mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
Website Deployment Script
243 lines
66 KiB
HTML
243 lines
66 KiB
HTML
<!DOCTYPE html><html><head><title>SectionList</title><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><meta name="viewport" content="width=device-width"><meta property="fb:app_id" content="1677033832619985"><meta property="fb:admins" content="121800083"><meta property="og:site_name" content="React Native"><meta property="og:title" content="SectionList"><meta property="og:url" content="https://facebook.github.io/react-native/index.html"><meta property="og:image" content="https://facebook.github.io/react-native/img/opengraph.png"><meta property="og:description" content="A framework for building native apps using React"><meta name="twitter:site" content="@reactnative"><meta name="twitter:card" content="summary_large_image"><meta property="og:type" content="website"><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"><link rel="alternate" type="application/rss+xml" title="React Native Blog" href="https://facebook.github.io/react-native/blog/feed.xml"><link href="//cdn-images.mailchimp.com/embedcode/horizontal-slim-10_7.css" rel="stylesheet" type="text/css"><script type="text/javascript" src="//use.typekit.net/vqa1hcx.js"></script><script type="text/javascript">try{Typekit.load();}catch(e){}</script></head><body><script>window.fbAsyncInit = function() {FB.init({appId:'1677033832619985',xfbml:true,version:'v2.7'});};(function(d, s, id){var js, fjs = d.getElementsByTagName(s)[0];if (d.getElementById(id)) {return;}js = d.createElement(s); js.id = id;js.src = '//connect.facebook.net/en_US/sdk.js';fjs.parentNode.insertBefore(js, fjs);}(document, 'script','facebook-jssdk'));</script><script>window.twttr=(function(d,s, id){var js,fjs=d.getElementsByTagName(s)[0],t=window.twttr||{};if(d.getElementById(id))return t;js=d.createElement(s);js.id=id;js.src='https://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js, fjs);t._e = [];t.ready = function(f) {t._e.push(f);};return t;}(document, 'script', 'twitter-wjs'));</script><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">0.44</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="/react-native/support.html" class="">Help</a></li><li><a href="/react-native/showcase.html" class="">Showcase</a></li><li><a href="/react-native/blog/" class="">Blog</a></li></ul><div class="algolia-search-wrapper"><input id="algolia-doc-search" tabindex="0" 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>The Basics</h3><ul><li><a style="margin-left:10px;" class="" href="docs/getting-started.html">Getting Started</a></li><li><a style="margin-left:10px;" class="" href="docs/tutorial.html">Tutorial</a></li><li><a style="margin-left:10px;" class="" href="docs/props.html">Props</a></li><li><a style="margin-left:10px;" class="" href="docs/state.html">State</a></li><li><a style="margin-left:10px;" class="" href="docs/style.html">Style</a></li><li><a style="margin-left:10px;" class="" href="docs/height-and-width.html">Height and Width</a></li><li><a style="margin-left:10px;" class="" href="docs/flexbox.html">Layout with Flexbox</a></li><li><a style="margin-left:10px;" class="" href="docs/handling-text-input.html">Handling Text Input</a></li><li><a style="margin-left:10px;" class="" href="docs/using-a-scrollview.html">Using a ScrollView</a></li><li><a style="margin-left:10px;" class="" href="docs/using-a-listview.html">Using a ListView</a></li><li><a style="margin-left:10px;" class="" href="docs/network.html">Networking</a></li><li><a style="margin-left:10px;" class="" href="docs/more-resources.html">More Resources</a></li></ul></div><div class="nav-docs-section"><h3>Guides</h3><ul><li><a style="margin-left:10px;" class="" href="docs/handling-touches.html">Handling Touches</a></li><li><a style="margin-left:10px;" class="" href="docs/animations.html">Animations</a></li><li><a style="margin-left:10px;" class="" href="docs/navigation.html">Navigation</a></li><li><a style="margin-left:10px;" class="" href="docs/images.html">Images</a></li><li><a style="margin-left:10px;" class="" href="docs/colors.html">Colors</a></li><li><a style="margin-left:10px;" class="" href="docs/platform-specific-code.html">Platform Specific Code</a></li><li><a style="margin-left:10px;" class="" href="docs/debugging.html">Debugging</a></li><li><a style="margin-left:10px;" class="" href="docs/accessibility.html">Accessibility</a></li><li><a style="margin-left:10px;" class="" href="docs/timers.html">Timers</a></li><li><a style="margin-left:10px;" class="" href="docs/javascript-environment.html">JavaScript Environment</a></li><li><a style="margin-left:10px;" class="" href="docs/direct-manipulation.html">Direct Manipulation</a></li><li><a style="margin-left:10px;" class="" href="docs/performance.html">Performance</a></li><li><a style="margin-left:10px;" class="" href="docs/gesture-responder-system.html">Gesture Responder System</a></li><li><a style="margin-left:10px;" class="" href="docs/testing.html">Testing</a></li><li><a style="margin-left:10px;" class="" href="docs/understanding-cli.html">Understanding the CLI</a></li><li><a style="margin-left:10px;" class="" href="docs/integration-with-existing-apps.html">Integration With Existing Apps</a></li><li><a style="margin-left:10px;" class="" href="docs/running-on-device.html">Running On Device</a></li><li><a style="margin-left:10px;" class="" href="docs/upgrading.html">Upgrading</a></li></ul></div><div class="nav-docs-section"><h3>Guides (iOS)</h3><ul><li><a style="margin-left:10px;" class="" href="docs/native-modules-ios.html">Native Modules</a></li><li><a style="margin-left:10px;" class="" href="docs/native-components-ios.html">Native UI Components</a></li><li><a style="margin-left:10px;" class="" href="docs/linking-libraries-ios.html">Linking Libraries</a></li><li><a style="margin-left:10px;" class="" href="docs/running-on-simulator-ios.html">Running On Simulator</a></li><li><a style="margin-left:10px;" 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:10px;" class="" href="docs/native-modules-android.html">Native Modules</a></li><li><a style="margin-left:10px;" class="" href="docs/native-components-android.html">Native UI Components</a></li><li><a style="margin-left:10px;" class="" href="docs/headless-js-android.html">Headless JS</a></li><li><a