ul></div><div class="nav-docs-section"><h3>Sample Applications</h3><ul><li><a style="margin-left:0;" class="" href="docs/sample-application-movies.html">Movie Fetcher</a></li><li><a target="_blank" style="margin-left:0;" class="" href="http://makeitopen.com/">F8 2016 App</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">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">Style</a></li><li><a style="margin-left:0;" class="" href="docs/images.html">Images</a></li><li><a style="margin-left:0;" class="" href="docs/gesture-responder-system.html">Gesture Responder System</a></li><li><a style="margin-left:0;" class="" href="docs/animations.html">Animations</a></li><li><a style="margin-left:0;" class="" href="docs/accessibility.html">Accessibility</a></li><li><a style="margin-left:0;" class="" href="docs/direct-manipulation.html">Direct Manipulation</a></li><li><a style="margin-left:0;" class="" href="docs/debugging.html">Debugging</a></li><li><a style="margin-left:0;" class="" href="docs/testing.html">Testing</a></li><li><a style="margin-left:0;" class="" href="docs/javascript-environment.html">JavaScript Environment</a></li><li><a style="margin-left:0;" class="" href="docs/navigator-comparison.html">Navigator Comparison</a></li><li><a style="margin-left:0;" class="" href="docs/known-issues.html">Known Issues</a></li><li><a style="margin-left:0;" class="" href="docs/performance.html">Performance</a></li><li><a style="margin-left:0;" class="" href="docs/upgrading.html">Upgrading</a></li><li><a style="margin-left:0;" class="" href="docs/platform-specific-code.html">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">Native Modules</a></li><li><a style="margin-left:0;" class="" href="docs/native-components-ios.html">Native UI Components</a></li><li><a style="margin-left:0;" class="" href="docs/linking-libraries-ios.html">Linking Libraries</a></li><li><a style="margin-left:0;" class="" href="docs/running-on-device-ios.html">Running On Device</a></li><li><a style="margin-left:0;" class="" href="docs/embedded-app-ios.html">Integrating with Existing Apps</a></li><li><a style="margin-left:0;" class="" href="docs/communication-ios.html">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">Native Modules</a></li><li><a style="margin-left:0;" class="" href="docs/native-components-android.html">Native UI Components</a></li><li><a style="margin-left:0;" class="" href="docs/running-on-device-android.html">Running On Device</a></li><li><a style="margin-left:0;" class="" href="docs/embedded-app-android.html">Integrating with Existing Apps</a></li><li><a style="margin-left:0;" class="" href="docs/signed-apk-android.html">Generating Signed APK</a></li><li><a style="margin-left:0;" class="" href="docs/android-ui-performance.html">Profiling Android UI Performance</a></li><li><a style="margin-left:0;" class="" href="docs/android-building-from-source.html">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/activityindicator.html">ActivityIndicator</a></li><li><a style="margin-left:0;" class="" href="docs/datepickerios.html">DatePickerIOS</a></li><li><a style="margin-left:0;" class="" href="docs/drawerlayoutandroid.html">DrawerLayoutAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/image.html">Image</a></li><li><a style="margin-left:0;" class="" href="docs/listview.html">ListView</a></li><li><a style="margin-left:0;" class="" href="docs/mapview.html">MapView</a></li><li><a style="margin-left:0;" class="" href="docs/modal.html">Modal</a></li><li><a style="margin-left:0;" class="" href="docs/navigator.html">Navigator</a></li><li><a style="margin-left:0;" class="" href="docs/navigatorios.html">NavigatorIOS</a></li><li><a style="margin-left:0;" class="" href="docs/pickerios.html">PickerIOS</a></li><li><a style="margin-left:0;" class="" href="docs/picker.html">Picker</a></li><li><a style="margin-left:0;" class="" href="docs/progressbarandroid.html">ProgressBarAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/progressviewios.html">ProgressViewIOS</a></li><li><a style="margin-left:0;" class="" href="docs/refreshcontrol.html">RefreshControl</a></li><li><a style="margin-left:0;" class="" href="docs/scrollview.html">ScrollView</a></li><li><a style="margin-left:0;" class="" href="docs/segmentedcontrolios.html">SegmentedControlIOS</a></li><li><a style="margin-left:0;" class="" href="docs/slider.html">Slider</a></li><li><a style="margin-left:0;" class="" href="docs/sliderios.html">SliderIOS</a></li><li><a style="margin-left:0;" class="" href="docs/statusbar.html">StatusBar</a></li><li><a style="margin-left:0;" class="" href="docs/switch.html">Switch</a></li><li><a style="margin-left:0;" class="" href="docs/tabbarios.html">TabBarIOS</a></li><li><a style="margin-left:0;" class="" href="docs/tabbarios-item.html">TabBarIOS.Item</a></li><li><a style="margin-left:0;" class="" href="docs/text.html">Text</a></li><li><a style="margin-left:0;" class="" href="docs/textinput.html">TextInput</a></li><li><a style="margin-left:0;" class="" href="docs/toolbarandroid.html">ToolbarAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/touchablehighlight.html">TouchableHighlight</a></li><li><a style="margin-left:0;" class="" href="docs/touchablenativefeedback.html">TouchableNativeFeedback</a></li><li><a style="margin-left:0;" class="" href="docs/touchableopacity.html">TouchableOpacity</a></li><li><a