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<!DOCTYPE html><html><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><title>Picker – React Native | A framework for building native apps using React</title><meta name="viewport" content="width=device-width"><meta property="og:title" content="Picker – 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">0.33</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 style="margin-left:0;" class="" href="docs/direct-manipulation.html">Direct Manipulation</a></li><li><a style="margin-left:0;" class="" href="docs/debugging.html">Debugging</a></li><li><a style="margin-left:0;" class="" href="docs/testing.html">Testing</a></li><li><a style="margin-left:0;" class="" href="docs/javascript-environment.html">JavaScript Environment</a></li><li><a style="margin-left:0;" class="" href="docs/navigation.html">Navigation</a></li><li><a style="margin-left:0;" class="" href="docs/performance.html">Performance</a></li><li><a style="margin-left:0;" class="" href="docs/upgrading.html">Upgrading</a></li><li><a style="margin-left:0;" class="" href="docs/platform-specific-code.html">Platform Specific Code</a></li><li><a style="margin-left:0;" class="" href="docs/gesture-responder-system.html">Gesture Responder System</a></li></ul></div><div class="nav-docs-section"><h3>Guides (iOS)</h3><ul><li><a style="margin-left:0;" class="" href="docs/native-modules-ios.html">Native Modules</a></li><li><a style="margin-left:0;" class="" href="docs/native-components-ios.html">Native UI Components</a></li><li><a style="margin-left:0;" class="" href="docs/linking-libraries-ios.html">Linking Libraries</a></li><li><a style="margin-left:0;" class="" href="docs/running-on-device-ios.html">Running On Device</a></li><li><a style="margin-left:0;" class="" href="docs/running-on-simulator-ios.html">Running On Simulator</a></li><li><a style="margin-left:0;" class="" href="docs/communication-ios.html">Communication between native and React Native</a></li></ul></div><div class="nav-docs-section"><h3>Guides (Android)</h3><ul><li><a style="margin-left:0;" class="" href="docs/native-modules-android.html">Native Modules</a></li><li><a style="margin-left:0;" class="" href="docs/native-components-android.html">Native UI Components</a></li><li><a style="margin-left:0;" class="" href="docs/running-on-device-android.html">Running On Device</a></li><li><a style="margin-left:0;" class="" href="docs/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="" href="docs/mapview.html">MapView</a></li><li><a style="margin-left:0;" class="" href="docs/modal.html">Modal</a></li><li><a style="margin-left:0;" class="" href="docs/navigator.html">Navigator</a></li><li><a style="margin-left:0;" class="" href="docs/navigatorios.html">NavigatorIOS</a></li><li><a style="margin-left:0;" class="active" href="docs/picker.html">Picker</a></li><li><a style="margin-left:0;" class="" href="docs/pickerios.html">PickerIOS</a></li><li><a style="margin-left:0;" class="" href="docs/progressbarandroid.html">ProgressBarAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/progressviewios.html">ProgressViewIOS</a></li><li><a style="margin-left:0;" class="" href="docs/refreshcontrol.html">RefreshControl</a></li><li><a style="margin-left:0;" class="" href="docs/scrollview.html">ScrollView</a></li><li><a style="margin-left:0;" class="" href="docs/segmentedcontrolios.html">SegmentedControlIOS</a></li><li><a style="margin-left:0;" class="" href="docs/slider.html">Slider</a></li><li><a style="margin-left:0;" class="" href="docs/sliderios.html">SliderIOS</a></li><li><a style="margin-left:0;" class="" href="docs/statusbar.html">StatusBar</a></li><li><a style="margin-left:0;" class="" href="docs/snapshotviewios.html">SnapshotViewIOS</a></li><li><a style="margin-left:0;" class="" href="docs/switch.html">Switch</a></li><li><a style="margin-left:0;" class="" href="docs/switchandroid.html">SwitchAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/switchios.html">SwitchIOS</a></li><li><a style="margin-left:0;" class="" href="docs/tabbarios.html">TabBarIOS</a></li><li><a style="margin-left:0;" class="" href="docs/tabbarios-item.html">TabBarIOS.Item</a></li><li><a style="margin-left:0;" class="" href="docs/text.html">Text</a></li><li><a style="margin-left:0;" class="" href="docs/textinput.html">TextInput</a></li><li><a style="margin-left:0;" class="" href="docs/toolbarandroid.html">ToolbarAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/touchablehighlight.html">TouchableHighlight</a></li><li><a style="margin-left:0;" class="" href="docs/touchablenativefeedback.html">TouchableNativeFeedback</a></li><li><a