style="margin-left:10px;" class="" href="docs/signed-apk-android.html">Generating Signed APK</a></li><li><a style="margin-left:10px;" 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:10px;" class="" href="docs/activityindicator.html">ActivityIndicator</a></li><li><a style="margin-left:10px;" class="" href="docs/button.html">Button</a></li><li><a style="margin-left:10px;" class="" href="docs/datepickerios.html">DatePickerIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/drawerlayoutandroid.html">DrawerLayoutAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/flatlist.html">FlatList</a></li><li><a style="margin-left:10px;" class="" href="docs/image.html">Image</a></li><li><a style="margin-left:10px;" class="" href="docs/keyboardavoidingview.html">KeyboardAvoidingView</a></li><li><a style="margin-left:10px;" class="" href="docs/listview.html">ListView</a></li><li><a style="margin-left:10px;" class="" href="docs/modal.html">Modal</a></li><li><a style="margin-left:10px;" class="" href="docs/navigatorios.html">NavigatorIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/picker.html">Picker</a></li><li><a style="margin-left:10px;" class="" href="docs/pickerios.html">PickerIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/progressbarandroid.html">ProgressBarAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/progressviewios.html">ProgressViewIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/refreshcontrol.html">RefreshControl</a></li><li><a style="margin-left:10px;" class="" href="docs/scrollview.html">ScrollView</a></li><li><a style="margin-left:10px;" class="active" href="docs/sectionlist.html">SectionList</a></li><li><a style="margin-left:10px;" class="" href="docs/segmentedcontrolios.html">SegmentedControlIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/slider.html">Slider</a></li><li><a style="margin-left:10px;" class="" href="docs/snapshotviewios.html">SnapshotViewIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/statusbar.html">StatusBar</a></li><li><a style="margin-left:10px;" class="" href="docs/switch.html">Switch</a></li><li><a style="margin-left:10px;" class="" href="docs/tabbarios.html">TabBarIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/tabbarios-item.html">TabBarIOS.Item</a></li><li><a style="margin-left:10px;" class="" href="docs/text.html">Text</a></li><li><a style="margin-left:10px;" class="" href="docs/textinput.html">TextInput</a></li><li><a style="margin-left:10px;" class="" href="docs/toolbarandroid.html">ToolbarAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/touchablehighlight.html">TouchableHighlight</a></li><li><a style="margin-left:10px;" class="" href="docs/touchablenativefeedback.html">TouchableNativeFeedback</a></li><li><a style="margin-left:10px;" class="" href="docs/touchableopacity.html">TouchableOpacity</a></li><li><a style="margin-left:10px;" class="" href="docs/touchablewithoutfeedback.html">TouchableWithoutFeedback</a></li><li><a style="margin-left:10px;" class="" href="docs/view.html">View</a></li><li><a style="margin-left:10px;" class="" href="docs/viewpagerandroid.html">ViewPagerAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/virtualizedlist.html">VirtualizedList</a></li><li><a style="margin-left:10px;" class="" href="docs/webview.html">WebView</a></li></ul></div><div class="nav-docs-section"><h3>APIs</h3><ul><li><a style="margin-left:10px;" class="" href="docs/accessibilityinfo.html">AccessibilityInfo</a></li><li><a style="margin-left:10px;" class="" href="docs/actionsheetios.html">ActionSheetIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/adsupportios.html">AdSupportIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/alert.html">Alert</a></li><li><a style="margin-left:10px;" class="" href="docs/alertios.html">AlertIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/animated.html">Animated</a></li><li><a style="margin-left:10px;" class="" href="docs/appregistry.html">AppRegistry</a></li><li><a style="margin-left:10px;" class="" href="docs/appstate.html">AppState</a></li><li><a style="margin-left:10px;" class="" href="docs/asyncstorage.html">AsyncStorage</a></li><li><a style="margin-left:10px;" class="" href="docs/backandroid.html">BackAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/backhandler.html">BackHandler</a></li><li><a style="margin-left:10px;" class="" href="docs/cameraroll.html">CameraRoll</a></li><li><a style="margin-left:10px;" class="" href="docs/clipboard.html">Clipboard</a></li><li><a style="margin-left:10px;" class="" href="docs/datepickerandroid.html">DatePickerAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/dimensions.html">Dimensions</a></li><li><a style="margin-left:10px;" class="" href="docs/easing.html">Easing</a></li><li><a style="margin-left:10px;" class="" href="docs/geolocation.html">Geolocation</a></li><li><a style="margin-left:10px;" class="" href="docs/imageeditor.html">ImageEditor</a></li><li><a style="margin-left:10px;" class="" href="docs/imagepickerios.html">ImagePickerIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/imagestore.html">ImageStore</a></li><li><a style="margin-left:10px;" class="" href="docs/interactionmanager.html">InteractionManager</a></li><li><a style="margin-left:10px;" class="" href="docs/keyboard.html">Keyboard</a></li><li><a style="margin-left:10px;" class="" href="docs/layoutanimation.html">LayoutAnimation</a></li><li><a style="margin-left:10px;" class="" href="docs/linking.html">Linking</a></li><li><a style="margin-left:10px;" class="" href="docs/nativemethodsmixin.html">NativeMethodsMixin</a></li><li><a style="margin-left:10px;" class="" href="docs/netinfo.html">NetInfo</a></li><li><a style="margin-left:10px;" class="" href="docs/panresponder.html">PanResponder</a></li><li><a style="margin-left:10px;" class="" href="docs/permissionsandroid.html">PermissionsAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/pixelratio.html">PixelRatio</a></li><li><a style="margin-left:10px;" class="" href="docs/pushnotificationios.html">PushNotificationIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/settings.html">Settings</a></li><li><a style="margin-left:10px;" class="" href="docs/share.html">Share</a></li><li><a style="margin-left:10px;" class="" href="docs/statusbarios.html">StatusBarIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/stylesheet.html">StyleSheet</a></li><li><a