style="margin-left:0;" class="" href="docs/touchablewithoutfeedback.html">TouchableWithoutFeedback</a></li><li><a style="margin-left:0;" class="" href="docs/view.html">View</a></li><li><a style="margin-left:0;" class="" href="docs/viewpagerandroid.html">ViewPagerAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/webview.html">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">ActionSheetIOS</a></li><li><a style="margin-left:0;" class="" href="docs/alert.html">Alert</a></li><li><a style="margin-left:0;" class="" href="docs/alertios.html">AlertIOS</a></li><li><a style="margin-left:0;" class="" href="docs/animated.html">Animated</a></li><li><a style="margin-left:0;" class="" href="docs/appregistry.html">AppRegistry</a></li><li><a style="margin-left:0;" class="active" href="docs/appstate.html">AppState</a></li><li><a style="margin-left:0;" class="" href="docs/asyncstorage.html">AsyncStorage</a></li><li><a style="margin-left:0;" class="" href="docs/backandroid.html">BackAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/cameraroll.html">CameraRoll</a></li><li><a style="margin-left:0;" class="" href="docs/clipboard.html">Clipboard</a></li><li><a style="margin-left:0;" class="" href="docs/datepickerandroid.html">DatePickerAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/dimensions.html">Dimensions</a></li><li><a style="margin-left:0;" class="" href="docs/intentandroid.html">IntentAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/interactionmanager.html">InteractionManager</a></li><li><a style="margin-left:0;" class="" href="docs/layoutanimation.html">LayoutAnimation</a></li><li><a style="margin-left:0;" class="" href="docs/linking.html">Linking</a></li><li><a style="margin-left:0;" class="" href="docs/nativemethodsmixin.html">NativeMethodsMixin</a></li><li><a style="margin-left:0;" class="" href="docs/netinfo.html">NetInfo</a></li><li><a style="margin-left:0;" class="" href="docs/panresponder.html">PanResponder</a></li><li><a style="margin-left:0;" class="" href="docs/pixelratio.html">PixelRatio</a></li><li><a style="margin-left:0;" class="" href="docs/pushnotificationios.html">PushNotificationIOS</a></li><li><a style="margin-left:0;" class="" href="docs/statusbarios.html">StatusBarIOS</a></li><li><a style="margin-left:0;" class="" href="docs/stylesheet.html">StyleSheet</a></li><li><a style="margin-left:0;" class="" href="docs/timepickerandroid.html">TimePickerAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/toastandroid.html">ToastAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/vibrationios.html">VibrationIOS</a></li><li><a style="margin-left:0;" class="" href="docs/vibration.html">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">Flexbox</a></li><li><a style="margin-left:0;" class="" href="docs/shadowproptypesios.html">ShadowPropTypesIOS</a></li><li><a style="margin-left:0;" class="" href="docs/geolocation.html">Geolocation</a></li><li><a style="margin-left:0;" class="" href="docs/network.html">Network</a></li><li><a style="margin-left:0;" class="" href="docs/timers.html">Timers</a></li><li><a style="margin-left:0;" class="" href="docs/colors.html">Colors</a></li></ul></div></div></div><div class="inner-content"><a id="content"></a><table width="100%"><tbody><tr><td><h1><a class="anchor" name="appstate"></a>AppState <a class="hash-link" href="docs/appstate.html#appstate">#</a></h1></td><td style="text-align:right;"><a target="_blank" href="https://github.com/facebook/react-native/blob/0.28-stable/Libraries/AppState/AppState.js">Edit on GitHub</a></td></tr></tbody></table><div><div><p><code>AppState</code> can tell you if the app is in the foreground or background,
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and notify you when the state changes.</p><p>AppState is frequently used to determine the intent and proper behavior when
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handling push notifications.</p><h3><a class="anchor" name="app-states"></a>App States <a class="hash-link" href="docs/appstate.html#app-states">#</a></h3><ul><li><code>active</code> - The app is running in the foreground</li><li><code>background</code> - The app is running in the background. The user is either
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in another app or on the home screen</li><li><code>inactive</code> - This is a state that occurs when transitioning between
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foreground & background, and during periods of inactivity such as
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entering the Multitasking view or in the event of an incoming call</li></ul><p>For more information, see
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<a href="https://developer.apple.com/library/ios/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/TheAppLifeCycle/TheAppLifeCycle.html" target="_blank">Apple's documentation</a></p><h3><a class="anchor" name="basic-usage"></a>Basic Usage <a class="hash-link" href="docs/appstate.html#basic-usage">#</a></h3><p>To see the current state, you can check <code>AppState.currentState</code>, which
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will be kept up-to-date. However, <code>currentState</code> will be null at launch
