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<!DOCTYPE html><html><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><title>NativeMethodsMixin – React Native | A framework for building native apps using React</title><meta name="viewport" content="width=device-width"><meta property="og:title" content="NativeMethodsMixin – React Native | A framework for building native apps using React"><meta property="og:type" content="website"><meta property="og:url" content="http://facebook.github.io/react-native/index.html"><meta property="og:image" content="http://facebook.github.io/react-native/img/opengraph.png?2"><meta property="og:description" content="A framework for building native apps using React"><base href="/react-native/"><link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css"><link rel="shortcut icon" href="img/favicon.png?2"><link rel="stylesheet" href="css/react-native.css"><script type="text/javascript" src="//use.typekit.net/vqa1hcx.js"></script><script type="text/javascript">try{Typekit.load();}catch(e){}</script></head><body><div class="container"><div class="nav-main"><div class="wrap"><a class="nav-home" href=""><img src="img/header_logo.png">React Native</a><a class="nav-version" href="/react-native/versions.html">0.31</a><div class="nav-site-wrapper"><ul class="nav-site nav-site-internal"><li><a href="docs/getting-started.html" class="active" data-target=".nav-docs">Docs</a></li><li><a href="support.html" class="">Support</a></li><li><a href="showcase.html" class="">Showcase</a></li><li><a href="blog/" class="">Blog</a></li></ul><div class="algolia-search-wrapper"><input id="algolia-doc-search" 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:0;" class="" href="docs/getting-started.html">Getting Started</a></li><li><a style="margin-left:0;" class="" href="docs/tutorial.html">Tutorial</a></li><li><a style="margin-left:0;" class="" href="docs/props.html">Props</a></li><li><a style="margin-left:0;" class="" href="docs/state.html">State</a></li><li><a style="margin-left:0;" class="" href="docs/style.html">Style</a></li><li><a style="margin-left:0;" class="" href="docs/height-and-width.html">Height and Width</a></li><li><a style="margin-left:0;" class="" href="docs/flexbox.html">Layout with Flexbox</a></li><li><a style="margin-left:0;" class="" href="docs/handling-text-input.html">Handling Text Input</a></li><li><a style="margin-left:0;" class="" href="docs/using-a-scrollview.html">Using a ScrollView</a></li><li><a style="margin-left:0;" class="" href="docs/using-a-listview.html">Using a ListView</a></li><li><a style="margin-left:0;" class="" href="docs/network.html">Networking</a></li><li><a style="margin-left:0;" class="" href="docs/using-navigators.html">Using Navigators</a></li><li><a style="margin-left:0;" 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:0;" class="" href="docs/integration-with-existing-apps.html">Integration With Existing Apps</a></li><li><a style="margin-left:0;" class="" href="docs/colors.html">Colors</a></li><li><a style="margin-left:0;" class="" href="docs/images.html">Images</a></li><li><a style="margin-left:0;" class="" href="docs/handling-touches.html">Handling Touches</a></li><li><a style="margin-left:0;" class="" href="docs/animations.html">Animations</a></li><li><a style="margin-left:0;" class="" href="docs/accessibility.html">Accessibility</a></li><li><a style="margin-left:0;" class="" href="docs/timers.html">Timers</a></li><li><a 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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/activityindicatorios.html">ActivityIndicatorIOS</a></li><li><a style="margin-left:0;" class="" href="docs/datepickerios.html">DatePickerIOS</a></li><li><a style="margin-left:0;" class="" href="docs/drawerlayoutandroid.html">DrawerLayoutAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/image.html">Image</a></li><li><a style="margin-left:0;" class="" href="docs/listview.html">ListView</a></li><li><a style="margin-left:0;" class="" 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style="margin-left:0;" class="" href="docs/touchablehighlight.html">TouchableHighlight</a></li><li><a style="margin-left:0;" class="" href="docs/touchablenativefeedback.html">TouchableNativeFeedback</a></li><li><a style="margin-left:0;" class="" href="docs/touchableopacity.html">TouchableOpacity</a></li><li><a style="margin-left:0;" class="" href="docs/touchablewithoutfeedback.html">TouchableWithoutFeedback</a></li><li><a style="margin-left:0;" class="" href="docs/view.html">View</a></li><li><a style="margin-left:0;" class="" href="docs/viewpagerandroid.html">ViewPagerAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/webview.html">WebView</a></li></ul></div><div class="nav-docs-section"><h3>apis</h3><ul><li><a style="margin-left:0;" class="" href="docs/actionsheetios.html">ActionSheetIOS</a></li><li><a style="margin-left:0;" class="" href="docs/adsupportios.html">AdSupportIOS</a></li><li><a style="margin-left:0;" class="" href="docs/alert.html">Alert</a></li><li><a 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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/intentandroid.html">IntentAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/interactionmanager.html">InteractionManager</a></li><li><a style="margin-left:0;" class="" href="docs/layoutanimation.html">LayoutAnimation</a></li><li><a style="margin-left:0;" class="" href="docs/linking.html">Linking</a></li><li><a style="margin-left:0;" class="active" href="docs/nativemethodsmixin.html">NativeMethodsMixin</a></li><li><a style="margin-left:0;" class="" href="docs/nativemodules.html">NativeModules</a></li><li><a style="margin-left:0;" class="" href="docs/netinfo.html">NetInfo</a></li><li><a style="margin-left:0;" class="" href="docs/panresponder.html">PanResponder</a></li><li><a style="margin-left:0;" class="" href="docs/pixelratio.html">PixelRatio</a></li><li><a style="margin-left:0;" class="" href="docs/pushnotificationios.html">PushNotificationIOS</a></li><li><a style="margin-left:0;" class="" href="docs/settings.html">Settings</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/node_modules/react/lib/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/nativemodules.html#content">Next →</a></div></div></section><footer class="wrap"><div class="center">© 2016 Facebook Inc.</div></footer></div><div id="fb-root"></div><script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script><script>
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