style="margin-left:10px;" class="" href="docs/systrace.html">Systrace</a></li><li><a style="margin-left:10px;" class="" href="docs/timepickerandroid.html">TimePickerAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/toastandroid.html">ToastAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/vibration.html">Vibration</a></li><li><a style="margin-left:10px;" class="" href="docs/vibrationios.html">VibrationIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/layout-props.html">Layout Props</a></li><li><a style="margin-left:10px;" class="" href="docs/shadow-props.html">Shadow Props</a></li></ul></div></div></div><div class="inner-content"><a id="content"></a><h1><a class="anchor" name="sectionlist"></a>SectionList <a class="hash-link" href="docs/sectionlist.html#sectionlist">#</a></h1><div><div><p>A performant interface for rendering sectioned lists, supporting the most handy features:</p><ul><li>Fully cross-platform.</li><li>Configurable viewability callbacks.</li><li>List header support.</li><li>List footer support.</li><li>Item separator support.</li><li>Section header support.</li><li>Section separator support.</li><li>Heterogeneous data and item rendering support.</li><li>Pull to Refresh.</li><li>Scroll loading.</li></ul><p>If you don't need section support and want a simpler interface, use
|
||
<a href="/react-native/docs/flatlist.html" target=""><code><FlatList></code></a>.</p><p>If you need <em>sticky</em> section header support, use <code>ListView</code> for now.</p><p>Simple Examples:</p><div class="prism language-javascript"><SectionList
|
||
renderItem<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">(</span><span class="token punctuation">{</span>item<span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> <ListItem title<span class="token operator">=</span><span class="token punctuation">{</span>item<span class="token punctuation">.</span>title<span class="token punctuation">}</span><span class="token punctuation">}</span>
|
||
renderSectionHeader<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">(</span><span class="token punctuation">{</span>section<span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> <H1 title<span class="token operator">=</span><span class="token punctuation">{</span>section<span class="token punctuation">.</span>key<span class="token punctuation">}</span> <span class="token operator">/</span><span class="token operator">></span><span class="token punctuation">}</span>
|
||
sections<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">[</span><span class="token comment" spellcheck="true"> // homogenous rendering between sections
|
||
</span> <span class="token punctuation">{</span>data<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><span class="token punctuation">]</span><span class="token punctuation">,</span> key<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><span class="token punctuation">,</span>
|
||
<span class="token punctuation">{</span>data<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><span class="token punctuation">]</span><span class="token punctuation">,</span> key<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><span class="token punctuation">,</span>
|
||
<span class="token punctuation">{</span>data<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><span class="token punctuation">]</span><span class="token punctuation">,</span> key<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><span class="token punctuation">,</span>
|
||
<span class="token punctuation">]</span><span class="token punctuation">}</span>
|
||
<span class="token operator">/</span><span class="token operator">></span>
|
||
|
||
<SectionList
|
||
sections<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">[</span><span class="token comment" spellcheck="true"> // heterogeneous rendering between sections
|
||
</span> <span class="token punctuation">{</span>data<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><span class="token punctuation">]</span><span class="token punctuation">,</span> key<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> renderItem<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><span class="token punctuation">,</span>
|
||
<span class="token punctuation">{</span>data<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><span class="token punctuation">]</span><span class="token punctuation">,</span> key<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> renderItem<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><span class="token punctuation">,</span>
|
||
<span class="token punctuation">{</span>data<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><span class="token punctuation">]</span><span class="token punctuation">,</span> key<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> renderItem<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><span class="token punctuation">,</span>
|
||
<span class="token punctuation">]</span><span class="token punctuation">}</span>
|
||
<span class="token operator">/</span><span class="token operator">></span></div><p>This is a convenience wrapper around <a href="/react-native/docs/virtualizedlist.html" target=""><code><VirtualizedList></code></a>,
|
||
and thus inherits the following caveats:</p><ul><li>Internal state is not preserved when content scrolls out of the render window. Make sure all
|
||
your data is captured in the item data or external stores like Flux, Redux, or Relay.</li><li>This is a <code>PureComponent</code> which means that it will not re-render if <code>props</code> remain shallow-
|
||
equal. Make sure that everything your <code>renderItem</code> function depends on is passed as a prop that
|
||
is not <code>===</code> after updates, otherwise your UI may not update on changes. This includes the
|
||
<code>data</code> prop and parent component state.</li><li>In order to constrain memory and enable smooth scrolling, content is rendered asynchronously
|
||
offscreen. This means it's possible to scroll faster than the fill rate ands momentarily see
|
||
blank content. This is a tradeoff that can be adjusted to suit the needs of each application,
|
||
and we are working on improving it behind the scenes.</li><li>By default, the list looks for a <code>key</code> prop on each item and uses that for the React key.