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while <code>AppState</code> retrieves it over the bridge.</p><div class="prism language-javascript">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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currentAppState<span class="token punctuation">:</span> AppState<span class="token punctuation">.</span>currentState<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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AppState<span class="token punctuation">.</span><span class="token function">addEventListener<span class="token punctuation">(</span></span><span class="token string">'change'</span><span class="token punctuation">,</span> <span class="token keyword">this</span><span class="token punctuation">.</span>_handleAppStateChange<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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AppState<span class="token punctuation">.</span><span class="token function">removeEventListener<span class="token punctuation">(</span></span><span class="token string">'change'</span><span class="token punctuation">,</span> <span class="token keyword">this</span><span class="token punctuation">.</span>_handleAppStateChange<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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_handleAppStateChange<span class="token punctuation">:</span> <span class="token keyword">function</span><span class="token punctuation">(</span>currentAppState<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><span class="token function">setState<span class="token punctuation">(</span></span><span class="token punctuation">{</span> currentAppState<span class="token punctuation">,</span> <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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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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<Text<span class="token operator">></span>Current state is<span class="token punctuation">:</span> <span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>state<span class="token punctuation">.</span>currentAppState<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><span class="token punctuation">;</span>
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<span class="token punctuation">}</span><span class="token punctuation">,</span></div><p>This example will only ever appear to say "Current state is: active" because
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the app is only visible to the user when in the <code>active</code> state, and the null
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state will happen only momentarily.</p></div><span><h3><a class="anchor" name="methods"></a>Methods <a class="hash-link" href="docs/appstate.html#methods">#</a></h3><div class="props"><div class="prop"><h4 class="propTitle"><a class="anchor" name="constructor"></a>constructor<span class="propType">()</span> <a class="hash-link" href="docs/appstate.html#constructor">#</a></h4></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="addeventlistener"></a>addEventListener<span class="propType">(type, handler)</span> <a class="hash-link" href="docs/appstate.html#addeventlistener">#</a></h4><div><p>Add a handler to AppState changes by listening to the <code>change</code> event type
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and providing the handler</p><p>TODO: now that AppState is a subclass of NativeEventEmitter, we could deprecate
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<code>addEventListener</code> and <code>removeEventListener</code> and just use <code>addListener</code> and
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<code>listener.remove()</code> directly. That will be a breaking change though, as both
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the method and event names are different (addListener events are currently
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required to be globally unique).</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="removeeventlistener"></a>removeEventListener<span class="propType">(type, handler)</span> <a class="hash-link" href="docs/appstate.html#removeeventlistener">#</a></h4><div><p>Remove a handler by passing the <code>change</code> event type and the handler</p></div></div></div></span></div><div><div><table width="100%"><tbody><tr><td><h3><a class="anchor" name="examples"></a>Examples <a class="hash-link" href="docs/appstate.html#examples">#</a></h3></td><td style="text-align:right;"><a target="_blank" href="https://github.com/facebook/react-native/blob/0.28-stable/Examples/UIExplorer/AppStateExample.js">Edit on GitHub</a></td></tr></tbody></table><div class="prism language-javascript"><span class="token string">'use strict'</span><span class="token punctuation">;</span>
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const React <span class="token operator">=</span> <span class="token function">require<span class="token punctuation">(</span></span><span class="token string">'react'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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const ReactNative <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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const <span class="token punctuation">{</span>
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AppState<span class="token punctuation">,</span>
