mirror of
https://github.com/facebook/react-native.git
synced 2025-11-01 09:14:26 +00:00
47 lines
46 KiB
HTML
47 lines
46 KiB
HTML
<!doctype html>
|
|
<html lang="en">
|
|
<head>
|
|
<meta charset="UTF-8">
|
|
<meta name="viewport" content="width=device-width,initial-scale=1">
|
|
<meta name="generator" content="Docusaurus v2.0.0-alpha.66">
|
|
<link rel="alternate" type="application/rss+xml" href="/blog/rss.xml" title="React Native Blog RSS Feed">
|
|
<link rel="alternate" type="application/atom+xml" href="/blog/atom.xml" title="React Native Blog Atom Feed">
|
|
<link rel="preconnect" href="https://www.google-analytics.com">
|
|
<script>window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)},ga.l=+new Date,ga("create","UA-41298772-2","auto"),ga("send","pageview")</script>
|
|
<script async src="https://www.google-analytics.com/analytics.js"></script>
|
|
<link rel="preconnect" href="https://www.google-analytics.com">
|
|
<link rel="preconnect" href="https://www.googletagmanager.com">
|
|
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-41298772-2"></script>
|
|
<script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","UA-41298772-2",{})</script>
|
|
<link rel="search" type="application/opensearchdescription+xml" title="React Native" href="/opensearch.xml">
|
|
<script src="https://cdn.jsdelivr.net/npm/focus-visible@5.2.0/dist/focus-visible.min.js" defer="defer"></script>
|
|
<script src="https://snack.expo.io/embed.js" defer="defer"></script><title data-react-helmet="true">PanResponder · React Native</title><meta data-react-helmet="true" property="twitter:image" content="https://reactnative.dev/img/logo-og.png"><meta data-react-helmet="true" name="twitter:image:alt" content="Image for React Native"><meta data-react-helmet="true" name="docsearch:language" content="en"><meta data-react-helmet="true" name="docsearch:version" content="0.63"><meta data-react-helmet="true" name="docsearch:docusaurus_tag" content="docs-default-0.63"><meta data-react-helmet="true" property="og:image" content="https://reactnative.dev/img/logo-og.png"><meta data-react-helmet="true" name="twitter:card" content="summary"><meta data-react-helmet="true" name="twitter:image" content="https://reactnative.dev/img/logo-og.png"><meta data-react-helmet="true" property="og:title" content="PanResponder · React Native"><meta data-react-helmet="true" name="description" content="PanResponder reconciles several touches into a single gesture. It makes single-touch gestures resilient to extra touches, and can be used to recognize basic multi-touch gestures."><meta data-react-helmet="true" property="og:description" content="PanResponder reconciles several touches into a single gesture. It makes single-touch gestures resilient to extra touches, and can be used to recognize basic multi-touch gestures."><meta data-react-helmet="true" property="og:url" content="https://reactnative.dev/docs/panresponder"><link data-react-helmet="true" rel="shortcut icon" href="/img/favicon.ico"><link data-react-helmet="true" rel="preconnect" href="https://BH4D9OD16A-dsn.algolia.net" crossorigin="anonymous"><link data-react-helmet="true" rel="canonical" href="https://reactnative.dev/docs/panresponder"><link rel="stylesheet" href="/styles.fccefeba.css">
|
|
<link rel="stylesheet" href="/main.ca40cabd.css">
|
|
<link rel="preload" href="/styles.07d522c6.js" as="script">
|
|
<link rel="preload" href="/runtime~main.56c3f166.js" as="script">
|
|
<link rel="preload" href="/main.5a3c9855.js" as="script">
|
|
<link rel="preload" href="/1.ba9ce8bd.js" as="script">
|
|
<link rel="preload" href="/2.58cb5d3d.js" as="script">
|
|
<link rel="preload" href="/1f391b9e.a824c215.js" as="script">
|
|
<link rel="preload" href="/943.8b024446.js" as="script">
|
|
<link rel="preload" href="/ee5b3385.b4fff665.js" as="script">
|
|
<link rel="preload" href="/17896441.0c201679.js" as="script">
|
|
<link rel="preload" href="/aaec36e1.324c2ef9.js" as="script">
|
|
</head>
|
|
<body>
|
|
<script>!function(){function t(t){document.documentElement.setAttribute("data-theme",t)}var e=function(){var t=null;try{t=localStorage.getItem("theme")}catch(t){}return t}();t(null!==e?e:"light")}()</script><div id="__docusaurus">
|
|