|
||
Alternatively, you can provide a custom <code>keyExtractor</code> prop.</li></ul></div><h3><a class="anchor" name="props"></a>Props <a class="hash-link" href="docs/sectionlist.html#props">#</a></h3><div class="props"><div class="prop"><h4 class="propTitle"><a class="anchor" name="itemseparatorcomponent"></a>ItemSeparatorComponent?: <span class="propType"><span>?ReactClass<any></span></span> <a class="hash-link" href="docs/sectionlist.html#itemseparatorcomponent">#</a></h4><div><p>Rendered in between adjacent Items within each section.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="listfootercomponent"></a>ListFooterComponent?: <span class="propType"><span>?ReactClass<any></span></span> <a class="hash-link" href="docs/sectionlist.html#listfootercomponent">#</a></h4><div><p>Rendered at the very end of the list.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="listheadercomponent"></a>ListHeaderComponent?: <span class="propType"><span>?ReactClass<any></span></span> <a class="hash-link" href="docs/sectionlist.html#listheadercomponent">#</a></h4><div><p>Rendered at the very beginning of the list.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="sectionseparatorcomponent"></a>SectionSeparatorComponent?: <span class="propType"><span>?ReactClass<any></span></span> <a class="hash-link" href="docs/sectionlist.html#sectionseparatorcomponent">#</a></h4><div><p>Rendered in between each section.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="extradata"></a>extraData?: <span class="propType">any</span> <a class="hash-link" href="docs/sectionlist.html#extradata">#</a></h4><div><p>A marker property for telling the list to re-render (since it implements <code>PureComponent</code>). If
|
||
any of your <code>renderItem</code>, Header, Footer, etc. functions depend on anything outside of the
|
||
<code>data</code> prop, stick it here and treat it immutably.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="initialnumtorender"></a>initialNumToRender: <span class="propType">number</span> <a class="hash-link" href="docs/sectionlist.html#initialnumtorender">#</a></h4><div><p>How many items to render in the initial batch. This should be enough to fill the screen but not
|
||
much more. Note these items will never be unmounted as part of the windowed rendering in order
|
||
to improve perceived performance of scroll-to-top actions.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="keyextractor"></a>keyExtractor: <span class="propType">(item: Item, index: number) => string</span> <a class="hash-link" href="docs/sectionlist.html#keyextractor">#</a></h4><div><p>Used to extract a unique key for a given item at the specified index. Key is used for caching
|
||
and as the react key to track item re-ordering. The default extractor checks item.key, then
|
||
falls back to using the index, like react does.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="onendreached"></a>onEndReached?: <span class="propType"><span>?(info: {distanceFromEnd: number}) => void</span></span> <a class="hash-link" href="docs/sectionlist.html#onendreached">#</a></h4><div><p>Called once when the scroll position gets within <code>onEndReachedThreshold</code> of the rendered
|
||
content.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="onendreachedthreshold"></a>onEndReachedThreshold?: <span class="propType"><span>?number</span></span> <a class="hash-link" href="docs/sectionlist.html#onendreachedthreshold">#</a></h4><div><p>How far from the end (in units of visible length of the list) the bottom edge of the
|
||
list must be from the end of the content to trigger the <code>onEndReached</code> callback.
|
||
Thus a value of 0.5 will trigger <code>onEndReached</code> when the end of the content is
|
||
within half the visible length of the list.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="onrefresh"></a>onRefresh?: <span class="propType"><span>?() => void</span></span> <a class="hash-link" href="docs/sectionlist.html#onrefresh">#</a></h4><div><p>If provided, a standard RefreshControl will be added for "Pull to Refresh" functionality. Make
|
||
sure to also set the <code>refreshing</code> prop correctly.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="onviewableitemschanged"></a>onViewableItemsChanged?: <span class="propType"><span>?(info: {
|
||
viewableItems: Array<ViewToken>,
|
||
changed: Array<ViewToken>,
|
||
}) => void</span></span> <a class="hash-link" href="docs/sectionlist.html#onviewableitemschanged">#</a></h4><div><p>Called when the viewability of rows changes, as defined by the
|
||
<code>viewabilityConfig</code> prop.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="refreshing"></a>refreshing?: <span class="propType"><span>?boolean</span></span> <a class="hash-link" href="docs/sectionlist.html#refreshing">#</a></h4><div><p>Set this true while waiting for new data from a refresh.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="renderitem"></a>renderItem: <span class="propType">(info: {item: Item, index: number}) => ?React.Element<any></span> <a class="hash-link" href="docs/sectionlist.html#renderitem">#</a></h4><div><p>Default renderer for every item in every section. Can be over-ridden on a per-section basis.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="rendersectionheader"></a>renderSectionHeader?: <span class="propType"><span>?(info: {section: SectionT}) => ?React.Element<any></span></span> <a class="hash-link" href="docs/sectionlist.html#rendersectionheader">#</a></h4><div><p>Rendered at the top of each section. Sticky headers are not yet supported.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="sections"></a>sections: <span class="propType">Array<SectionT></span> <a class="hash-link" href="docs/sectionlist.html#sections">#</a></h4></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="stickysectionheadersenabled"></a>stickySectionHeadersEnabled?: <span class="propType">boolean</span> <a class="hash-link" href="docs/sectionlist.html#stickysectionheadersenabled">#</a></h4><div><p>Makes section headers stick to the top of the screen until the next one pushes it off. Only
|
||
enabled by default on iOS because that is the platform standard there.</p></div></div></div></div><p class="edit-page-block">You can <a target="_blank" href="https://github.com/facebook/react-native/blob/master/Libraries/Lists/SectionList.js">edit the content above on GitHub</a> and send us a pull request!</p><div><div><table width="100%"><tbody><tr><td><h3><a class="anchor" name="examples"></a>Examples <a class="hash-link" href="docs/sectionlist.html#examples">#</a></h3></td><td style="text-align:right;"><a target="_blank" href="https://github.com/facebook/react-native/blob/master/Examples/UIExplorer/js/SectionListExample.js">Edit on GitHub</a></td></tr></tbody></table><div class="example-container"><div class="prism language-javascript"><span class="token string">'use strict'</span><span class="token punctuation">;</span>
|
||
|
||
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>
|
||
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>
|
||
const <span class="token punctuation">{</span>
|
||
Animated<span class="token punctuation">,</span>