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Text<span class="token punctuation">,</span>
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View
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<span class="token punctuation">}</span> <span class="token operator">=</span> ReactNative<span class="token punctuation">;</span>
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<span class="token keyword">var</span> AppStateSubscription <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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<span class="token function">getInitialState<span class="token punctuation">(</span></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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appState<span class="token punctuation">:</span> AppState<span class="token punctuation">.</span>currentState<span class="token punctuation">,</span>
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previousAppStates<span class="token punctuation">:</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">,</span>
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memoryWarnings<span class="token punctuation">:</span> <span class="token number">0</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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AppState<span class="token punctuation">.</span><span class="token function">addEventListener<span class="token punctuation">(</span></span><span class="token string">'change'</span><span class="token punctuation">,</span> <span class="token keyword">this</span><span class="token punctuation">.</span>_handleAppStateChange<span class="token punctuation">)</span><span class="token punctuation">;</span>
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AppState<span class="token punctuation">.</span><span class="token function">addEventListener<span class="token punctuation">(</span></span><span class="token string">'memoryWarning'</span><span class="token punctuation">,</span> <span class="token keyword">this</span><span class="token punctuation">.</span>_handleMemoryWarning<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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AppState<span class="token punctuation">.</span><span class="token function">removeEventListener<span class="token punctuation">(</span></span><span class="token string">'change'</span><span class="token punctuation">,</span> <span class="token keyword">this</span><span class="token punctuation">.</span>_handleAppStateChange<span class="token punctuation">)</span><span class="token punctuation">;</span>
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AppState<span class="token punctuation">.</span><span class="token function">removeEventListener<span class="token punctuation">(</span></span><span class="token string">'memoryWarning'</span><span class="token punctuation">,</span> <span class="token keyword">this</span><span class="token punctuation">.</span>_handleMemoryWarning<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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_handleMemoryWarning<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">this</span><span class="token punctuation">.</span><span class="token function">setState<span class="token punctuation">(</span></span><span class="token punctuation">{</span>memoryWarnings<span class="token punctuation">:</span> <span class="token keyword">this</span><span class="token punctuation">.</span>state<span class="token punctuation">.</span>memoryWarnings <span class="token operator">+</span> <span class="token number">1</span><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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_handleAppStateChange<span class="token punctuation">:</span> <span class="token keyword">function</span><span class="token punctuation">(</span>appState<span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token keyword">var</span> previousAppStates <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>state<span class="token punctuation">.</span>previousAppStates<span class="token punctuation">.</span><span class="token function">slice<span class="token punctuation">(</span></span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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previousAppStates<span class="token punctuation">.</span><span class="token function">push<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">.</span>state<span class="token punctuation">.</span>appState<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><span class="token function">setState<span class="token punctuation">(</span></span><span class="token punctuation">{</span>
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appState<span class="token punctuation">,</span>