<nav class="navbar navbar--fixed-top navbar--dark"><div class="navbar__inner"><div class="navbar__items"><div aria-label="Navigation bar toggle" class="navbar__toggle" role="button" tabindex="0"><svg xmlns="http://www.w3.org/2000/svg" width="30" height="30" viewBox="0 0 30 30" role="img" focusable="false"><title>Menu</title><path stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="2" d="M4 7h22M4 15h22M4 23h22"></path></svg></div><a class="navbar__brand" href="/"><img class="navbar__logo" src="/img/header_logo.svg" alt="React Native"><strong class="navbar__title">React Native</strong></a><div class="navbar__item dropdown dropdown--hoverable dropdown--left"><a class="navbar__item navbar__link" href="/docs/getting-started">0.63</a><ul class="dropdown__menu"><li><a class="dropdown__link" href="/docs/next/panresponder">Next</a></li><li><a aria-current="page" class="dropdown__link dropdown__link--active" href="/docs/panresponder">0.63</a></li><li><a class="dropdown__link" href="/docs/0.62/panresponder">0.62</a></li><li><a class="dropdown__link" href="/docs/0.61/panresponder">0.61</a></li><li><a class="dropdown__link" href="/docs/0.60/panresponder">0.60</a></li><li><a class="dropdown__link" href="/versions">All versions</a></li></ul></div></div><div class="navbar__items navbar__items--right"><a class="navbar__item navbar__link" href="/docs/getting-started">Docs</a><a class="navbar__item navbar__link" href="/docs/components-and-apis">Components</a><a class="navbar__item navbar__link navbar__link--active" href="/docs/accessibilityinfo">API</a><a class="navbar__item navbar__link" href="/help">Community</a><a class="navbar__item navbar__link" href="/blog">Blog</a><a href="https://github.com/facebook/react-native" target="_blank" rel="noopener noreferrer" class="navbar__item navbar__link navbar-github-link" aria-label="GitHub repository"></a><div class="react-toggle react-toggle--disabled displayOnlyInLargeViewport_3lWe"><div class="react-toggle-track"><div class="react-toggle-track-check"><span class="toggle_gnXW">🌜</span></div><div class="react-toggle-track-x"><span class="toggle_gnXW">🌞</span></div></div><div class="react-toggle-thumb"></div><input type="checkbox" disabled="" aria-label="Dark mode toggle" class="react-toggle-screenreader-only"></div><button type="button" class="DocSearch DocSearch-Button" aria-label="Search"><svg width="20" height="20" class="DocSearch-Search-Icon" viewBox="0 0 20 20"><path d="M14.386 14.386l4.0877 4.0877-4.0877-4.0877c-2.9418 2.9419-7.7115 2.9419-10.6533 0-2.9419-2.9418-2.9419-7.7115 0-10.6533 2.9418-2.9419 7.7115-2.9419 10.6533 0 2.9419 2.9418 2.9419 7.7115 0 10.6533z" stroke="currentColor" fill="none" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="DocSearch-Button-Placeholder">Search</span><span class="DocSearch-Button-Key">⌘</span><span class="DocSearch-Button-Key">K</span></button></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div><div class="navbar-sidebar"><div class="navbar-sidebar__brand"><a class="navbar__brand" href="/"><img class="navbar__logo" src="/img/header_logo.svg" alt="React Native"><strong class="navbar__title">React Native</strong></a></div><div class="navbar-sidebar__items"><div class="menu"><ul class="menu__list"><li class="menu__list-item"><a class="menu__link" href="/docs/getting-started">Docs</a></li><li class="menu__list-item"><a class="menu__link" href="/docs/components-and-apis">Components</a></li><li class="menu__list-item"><a class="menu__link navbar__link--active" href="/docs/accessibilityinfo">API</a></li><li class="menu__list-item"><a class="menu__link" href="/help">Community</a></li><li class="menu__list-item"><a class="menu__link" href="/blog">Blog</a></li><li class="menu__list-item"><a role="button" class="menu__link menu__link--sublist">Versions</a><ul class="menu__list"><li class="menu__list-item"><a class="menu__link" href="/docs/next/panresponder">Next</a></li><li class="menu__list-item"><a aria-current="page" class="menu__link menu__link--active" href="/docs/panresponder">0.63</a></li><li class="menu__list-item"><a class="menu__link" href="/docs/0.62/panresponder">0.62</a></li><li class="menu__list-item"><a class="menu__link" href="/docs/0.61/panresponder">0.61</a></li><li class="menu__list-item"><a class="menu__link" href="/docs/0.60/panresponder">0.60</a></li><li class="menu__list-item"><a class="menu__link" href="/versions">All versions</a></li></ul></li><li class="menu__list-item"><a href="https://github.com/facebook/react-native" target="_blank" rel="noopener noreferrer" class="menu__link navbar-github-link" aria-label="GitHub repository"></a></li></ul></div></div></div></nav><div class="main-wrapper"><div class="docPage_2UBv"><div class="docSidebarContainer_1hqR" role="complementary"><div class="sidebar_MSwm"><div class="menu menu--responsive menu_2hiu"><button aria-label="Open Menu" aria-haspopup="true" class="button button--secondary button--sm menu__button" type="button"><svg aria-label="Menu" class="sidebarMenuIcon_37TU" xmlns="http://www.w3.org/2000/svg" height="24" width="24" viewBox="0 0 32 32" role="img" focusable="false"><title>Menu</title><path stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="2" d="M4 7h22M4 15h22M4 23h22"></path></svg></button><ul class="menu__list"><li class="menu__list-item"><a class="menu__link menu__link--sublist menu__link--active" href="#!">APIs</a><ul