|
||
SectionList<span class="token punctuation">,</span>
|
||
StyleSheet<span class="token punctuation">,</span>
|
||
Text<span class="token punctuation">,</span>
|
||
View<span class="token punctuation">,</span>
|
||
<span class="token punctuation">}</span> <span class="token operator">=</span> ReactNative<span class="token punctuation">;</span>
|
||
|
||
const UIExplorerPage <span class="token operator">=</span> <span class="token function">require<span class="token punctuation">(</span></span><span class="token string">'./UIExplorerPage'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
||
|
||
const infoLog <span class="token operator">=</span> <span class="token function">require<span class="token punctuation">(</span></span><span class="token string">'infoLog'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
||
|
||
const <span class="token punctuation">{</span>
|
||
HeaderComponent<span class="token punctuation">,</span>
|
||
FooterComponent<span class="token punctuation">,</span>
|
||
ItemComponent<span class="token punctuation">,</span>
|
||
PlainInput<span class="token punctuation">,</span>
|
||
SeparatorComponent<span class="token punctuation">,</span>
|
||
Spindicator<span class="token punctuation">,</span>
|
||
genItemData<span class="token punctuation">,</span>
|
||
pressItem<span class="token punctuation">,</span>
|
||
renderSmallSwitchOption<span class="token punctuation">,</span>
|
||
renderStackedItem<span class="token punctuation">,</span>
|
||
<span class="token punctuation">}</span> <span class="token operator">=</span> <span class="token function">require<span class="token punctuation">(</span></span><span class="token string">'./ListExampleShared'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
||
|
||
const AnimatedSectionList <span class="token operator">=</span> Animated<span class="token punctuation">.</span><span class="token function">createAnimatedComponent<span class="token punctuation">(</span></span>SectionList<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
||
|
||
const VIEWABILITY_CONFIG <span class="token operator">=</span> <span class="token punctuation">{</span>
|
||
minimumViewTime<span class="token punctuation">:</span> <span class="token number">3000</span><span class="token punctuation">,</span>
|
||
viewAreaCoveragePercentThreshold<span class="token punctuation">:</span> <span class="token number">100</span><span class="token punctuation">,</span>
|
||
waitForInteraction<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
|
||
<span class="token punctuation">}</span><span class="token punctuation">;</span>
|
||
|
||
const renderSectionHeader <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">{</span>section<span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">(</span>
|
||
<View<span class="token operator">></span>
|
||
<Text style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>headerText<span class="token punctuation">}</span><span class="token operator">></span>SECTION HEADER<span class="token punctuation">:</span> <span class="token punctuation">{</span>section<span class="token punctuation">.</span>key<span class="token punctuation">}</span><<span class="token operator">/</span>Text<span class="token operator">></span>
|
||
<SeparatorComponent <span class="token operator">/</span><span class="token operator">></span>
|
||
<<span class="token operator">/</span>View<span class="token operator">></span>
|
||
<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
||
|
||
const CustomSeparatorComponent <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">{</span>text<span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">(</span>
|
||
<View<span class="token operator">></span>
|
||
<SeparatorComponent <span class="token operator">/</span><span class="token operator">></span>
|
||
<Text style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>separatorText<span class="token punctuation">}</span><span class="token operator">></span><span class="token punctuation">{</span>text<span class="token punctuation">}</span><<span class="token operator">/</span>Text<span class="token operator">></span>
|
||
<SeparatorComponent <span class="token operator">/</span><span class="token operator">></span>
|
||
<<span class="token operator">/</span>View<span class="token operator">></span>
|
||
<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
||
|
||
class <span class="token class-name">SectionListExample</span> extends <span class="token class-name">React<span class="token punctuation">.</span>PureComponent</span> <span class="token punctuation">{</span>
|
||
static title <span class="token operator">=</span> <span class="token string">'<SectionList>'</span><span class="token punctuation">;</span>
|
||
static description <span class="token operator">=</span> <span class="token string">'Performant, scrollable list of data.'</span><span class="token punctuation">;</span>
|
||
|
||
state <span class="token operator">=</span> <span class="token punctuation">{</span>
|
||
data<span class="token punctuation">:</span> <span class="token function">genItemData<span class="token punctuation">(</span></span><span class="token number">1000</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
|
||
debug<span class="token punctuation">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
|
||
filterText<span class="token punctuation">:</span> <span class="token string">''</span><span class="token punctuation">,</span>
|
||
logViewable<span class="token punctuation">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
|
||
virtualized<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
|
||
<span class="token punctuation">}</span><span class="token punctuation">;</span>
|
||
|
||
_scrollPos <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">Animated<span class="token punctuation">.</span>Value</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
||
_scrollSinkY <span class="token operator">=</span> Animated<span class="token punctuation">.</span><span class="token function">event<span class="token punctuation">(</span></span>
|
||
<span class="token punctuation">[</span><span class="token punctuation">{</span>nativeEvent<span class="token punctuation">:</span> <span class="token punctuation">{</span> contentOffset<span class="token punctuation">:</span> <span class="token punctuation">{</span> y<span class="token punctuation">:</span> <span class="token keyword">this</span><span class="token punctuation">.</span>_scrollPos <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>
|
||
<span class="token punctuation">{</span>useNativeDriver<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
|
||
<span class="token punctuation">)</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>
|
||
const filterRegex <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">RegExp</span><span class="token punctuation">(</span><span class="token function">String<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">.</span>state<span class="token punctuation">.</span>filterText<span class="token punctuation">)</span><span class="token punctuation">,</span> <span class="token string">'i'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
