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<!DOCTYPE html><html><head><title>NativeMethodsMixin</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="NativeMethodsMixin"><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 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href="docs/native-modules-android.html">Native Modules</a></li><li><a style="margin-left:0;" class="" href="docs/native-components-android.html">Native UI Components</a></li><li><a style="margin-left:0;" class="" href="docs/headless-js-android.html">Headless JS</a></li><li><a style="margin-left:0;" class="" href="docs/signed-apk-android.html">Generating Signed APK</a></li><li><a style="margin-left:0;" class="" href="docs/android-ui-performance.html">Profiling Android UI Performance</a></li><li><a style="margin-left:0;" class="" href="docs/android-building-from-source.html">Building React Native from source</a></li></ul></div><div class="nav-docs-section"><h3>components</h3><ul><li><a style="margin-left:0;" class="" href="docs/activityindicator.html">ActivityIndicator</a></li><li><a style="margin-left:0;" class="" href="docs/button.html">Button</a></li><li><a style="margin-left:0;" class="" href="docs/datepickerios.html">DatePickerIOS</a></li><li><a style="margin-left:0;" class="" 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class="" href="docs/adsupportios.html">AdSupportIOS</a></li><li><a style="margin-left:0;" class="" href="docs/alert.html">Alert</a></li><li><a style="margin-left:0;" class="" href="docs/alertios.html">AlertIOS</a></li><li><a style="margin-left:0;" class="" href="docs/animated.html">Animated</a></li><li><a style="margin-left:0;" class="" href="docs/appregistry.html">AppRegistry</a></li><li><a style="margin-left:0;" class="" href="docs/appstate.html">AppState</a></li><li><a style="margin-left:0;" class="" href="docs/asyncstorage.html">AsyncStorage</a></li><li><a style="margin-left:0;" class="" href="docs/backandroid.html">BackAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/cameraroll.html">CameraRoll</a></li><li><a style="margin-left:0;" class="" href="docs/clipboard.html">Clipboard</a></li><li><a style="margin-left:0;" class="" href="docs/datepickerandroid.html">DatePickerAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/dimensions.html">Dimensions</a></li><li><a style="margin-left:0;" class="" href="docs/easing.html">Easing</a></li><li><a style="margin-left:0;" class="" href="docs/geolocation.html">Geolocation</a></li><li><a style="margin-left:0;" class="" href="docs/imageeditor.html">ImageEditor</a></li><li><a style="margin-left:0;" class="" href="docs/imagepickerios.html">ImagePickerIOS</a></li><li><a style="margin-left:0;" class="" href="docs/imagestore.html">ImageStore</a></li><li><a style="margin-left:0;" class="" href="docs/interactionmanager.html">InteractionManager</a></li><li><a style="margin-left:0;" class="" href="docs/keyboard.html">Keyboard</a></li><li><a style="margin-left:0;" class="" href="docs/layoutanimation.html">LayoutAnimation</a></li><li><a style="margin-left:0;" class="" href="docs/linking.html">Linking</a></li><li><a style="margin-left:0;" class="active" href="docs/nativemethodsmixin.html">NativeMethodsMixin</a></li><li><a style="margin-left:0;" class="" href="docs/netinfo.html">NetInfo</a></li><li><a style="margin-left:0;" class="" href="docs/panresponder.html">PanResponder</a></li><li><a style="margin-left:0;" class="" href="docs/permissionsandroid.html">PermissionsAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/pixelratio.html">PixelRatio</a></li><li><a style="margin-left:0;" class="" href="docs/pushnotificationios.html">PushNotificationIOS</a></li><li><a style="margin-left:0;" class="" href="docs/settings.html">Settings</a></li><li><a style="margin-left:0;" class="" href="docs/share.html">Share</a></li><li><a style="margin-left:0;" class="" href="docs/statusbarios.html">StatusBarIOS</a></li><li><a style="margin-left:0;" class="" href="docs/stylesheet.html">StyleSheet</a></li><li><a style="margin-left:0;" class="" href="docs/systrace.html">Systrace</a></li><li><a style="margin-left:0;" class="" href="docs/timepickerandroid.html">TimePickerAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/toastandroid.html">ToastAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/vibration.html">Vibration</a></li><li><a style="margin-left:0;" class="" href="docs/vibrationios.html">VibrationIOS</a></li><li><a style="margin-left:0;" class="" href="docs/layout-props.html">Layout Props</a></li><li><a style="margin-left:0;" 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="nativemethodsmixin"></a>NativeMethodsMixin <a class="hash-link" href="docs/nativemethodsmixin.html#nativemethodsmixin">#</a></h1><div><div><p><code>NativeMethodsMixin</code> provides methods to access the underlying native
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component directly. This can be useful in cases when you want to focus
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a view or measure its on-screen dimensions, for example.</p><p>The methods described here are available on most of the default components