class="menu__list"><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/accessibilityinfo">AccessibilityInfo</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/alert">Alert</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/animated">Animated</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/animatedvalue">Animated.Value</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/animatedvaluexy">Animated.ValueXY</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/appearance">Appearance</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/appregistry">AppRegistry</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/appstate">AppState</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/devsettings">DevSettings</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/dimensions">Dimensions</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/easing">Easing</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/interactionmanager">InteractionManager</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/keyboard">Keyboard</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/layoutanimation">LayoutAnimation</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/linking">Linking</a></li><li class="menu__list-item"><a aria-current="page" class="menu__link menu__link--active active" tabindex="0" href="/docs/panresponder">PanResponder</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/pixelratio">PixelRatio</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/platform">Platform</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/platformcolor">PlatformColor</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/share">Share</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/stylesheet">StyleSheet</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/systrace">Systrace</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/transforms">Transforms</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/vibration">Vibration</a></li><li class="menu__list-item"><a class="menu__link menu__link--sublist" href="#!" tabindex="0">Hooks</a><ul class="menu__list"><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/usecolorscheme">useColorScheme</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/usewindowdimensions">useWindowDimensions</a></li></ul></li><li class="menu__list-item"><a class="menu__link menu__link--sublist" href="#!" tabindex="0">Android APIs</a><ul class="menu__list"><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/backhandler">BackHandler</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/permissionsandroid">PermissionsAndroid</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/toastandroid">ToastAndroid</a></li></ul></li><li class="menu__list-item"><a class="menu__link menu__link--sublist" href="#!" tabindex="0">iOS APIs</a><ul class="menu__list"><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/actionsheetios">ActionSheetIOS</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/dynamiccolorios">DynamicColorIOS</a></li><li class="menu__list-item"><a class="menu__link" tabindex="0" href="/docs/settings">Settings</a></li></ul></li></ul></li></ul></div></div></div><main class="docMainContainer_1rYT"><div class="container padding-vert--lg docItemWrapper_1Hme"><div class="row"><div class="col docItemCol_2AGf"><div class="docItemContainer_1tAC"><article><header><h1 class="docTitle_cWlf">PanResponder</h1></header><div class="markdown"><p><code>PanResponder</code> reconciles several touches into a single gesture. It makes single-touch gestures resilient to extra touches, and can be used to recognize basic multi-touch gestures.</p><p>By default, <code>PanResponder</code> holds an <code>InteractionManager</code> handle to block long-running JS events from interrupting active gestures.</p><p>It provides a predictable wrapper of the responder handlers provided by the <a href="/docs/gesture-responder-system">gesture responder system</a>. For each handler, it provides a new <code>gestureState</code> object alongside the native event object:</p><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-jsx codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token function-variable function" style="color:#79b6f2">onPanResponderMove</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">event</span><span class="token parameter punctuation" style="color:#657b83">,</span><span class="token parameter"> gestureState</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token punctuation" style="color:#657b83">}</span></div></div></div></div></div><p>A native event is a synthetic touch event with form of <a href="/docs/pressevent">PressEvent</a>.