|
||
const filter <span class="token operator">=</span> <span class="token punctuation">(</span>item<span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">(</span>
|
||
filterRegex<span class="token punctuation">.</span><span class="token function">test<span class="token punctuation">(</span></span>item<span class="token punctuation">.</span>text<span class="token punctuation">)</span> <span class="token operator">||</span> filterRegex<span class="token punctuation">.</span><span class="token function">test<span class="token punctuation">(</span></span>item<span class="token punctuation">.</span>title<span class="token punctuation">)</span>
|
||
<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
||
const filteredData <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>state<span class="token punctuation">.</span>data<span class="token punctuation">.</span><span class="token function">filter<span class="token punctuation">(</span></span>filter<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
||
const filteredSectionData <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">;</span>
|
||
<span class="token keyword">let</span> startIndex <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>
|
||
const endIndex <span class="token operator">=</span> filteredData<span class="token punctuation">.</span>length <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">;</span>
|
||
<span class="token keyword">for</span> <span class="token punctuation">(</span><span class="token keyword">let</span> ii <span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">;</span> ii <<span class="token operator">=</span> endIndex <span class="token operator">+</span> <span class="token number">10</span><span class="token punctuation">;</span> ii <span class="token operator">+</span><span class="token operator">=</span> <span class="token number">10</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
||
filteredSectionData<span class="token punctuation">.</span><span class="token function">push<span class="token punctuation">(</span></span><span class="token punctuation">{</span>
|
||
key<span class="token punctuation">:</span> `$<span class="token punctuation">{</span>filteredData<span class="token punctuation">[</span>startIndex<span class="token punctuation">]</span><span class="token punctuation">.</span>key<span class="token punctuation">}</span> <span class="token operator">-</span> $<span class="token punctuation">{</span>filteredData<span class="token punctuation">[</span>Math<span class="token punctuation">.</span><span class="token function">min<span class="token punctuation">(</span></span>ii <span class="token operator">-</span> <span class="token number">1</span><span class="token punctuation">,</span> endIndex<span class="token punctuation">)</span><span class="token punctuation">]</span><span class="token punctuation">.</span>key<span class="token punctuation">}</span>`<span class="token punctuation">,</span>
|
||
data<span class="token punctuation">:</span> filteredData<span class="token punctuation">.</span><span class="token function">slice<span class="token punctuation">(</span></span>startIndex<span class="token punctuation">,</span> ii<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>
|
||
startIndex <span class="token operator">=</span> ii<span class="token punctuation">;</span>
|
||
<span class="token punctuation">}</span>
|
||
<span class="token keyword">return</span> <span class="token punctuation">(</span>
|
||
<UIExplorerPage
|
||
noSpacer<span class="token operator">=</span><span class="token punctuation">{</span><span class="token boolean">true</span><span class="token punctuation">}</span>
|
||
noScroll<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>
|
||
<View style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>searchRow<span class="token punctuation">}</span><span class="token operator">></span>
|
||
<PlainInput
|
||
onChangeText<span class="token operator">=</span><span class="token punctuation">{</span>filterText <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">{</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><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>filterText<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><span class="token punctuation">}</span>
|
||
placeholder<span class="token operator">=</span><span class="token string">"Search..."</span>
|
||
value<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>filterText<span class="token punctuation">}</span>
|
||
<span class="token operator">/</span><span class="token operator">></span>
|
||
<View style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>optionSection<span class="token punctuation">}</span><span class="token operator">></span>
|
||
<span class="token punctuation">{</span><span class="token function">renderSmallSwitchOption<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">,</span> <span class="token string">'virtualized'</span><span class="token punctuation">)</span><span class="token punctuation">}</span>
|
||
<span class="token punctuation">{</span><span class="token function">renderSmallSwitchOption<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">,</span> <span class="token string">'logViewable'</span><span class="token punctuation">)</span><span class="token punctuation">}</span>
|
||
<span class="token punctuation">{</span><span class="token function">renderSmallSwitchOption<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">,</span> <span class="token string">'debug'</span><span class="token punctuation">)</span><span class="token punctuation">}</span>
|
||
<Spindicator value<span class="token operator">=</span><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>_scrollPos<span class="token punctuation">}</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<<span class="token operator">/</span>View<span class="token operator">></span>
|
||
<<span class="token operator">/</span>View<span class="token operator">></span>
|
||
<SeparatorComponent <span class="token operator">/</span><span class="token operator">></span>
|
||
<AnimatedSectionList
|
||
ListHeaderComponent<span class="token operator">=</span><span class="token punctuation">{</span>HeaderComponent<span class="token punctuation">}</span>
|
||
ListFooterComponent<span class="token operator">=</span><span class="token punctuation">{</span>FooterComponent<span class="token punctuation">}</span>
|
||
SectionSeparatorComponent<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span>
|
||
<CustomSeparatorComponent text<span class="token operator">=</span><span class="token string">"SECTION SEPARATOR"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<span class="token punctuation">}</span>
|
||
ItemSeparatorComponent<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span>
|
||
<CustomSeparatorComponent text<span class="token operator">=</span><span class="token string">"ITEM SEPARATOR"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<span class="token punctuation">}</span>
|
||
debug<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>debug<span class="token punctuation">}</span>