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previousAppStates<span class="token punctuation">,</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>props<span class="token punctuation">.</span>showMemoryWarnings<span class="token punctuation">)</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><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>state<span class="token punctuation">.</span>memoryWarnings<span class="token punctuation">}</span><<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 keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>props<span class="token punctuation">.</span>showCurrentOnly<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><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>state<span class="token punctuation">.</span>appState<span class="token punctuation">}</span><<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 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><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>previousAppStates<span class="token punctuation">)</span><span class="token punctuation">}</span><<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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exports<span class="token punctuation">.</span>title <span class="token operator">=</span> <span class="token string">'AppState'</span><span class="token punctuation">;</span>
|
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|
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|
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<span class="token punctuation">{</span>
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title<span class="token punctuation">:</span> <span class="token string">'AppState.currentState'</span><span class="token punctuation">,</span>
|
||
description<span class="token punctuation">:</span> <span class="token string">'Can be null on app initialization'</span><span class="token punctuation">,</span>
|
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<span class="token function">render<span class="token punctuation">(</span></span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">return</span> <Text<span class="token operator">></span><span class="token punctuation">{</span>AppState<span class="token punctuation">.</span>currentState<span class="token punctuation">}</span><<span class="token operator">/</span>Text<span class="token operator">></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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<span class="token punctuation">{</span>
|
||
title<span class="token punctuation">:</span> <span class="token string">'Subscribed AppState:'</span><span class="token punctuation">,</span>
|
||
description<span class="token punctuation">:</span> <span class="token string">'This changes according to the current state, so you can only ever see it rendered as "active"'</span><span class="token punctuation">,</span>
|
||
<span class="token function">render<span class="token punctuation">(</span></span><span class="token punctuation">)</span><span class="token punctuation">:</span> ReactElement<any<span class="token operator">></span> <span class="token punctuation">{</span> <span class="token keyword">return</span> <AppStateSubscription showCurrentOnly<span class="token operator">=</span><span class="token punctuation">{</span><span class="token boolean">true</span><span class="token punctuation">}</span> <span class="token operator">/</span><span class="token operator">></span><span class="token punctuation">;</span> <span class="token punctuation">}</span>
|
||
<span class="token punctuation">}</span><span class="token punctuation">,</span>
|
||
<span class="token punctuation">{</span>
|
||
title<span class="token punctuation">:</span> <span class="token string">'Previous states:'</span><span class="token punctuation">,</span>
|
||
<span class="token function">render<span class="token punctuation">(</span></span><span class="token punctuation">)</span><span class="token punctuation">:</span> ReactElement<any<span class="token operator">></span> <span class="token punctuation">{</span> <span class="token keyword">return</span> <AppStateSubscription showCurrentOnly<span class="token operator">=</span><span class="token punctuation">{</span><span class="token boolean">false</span><span class="token punctuation">}</span> <span class="token operator">/</span><span class="token operator">></span><span class="token punctuation">;</span> <span class="token punctuation">}</span>
|
||
<span class="token punctuation">}</span><span class="token punctuation">,</span>
|
||
<span class="token punctuation">{</span>
|
||
platform<span class="token punctuation">:</span> <span class="token string">'ios'</span><span class="token punctuation">,</span>
|
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title<span class="token punctuation">:</span> <span class="token string">'Memory Warnings'</span><span class="token punctuation">,</span>
|
||
description<span class="token punctuation">:</span> <span class="token string">'In the IOS simulator, hit Shift+Command+M to simulate a memory warning.'</span><span class="token punctuation">,</span>
|
||
<span class="token function">render<span class="token punctuation">(</span></span><span class="token punctuation">)</span><span class="token punctuation">:</span> ReactElement<any<span class="token operator">></span> <span class="token punctuation">{</span> <span class="token keyword">return</span> <AppStateSubscription showMemoryWarnings<span class="token operator">=</span><span class="token punctuation">{</span><span class="token boolean">true</span><span class="token punctuation">}</span> <span class="token operator">/</span><span class="token operator">></span><span class="token punctuation">;</span> <span class="token punctuation">}</span>
|
||
<span class="token punctuation">}</span><span class="token punctuation">,</span>
|
||
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