</p><p>A <code>gestureState</code> object has the following:</p><ul><li><code>stateID</code> - ID of the gestureState- persisted as long as there at least one touch on screen</li><li><code>moveX</code> - the latest screen coordinates of the recently-moved touch</li><li><code>moveY</code> - the latest screen coordinates of the recently-moved touch</li><li><code>x0</code> - the screen coordinates of the responder grant</li><li><code>y0</code> - the screen coordinates of the responder grant</li><li><code>dx</code> - accumulated distance of the gesture since the touch started</li><li><code>dy</code> - accumulated distance of the gesture since the touch started</li><li><code>vx</code> - current velocity of the gesture</li><li><code>vy</code> - current velocity of the gesture</li><li><code>numberActiveTouches</code> - Number of touches currently on screen</li></ul><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="usage-pattern"></a>Usage Pattern<a aria-hidden="true" tabindex="-1" class="hash-link" href="#usage-pattern" title="Direct link to heading">#</a></h2><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-jsx codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">const</span><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">ExampleComponent</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">const</span><span class="token plain"> panResponder </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> React</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">useRef</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> PanResponder</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">create</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// Ask to be the responder:</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">onStartShouldSetPanResponder</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">evt</span><span class="token parameter punctuation" style="color:#657b83">,</span><span class="token parameter"> gestureState</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"> </span><span class="token boolean" style="color:#ff8b50">true</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">onStartShouldSetPanResponderCapture</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">evt</span><span class="token parameter punctuation" style="color:#657b83">,</span><span class="token parameter"> gestureState</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token boolean" style="color:#ff8b50">true</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">onMoveShouldSetPanResponder</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">evt</span><span class="token parameter punctuation" style="color:#657b83">,</span><span class="token parameter"> gestureState</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"> </span><span class="token boolean" style="color:#ff8b50">true</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">onMoveShouldSetPanResponderCapture</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">evt</span><span class="token parameter punctuation" style="color:#657b83">,</span><span class="token parameter"> gestureState</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token boolean" style="color:#ff8b50">true</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
|
|
</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">onPanResponderGrant</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">evt</span><span class="token parameter punctuation" style="color:#657b83">,</span><span class="token parameter"> gestureState</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// The gesture has started. Show visual feedback so the user knows</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// what is happening!</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// gestureState.d{x,y} will be set to zero now</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">onPanResponderMove</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">evt</span><span class="token parameter punctuation" style="color:#657b83">,</span><span class="token parameter"> gestureState</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// The most recent move distance is gestureState.move{X,Y}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// The accumulated gesture distance since becoming responder is</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// gestureState.d{x,y}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">onPanResponderTerminationRequest</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">evt</span><span class="token parameter punctuation" style="color:#657b83">,</span><span class="token parameter"> gestureState</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token boolean" style="color:#ff8b50">true</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">onPanResponderRelease</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">evt</span><span class="token parameter punctuation" style="color:#657b83">,</span><span class="token parameter"> gestureState</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// The user has