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provided by React Native. Note, however, that they are <em>not</em> available on
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composite components that aren't directly backed by a native view. This will
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generally include most components that you define in your own app. For more
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information, see <a href="docs/direct-manipulation.html" target="_blank">Direct
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Manipulation</a>.</p></div><span><h3><a class="anchor" name="methods"></a>Methods <a class="hash-link" href="docs/nativemethodsmixin.html#methods">#</a></h3><div class="props"><div class="prop"><h4 class="methodTitle"><a class="anchor" name="measure"></a><span class="methodType">static </span>measure<span class="methodType">(callback)</span> <a class="hash-link" href="docs/nativemethodsmixin.html#measure">#</a></h4><div><p>Determines the location on screen, width, and height of the given view and
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returns the values via an async callback. If successful, the callback will
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be called with the following arguments:</p><ul><li>x</li><li>y</li><li>width</li><li>height</li><li>pageX</li><li>pageY</li></ul><p>Note that these measurements are not available until after the rendering
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has been completed in native. If you need the measurements as soon as
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possible, consider using the <a href="docs/view.html#onlayout" target="_blank"><code>onLayout</code>
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prop</a> instead.</p></div></div><div class="prop"><h4 class="methodTitle"><a class="anchor" name="measureinwindow"></a><span class="methodType">static </span>measureInWindow<span class="methodType">(callback)</span> <a class="hash-link" href="docs/nativemethodsmixin.html#measureinwindow">#</a></h4><div><p>Determines the location of the given view in the window and returns the
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values via an async callback. If the React root view is embedded in
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another native view, this will give you the absolute coordinates. If
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successful, the callback will be called with the following
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arguments:</p><ul><li>x</li><li>y</li><li>width</li><li>height</li></ul><p>Note that these measurements are not available until after the rendering
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has been completed in native.</p></div></div><div class="prop"><h4 class="methodTitle"><a class="anchor" name="measurelayout"></a><span class="methodType">static </span>measureLayout<span class="methodType">(relativeToNativeNode, onSuccess, onFail)</span> <a class="hash-link" href="docs/nativemethodsmixin.html#measurelayout">#</a></h4><div><p>Like <a href="#measure" target=""><code>measure()</code></a>, but measures the view relative an ancestor,
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specified as <code>relativeToNativeNode</code>. This means that the returned x, y
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are relative to the origin x, y of the ancestor view.</p><p>As always, to obtain a native node handle for a component, you can use
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<code>React.findNodeHandle(component)</code>.</p></div></div><div class="prop"><h4 class="methodTitle"><a class="anchor" name="focus"></a><span class="methodType">static </span>focus<span class="methodType">(0)</span> <a class="hash-link" href="docs/nativemethodsmixin.html#focus">#</a></h4><div><p>Requests focus for the given input or view. The exact behavior triggered
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will depend on the platform and type of view.</p></div></div><div class="prop"><h4 class="methodTitle"><a class="anchor" name="blur"></a><span class="methodType">static </span>blur<span class="methodType">(0)</span> <a class="hash-link" href="docs/nativemethodsmixin.html#blur">#</a></h4><div><p>Removes focus from an input or view. This is the opposite of <code>focus()</code>.</p></div></div></div></span></div><p class="edit-page-block">You can <a target="_blank" href="https://github.com/facebook/react-native/blob/master/Libraries/Renderer/src/renderers/native/NativeMethodsMixin.js">edit the content above on GitHub</a> and send us a pull request!</p><div class="docs-prevnext"><a class="docs-prev" href="docs/linking.html#content">← Prev</a><a class="docs-next" href="docs/netinfo.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://productpains.com/product/react-native/" 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>
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