|
||
enableVirtualization<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>virtualized<span class="token punctuation">}</span>
|
||
onRefresh<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token function">alert<span class="token punctuation">(</span></span><span class="token string">'onRefresh: nothing to refresh :P'</span><span class="token punctuation">)</span><span class="token punctuation">}</span>
|
||
onScroll<span class="token operator">=</span><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>_scrollSinkY<span class="token punctuation">}</span>
|
||
onViewableItemsChanged<span class="token operator">=</span><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>_onViewableItemsChanged<span class="token punctuation">}</span>
|
||
refreshing<span class="token operator">=</span><span class="token punctuation">{</span><span class="token boolean">false</span><span class="token punctuation">}</span>
|
||
renderItem<span class="token operator">=</span><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>_renderItemComponent<span class="token punctuation">}</span>
|
||
renderSectionHeader<span class="token operator">=</span><span class="token punctuation">{</span>renderSectionHeader<span class="token punctuation">}</span>
|
||
sections<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">[</span>
|
||
<span class="token punctuation">{</span>renderItem<span class="token punctuation">:</span> renderStackedItem<span class="token punctuation">,</span> key<span class="token punctuation">:</span> <span class="token string">'s1'</span><span class="token punctuation">,</span> data<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">'Item In Header Section'</span><span class="token punctuation">,</span> text<span class="token punctuation">:</span> <span class="token string">'Section s1'</span><span class="token punctuation">,</span> key<span class="token punctuation">:</span> <span class="token string">'0'</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>
|
||
<span class="token punctuation">{</span>key<span class="token punctuation">:</span> <span class="token string">'s2'</span><span class="token punctuation">,</span> data<span class="token punctuation">:</span> <span class="token punctuation">[</span>
|
||
<span class="token punctuation">{</span>noImage<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span> title<span class="token punctuation">:</span> <span class="token string">'1st item'</span><span class="token punctuation">,</span> text<span class="token punctuation">:</span> <span class="token string">'Section s2'</span><span class="token punctuation">,</span> key<span class="token punctuation">:</span> <span class="token string">'0'</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
|
||
<span class="token punctuation">{</span>noImage<span class="token punctuation">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span> title<span class="token punctuation">:</span> <span class="token string">'2nd item'</span><span class="token punctuation">,</span> text<span class="token punctuation">:</span> <span class="token string">'Section s2'</span><span class="token punctuation">,</span> key<span class="token punctuation">:</span> <span class="token string">'1'</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>
|
||
<span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span>filteredSectionData<span class="token punctuation">,</span>
|
||
<span class="token punctuation">]</span><span class="token punctuation">}</span>
|
||
viewabilityConfig<span class="token operator">=</span><span class="token punctuation">{</span>VIEWABILITY_CONFIG<span class="token punctuation">}</span>
|
||
<span class="token operator">/</span><span class="token operator">></span>
|
||
<<span class="token operator">/</span>UIExplorerPage<span class="token operator">></span>
|
||
<span class="token punctuation">)</span><span class="token punctuation">;</span>
|
||
<span class="token punctuation">}</span>
|
||
_renderItemComponent <span class="token operator">=</span> <span class="token punctuation">(</span><span class="token punctuation">{</span>item<span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">(</span>
|
||
<ItemComponent item<span class="token operator">=</span><span class="token punctuation">{</span>item<span class="token punctuation">}</span> onPress<span class="token operator">=</span><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>_pressItem<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 comment" spellcheck="true"> // This is called when items change viewability by scrolling into our out of
|
||
</span> <span class="token comment" spellcheck="true"> // the viewable area.
|
||
</span> _onViewableItemsChanged <span class="token operator">=</span> <span class="token punctuation">(</span>info<span class="token punctuation">:</span> <span class="token punctuation">{</span>
|
||
changed<span class="token punctuation">:</span> Array<<span class="token punctuation">{</span>
|
||
key<span class="token punctuation">:</span> string<span class="token punctuation">,</span>
|
||
isViewable<span class="token punctuation">:</span> boolean<span class="token punctuation">,</span>
|
||
item<span class="token punctuation">:</span> <span class="token punctuation">{</span>columns<span class="token punctuation">:</span> Array<<span class="token operator">*</span><span class="token operator">></span><span class="token punctuation">}</span><span class="token punctuation">,</span>
|
||
index<span class="token punctuation">:</span> <span class="token operator">?</span>number<span class="token punctuation">,</span>
|
||
section<span class="token operator">?</span><span class="token punctuation">:</span> any
|
||
<span class="token punctuation">}</span><span class="token operator">></span><span class="token punctuation">}</span><span class="token punctuation">,</span>
|
||
<span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">{</span>
|
||
<span class="token comment" spellcheck="true"> // Impressions can be logged here
|
||
</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span>state<span class="token punctuation">.</span>logViewable<span class="token punctuation">)</span> <span class="token punctuation">{</span>
|
||
<span class="token function">infoLog<span class="token punctuation">(</span></span><span class="token string">'onViewableItemsChanged: '</span><span class="token punctuation">,</span> info<span class="token punctuation">.</span>changed<span class="token punctuation">.</span><span class="token function">map<span class="token punctuation">(</span></span><span class="token punctuation">(</span>v<span class="token punctuation">:</span> Object<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>v<span class="token punctuation">,</span> item<span class="token punctuation">:</span> <span class="token string">'...'</span><span class="token punctuation">,</span> section<span class="token punctuation">:</span> v<span class="token punctuation">.</span>section<span class="token punctuation">.</span>key<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>
|
||
<span class="token punctuation">}</span>