released all touches while this view is the</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// responder. This typically means a gesture has succeeded</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">onPanResponderTerminate</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">evt</span><span class="token parameter punctuation" style="color:#657b83">,</span><span class="token parameter"> gestureState</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// Another component has become the responder, so this gesture</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// should be cancelled</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token punctuation" style="color:#657b83">,</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token function-variable function" style="color:#79b6f2">onShouldBlockNativeResponder</span><span class="token punctuation" style="color:#657b83">:</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token parameter">evt</span><span class="token parameter punctuation" style="color:#657b83">,</span><span class="token parameter"> gestureState</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token operator" style="color:#fc929e">=></span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// Returns whether this component should block native components from becoming the JS</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// responder. Returns true by default. Is currently only supported on android.</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">return</span><span class="token plain"> </span><span class="token boolean" style="color:#ff8b50">true</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">}</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">.</span><span class="token plain">current</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain" style="display:inline-block">
|
|
</span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">return</span><span class="token plain"> </span><span class="token tag punctuation" style="color:#657b83"><</span><span class="token tag class-name" style="color:#fac863">View</span><span class="token tag" style="color:#fc929e"> </span><span class="token tag spread punctuation" style="color:#657b83">{</span><span class="token tag spread punctuation" style="color:#657b83">...</span><span class="token tag spread attr-value" style="color:#8dc891">panResponder</span><span class="token tag spread punctuation" style="color:#657b83">.</span><span class="token tag spread attr-value" style="color:#8dc891">panHandlers</span><span class="token tag spread punctuation" style="color:#657b83">}</span><span class="token tag" style="color:#fc929e"> </span><span class="token tag punctuation" style="color:#657b83">/></span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">}</span><span class="token punctuation" style="color:#657b83">;</span></div></div></div></div></div><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="example"></a>Example<a aria-hidden="true" tabindex="-1" class="hash-link" href="#example" title="Direct link to heading">#</a></h2><p><code>PanResponder</code> works with <code>Animated</code> API to help build complex gestures in the UI. The following example contains an animated <code>View</code> component which can be dragged freely across the screen</p><div><ul role="tablist" aria-orientation="horizontal" class="tabs"><li role="tab" tabindex="0" aria-selected="true" class="tabs__item tabItem_3gSF tabs__item--active" style="outline:none">Function Component</li><li role="tab" tabindex="0" aria-selected="false" class="tabs__item tabItem_3gSF" style="outline:none">Class Component</li></ul><div role="tabpanel" class="margin-vert--md"><div><div class="snack-player" data-snack-name="PanResponder" data-snack-description="Example usage" data-snack-code="import%20React%2C%20%7B%20useRef%20%7D%20from%20%22react%22%3B%0Aimport%20%7B%20Animated%2C%20View%2C%20StyleSheet%2C%20PanResponder%2C%20Text%20%7D%20from%20%22react-native%22%3B%0A%0Aconst%20App%20%3D%20()%20%3D%3E%20%7B%0A%20%20const%20pan%20%3D%20useRef(new%20Animated.ValueXY()).current%3B%0A%0A%20%20const%20panResponder%20%3D%20useRef(%0A%20%20%20%20PanResponder.create(%7B%0A%20%20%20%20%20%20onMoveShouldSetPanResponder%3A%20()%20%3D%3E%20true%2C%0A%20%20%20%20%20%20onPanResponderGrant%3A%20()%20%3D%3E%20%7B%0A%20%20%20%20%20%20%20%20pan.setOffset(%7B%0A%20%20%20%20%20%20%20%20%20%20x%3A%20pan.x._value%2C%0A%20%20%20%20%20%20%20%20%20%20y%3A%20pan.y._value%0A%20%20%20%20%20%20%20%20%7D)%3B%0A%20%20%20%20%20%20%7D%2C%0A%20%20%20%20%20%20onPanResponderMove%3A%20Animated.event(%0A%20%20%20%20%20%20%20%20%5B%0A%20%20%20%20%20%20%20%20%20%20null%2C%0A%20%20%20%20%20%20%20%20%20%20%7B%20dx%3A%20pan.x%2C%20dy%3A%20pan.y%20%7D%0A%20%20%20%20%20%20%20%20%5D%0A%20%20%20%20%20%20)%2C%0A%20%20%20%20%20%20onPanResponderRelease%3A%20()%20%3D%3E%20%7B%0A%20%20%20%20%20%20%20%20pan.flattenOffset()%3B%0A%20%20%20%20%20%20%7D%0A%20%20%20%20%7D)%0A%20%20).current%3B%0A%0A%20%20return%20(%0A%20%20%20%20%3CView%20style%3D%7Bstyles.container%7D%3E%0A%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.titleText%7D%3EDrag%20this%20box!%3C%2FText%3E%0A%20%20%20%20%20%20%3CAnimated.View%0A%20%20%20%20%20%20%20%20style%3D%7B%7B%0A%20%20%20%20%20%20%20%20%20%20transform%3A%20%5B%7B%20translateX%3A%20pan.x%20%7D%2C%20%7B%20translateY%3A%20pan.y%20%7D%5D%0A%20%20%20%20%20%20%20%20%7D%7D%0A%20%20%20%20%20%20%20%20%7B...panResponder.panHandlers%7D%0A%20%20%20%20%20%20%3E%0A%20%20%20%20%20%20%20%20%3CView%20style%3D%7Bstyles.box%7D%20%2F%3E%0A%20%20%20%20%20%20%3C%2FAnimated.View%3E%0A%20%20%20%20%3C%2FView%3E%0A%20%20)%3B%0A%7D%0A%0Aconst%20styles%20%3D%20StyleSheet.create(%7B%0A%20%20container%3A%20%7B%0A%20%20%20%20flex%3A%201%2C%0A%20%20%20%20alignItems%3A%20%22center%22%2C%0A%20%20%20%20justifyContent%3A%20%22center%22%0A%20%20%7D%2C%0A%20%20titleText%3A%20%7B%0A%20%20%20%20fontSize%3A%2014%2C%0A%20%20%20%20lineHeight%3A%2024%2C%0A%20%20%20%20fontWeight%3A%20%22bold%22%0A%20%20%7D%2C%0A%20%20box%3A%20%7B%0A%20%20%20%20height%3A%20150%2C%0A%20%20%20%20width%3A%20150%2C%0A%20%20%20%20backgroundColor%3A%20%22blue%22%2C%0A%20%20%20%20borderRadius%3A%205%0A%20%20%7D%0A%7D)%3B%0A%0Aexport%20default%20App%3B" data-snack-platform="web" data-snack-supported-platforms="ios,android,web" data-snack-theme="light" data-snack-preview="true" data-snack-loading="lazy"></div></div></div></div><p>Try the <a href="https://github.com/facebook/react-native/blob/master/packages/rn-tester/js/examples/PanResponder/PanResponderExample.js" target="_blank" rel="noopener noreferrer">PanResponder example in RNTester</a>.</p><hr><h1><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="reference"></a>Reference<a aria-hidden="true" tabindex="-1" class="hash-link" href="#reference" title="Direct link to heading">#</a></h1><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="methods"></a>Methods<a aria-hidden="true" tabindex="-1" class="hash-link" href="#methods" title="Direct link to heading">#</a></h2><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="create"></a><code>create()</code><a aria-hidden="true" tabindex="-1" class="hash-link" href="#create" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-jsx codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">create</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">config</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div></div></div><p><strong>Parameters:</strong></p><table><thead><tr><th>Name</th><th>Type</th><th>Required</th><th>Description</th></tr></thead><tbody><tr><td>config</td><td>object</td><td>Yes</td><td>Refer below</td></tr></tbody></table><p>The config object provides enhanced versions of all of the responder callbacks that provide not only the <a href="/docs/pressevent"><code>PressEvent</code></a>, but also the <code>PanResponder</code> gesture state, by replacing the word <code>Responder</code> with <code>PanResponder</code> in each of the typical <code>onResponder*</code> callbacks. For example, the <code>config</code> object would look like:</p><ul><li><code>onMoveShouldSetPanResponder: (e, gestureState) => {...}</code></li><li><code>onMoveShouldSetPanResponderCapture: (e, gestureState) => {...}</code></li><li><code>onStartShouldSetPanResponder: (e, gestureState) => {...}</code></li><li><code>onStartShouldSetPanResponderCapture: (e, gestureState) => {...}</code></li><li><code>onPanResponderReject: (e, gestureState) => {...}</code></li><li><code>onPanResponderGrant: (e, gestureState) => {...}</code></li><li><code>onPanResponderStart: (e, gestureState) => {...}</code></li><li><code>onPanResponderEnd: (e, gestureState) => {...}</code></li><li><code>onPanResponderRelease: (e, gestureState) => {...}</code></li><li><code>onPanResponderMove: (e, gestureState) => {...}</code></li><li><code>onPanResponderTerminate: (e, gestureState) => {...}</code></li><li><code>onPanResponderTerminationRequest: (e, gestureState) => {...}</code></li><li><code>onShouldBlockNativeResponder: (e, gestureState) => {...}</code></li></ul><p>In general, for events that have capture equivalents, we update the gestureState once in the capture phase and can use it in the bubble phase as well.</p><p>Be careful with <code>onStartShould*</code> callbacks. They only reflect updated <code>gestureState</code> for start/end events that bubble/capture to the Node. Once the node is the responder, you can rely on every start/end event being processed by the gesture and <code>gestureState</code> being updated accordingly. (numberActiveTouches) may not be totally accurate unless you are the responder.