|
||
<span class="token punctuation">}</span><span class="token punctuation">;</span>
|
||
_pressItem <span class="token operator">=</span> <span class="token punctuation">(</span>index<span class="token punctuation">:</span> number<span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">{</span>
|
||
<span class="token function">pressItem<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">,</span> index<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>
|
||
|
||
const 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>
|
||
headerText<span class="token punctuation">:</span> <span class="token punctuation">{</span>
|
||
padding<span class="token punctuation">:</span> <span class="token number">4</span><span class="token punctuation">,</span>
|
||
<span class="token punctuation">}</span><span class="token punctuation">,</span>
|
||
optionSection<span class="token punctuation">:</span> <span class="token punctuation">{</span>
|
||
flexDirection<span class="token punctuation">:</span> <span class="token string">'row'</span><span class="token punctuation">,</span>
|
||
<span class="token punctuation">}</span><span class="token punctuation">,</span>
|
||
searchRow<span class="token punctuation">:</span> <span class="token punctuation">{</span>
|
||
paddingHorizontal<span class="token punctuation">:</span> <span class="token number">10</span><span class="token punctuation">,</span>
|
||
<span class="token punctuation">}</span><span class="token punctuation">,</span>
|
||
separatorText<span class="token punctuation">:</span> <span class="token punctuation">{</span>
|
||
color<span class="token punctuation">:</span> <span class="token string">'gray'</span><span class="token punctuation">,</span>
|
||
alignSelf<span class="token punctuation">:</span> <span class="token string">'center'</span><span class="token punctuation">,</span>
|
||
padding<span class="token punctuation">:</span> <span class="token number">4</span><span class="token punctuation">,</span>
|
||
fontSize<span class="token punctuation">:</span> <span class="token number">9</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><span class="token punctuation">;</span>
|
||
|
||
module<span class="token punctuation">.</span>exports <span class="token operator">=</span> SectionListExample<span class="token punctuation">;</span></div><div class="embedded-simulator"><p><a class="modal-button-open"><strong>Run this example</strong></a></p><div class="modal-button-open modal-button-open-img"><img alt="Run example in simulator" width="170" height="356" src="img/uiexplorer_main_ios.png"></div><div><div class="modal"><div class="modal-content"><button class="modal-button-close">×</button><div class="center"><iframe class="simulator" src="https://appetize.io/embed/7vdfm9h3e6vuf4gfdm7r5rgc48?device=iphone6s&scale=60&autoplay=false&orientation=portrait&deviceColor=white&params=%7B%22route%22%3A%22SectionList%22%7D" width="256" height="550" scrolling="no"></iframe><p>Powered by <a target="_blank" href="https://appetize.io">appetize.io</a></p></div></div></div><div class="modal-backdrop"></div></div></div></div></div></div><div class="docs-prevnext"><a class="docs-prev" href="docs/scrollview.html#content">← Prev</a><a class="docs-next" href="docs/segmentedcontrolios.html#content">Next →</a></div></div></section><footer class="nav-footer"><section class="sitemap"><a href="/react-native" class="nav-home"><img src="img/header_logo.png" alt="React Native" width="66" height="58"></a><div><h5><a href="docs/">Docs</a></h5><a href="docs/getting-started.html">Getting Started</a><a href="docs/tutorial.html">Tutorial</a><a href="docs/integration-with-existing-apps.html">Integration With Existing Apps</a><a href="docs/more-resources.html">More Resources</a></div><div><h5><a href="/react-native/support.html">Community</a></h5><a href="/react-native/showcase.html">Showcase</a><a href="http://www.meetup.com/topics/react-native/" target="_blank">Upcoming Events</a><a href="https://www.facebook.com/groups/react.native.community" target="_blank">Facebook Group</a><a href="https://twitter.com/reactnative" target="_blank">Twitter</a></div><div><h5><a href="/react-native/support.html">Help</a></h5><a href="http://stackoverflow.com/questions/tagged/react-native" target="_blank">Stack Overflow</a><a href="https://discord.gg/0ZcbPKXt5bZjGY5n">Reactiflux Chat</a><a href="/react-native/versions.html" target="_blank">Latest Releases</a><a href="https://react-native.canny.io/feature-requests" target="_blank">Feature Requests</a></div><div><h5>More</h5><a href="/react-native/blog">Blog</a><a href="https://github.com/facebook/react-native" target="_blank">GitHub</a><a href="http://facebook.github.io/react/" target="_blank">React</a></div></section><section class="newsletter"><div id="mc_embed_signup"><form action="//reactnative.us10.list-manage.com/subscribe/post?u=db0dd948e2b729ee62625b1a8&id=47cd41008f" method="post" id="mc-embedded-subscribe-form" name="mc-embedded-subscribe-form" class="validate" target="_blank" novalidate><div id="mc_embed_signup_scroll"><label for="mce-EMAIL"><h5>Get the React Native Newsletter</h5></label><input type="email" value="" name="EMAIL" class="email" id="mce-EMAIL" placeholder="email address" required><div style="position:absolute;left:-5000px;" aria-hidden="true"><input type="text" name="b_db0dd948e2b729ee62625b1a8_47cd41008f" tabindex="-1" value=""></div><div class="clear"><input type="submit" value="Sign up" name="subscribe" id="mc-embedded-subscribe" class="button"></div></div></form></div></section><a href="https://code.facebook.com/projects/" target="_blank" class="fbOpenSource"><img src="img/oss_logo.png" alt="Facebook Open Source" width="170" height="45"></a><section class="copyright">Copyright © 2017 Facebook Inc.</section></footer></div><div id="fb-root"></div><script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script><script>
|
||
(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){
|
||
(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
|
||
m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
|
||
})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
|
||
ga('create', 'UA-41298772-2', 'facebook.github.io');
|
||
ga('send', 'pageview');
|
||
|
||
!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0];if(!d.getElementById(id)
|
||
){js=d.createElement(s);js.id=id;js.src="https://platform.twitter.com/widgets.js";
|
||
fjs.parentNode.insertBefore(js,fjs);}}(document,"script","twitter-wjs");
|
||
|
||
docsearch({
|
||
apiKey: '2c98749b4a1e588efec53b2acec13025',
|
||
indexName: 'react-native-versions',
|
||
inputSelector: '#algolia-doc-search',
|
||
algoliaOptions: { facetFilters: [ "tags:0.44" ], hitsPerPage: 5 }
|
||
});
|
||
</script><script src="js/scripts.js"></script><script type="text/javascript" src="//s3.amazonaws.com/downloads.mailchimp.com/js/mc-validate.js"></script><script type="text/javascript">(function($) {window.fnames = new Array(); window.ftypes = new Array();fnames[0]='EMAIL';ftypes[0]='email';fnames[1]='FNAME';ftypes[1]='text';fnames[2]='LNAME';ftypes[2]='text';}(jQuery));var $mcj = jQuery.noConflict(true);</script></body></html> |