</p></div></article><div class="docMetadata margin-vert--xl"><div class="row"><div class="col"><a href="https://github.com/facebook/react-native-website/blob/master/website/versioned_docs/version-0.63/panresponder.md" target="_blank" rel="noreferrer noopener"><svg fill="currentColor" height="1.2em" width="1.2em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 40 40" style="margin-right:0.3em;vertical-align:sub"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col text--right"><em><small class="docMetadata-updated">Last updated on <time datetime="2020-10-29T04:19:29.000Z" class="docLastUpdatedAt_1gIo">10/29/2020</time></small></em></div></div></div><div class="margin-vert--lg"><nav class="pagination-nav" aria-label="Blog list page navigation"><div class="pagination-nav__item"><a class="pagination-nav__link" href="/docs/linking"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">« Linking</div></a></div><div class="pagination-nav__item pagination-nav__item--next"><a class="pagination-nav__link" href="/docs/pixelratio"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">PixelRatio »</div></a></div></nav></div></div></div><div class="col col--3"><div class="tableOfContents_3iuQ"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#usage-pattern" class="table-of-contents__link">Usage Pattern</a></li><li><a href="#example" class="table-of-contents__link">Example</a></li><li><a href="#methods" class="table-of-contents__link">Methods</a><ul><li><a href="#create" class="table-of-contents__link"><code>create()</code></a></li></ul></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container"><div class="row footer__links"><div class="col footer__col"><h4 class="footer__title">Docs</h4><ul class="footer__items"><li class="footer__item"><a class="footer__link-item" href="/docs/getting-started">Getting Started</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/tutorial">Tutorial</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/components-and-apis">Components and APIs</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/more-resources">More Resources</a></li></ul></div><div class="col footer__col"><h4 class="footer__title">Community</h4><ul class="footer__items"><li class="footer__item"><a class="footer__link-item" href="/help">The React Native Community</a></li><li class="footer__item"><a class="footer__link-item" href="/showcase">Who's using React Native?</a></li><li class="footer__item"><a href="https://stackoverflow.com/questions/tagged/react-native" target="_blank" rel="noopener noreferrer" class="footer__link-item">Ask Questions on Stack Overflow</a></li><li class="footer__item"><a href="https://github.com/facebook/react-native/blob/master/CONTRIBUTING.md" target="_blank" rel="noopener noreferrer" class="footer__link-item">Contributor Guide</a></li><li class="footer__item"><a href="https://dev.to/t/reactnative" target="_blank" rel="noopener noreferrer" class="footer__link-item">DEV Community</a></li></ul></div><div class="col footer__col"><h4 class="footer__title">Find us</h4><ul class="footer__items"><li class="footer__item"><a class="footer__link-item" href="/blog">Blog</a></li><li class="footer__item"><a href="https://twitter.com/reactnative" target="_blank" rel="noopener noreferrer" class="footer__link-item">Twitter</a></li><li class="footer__item"><a href="https://github.com/facebook/react-native" target="_blank" rel="noopener noreferrer" class="footer__link-item">GitHub</a></li></ul></div><div class="col footer__col"><h4 class="footer__title">More</h4><ul class="footer__items"><li class="footer__item"><a href="https://reactjs.org/" target="_blank" rel="noopener noreferrer" class="footer__link-item">React</a></li><li class="footer__item"><a href="https://opensource.facebook.com/legal/privacy" target="_blank" rel="noopener noreferrer" class="footer__link-item">Privacy Policy</a></li><li class="footer__item"><a href="https://opensource.facebook.com/legal/terms" target="_blank" rel="noopener noreferrer" class="footer__link-item">Terms of Service</a></li></ul></div></div><div class="text--center"><div class="margin-bottom--sm"><a href="https://opensource.facebook.com" target="_blank" rel="noopener noreferrer" class="footerLogoLink_19Ac"><img class="footer__logo" alt="Facebook Open Source Logo" src="/img/oss_logo.png"></a></div><div>Copyright © 2020 Facebook, Inc.</div></div></div></footer></div>
|
|
<script src="/styles.07d522c6.js"></script>
|
|
<script src="/runtime~main.56c3f166.js"></script>
|
|
<script src="/main.5a3c9855.js"></script>
|
|
<script src="/1.ba9ce8bd.js"></script>
|
|
<script src="/2.58cb5d3d.js"></script>
|
|
<script src="/1f391b9e.a824c215.js"></script>
|
|
<script src="/943.8b024446.js"></script>
|
|
<script src="/ee5b3385.b4fff665.js"></script>
|
|
<script src="/17896441.0c201679.js"></script>
|
|
<script src="/aaec36e1.324c2ef9.js"></script>
|
|
</body>
|
|
</html> |