style="margin-left:0;" class="" href="docs/touchableopacity.html">TouchableOpacity</a></li><li><a style="margin-left:0;" class="" href="docs/touchablewithoutfeedback.html">TouchableWithoutFeedback</a></li><li><a style="margin-left:0;" class="" href="docs/view.html">View</a></li><li><a style="margin-left:0;" class="" href="docs/viewpagerandroid.html">ViewPagerAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/webview.html">WebView</a></li></ul></div><div class="nav-docs-section"><h3>apis</h3><ul><li><a style="margin-left:0;" class="" href="docs/actionsheetios.html">ActionSheetIOS</a></li><li><a style="margin-left:0;" class="" href="docs/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/intentandroid.html">IntentAndroid</a></li><li><a style="margin-left:0;" class="" href="docs/interactionmanager.html">InteractionManager</a></li><li><a style="margin-left:0;" class="" href="docs/layoutanimation.html">LayoutAnimation</a></li><li><a style="margin-left:0;" class="" href="docs/linking.html">Linking</a></li><li><a style="margin-left:0;" class="" href="docs/nativemethodsmixin.html">NativeMethodsMixin</a></li><li><a style="margin-left:0;" class="" href="docs/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/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/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="picker"></a>Picker <a class="hash-link" href="docs/picker.html#picker">#</a></h1><div><div><p>Renders the native picker component on iOS and Android. Example:</p><div class="prism language-javascript"><Picker
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selectedValue<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>language<span class="token punctuation">}</span>
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onValueChange<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">(</span>lang<span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></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>language<span class="token punctuation">:</span> lang<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">}</span><span class="token operator">></span>
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<Picker<span class="token punctuation">.</span>Item label<span class="token operator">=</span><span class="token string">"Java"</span> value<span class="token operator">=</span><span class="token string">"java"</span> <span class="token operator">/</span><span class="token operator">></span>
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<Picker<span class="token punctuation">.</span>Item label<span class="token operator">=</span><span class="token string">"JavaScript"</span> value<span class="token operator">=</span><span class="token string">"js"</span> <span class="token operator">/</span><span class="token operator">></span>
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<<span class="token operator">/</span>Picker<span class="token operator">></span></div></div><h3><a class="anchor" name="props"></a>Props <a class="hash-link" href="docs/picker.html#props">#</a></h3><div class="props"><div class="prop"><h4 class="propTitle"><a class="anchor" name="view"></a><a href="docs/view.html#props">View props...</a> <a class="hash-link" href="docs/picker.html#view">#</a></h4></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="onvaluechange"></a>onValueChange <span class="propType">function</span> <a class="hash-link" href="docs/picker.html#onvaluechange">#</a></h4><div><p>Callback for when an item is selected. This is called with the following parameters:
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- <code>itemValue</code>: the <code>value</code> prop of the item that was selected
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- <code>itemPosition</code>: the index of the selected item in this picker</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="selectedvalue"></a>selectedValue <span class="propType">any</span> <a class="hash-link" href="docs/picker.html#selectedvalue">#</a></h4><div><p>Value matching value of one of the items. Can be a string or an integer.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="style"></a>style <span class="propType">pickerStyleType</span> <a class="hash-link" href="docs/picker.html#style">#</a></h4></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="testid"></a>testID <span class="propType">string</span> <a class="hash-link" href="docs/picker.html#testid">#</a></h4><div><p>Used to locate this view in end-to-end tests.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="enabled"></a><span class="platform">android</span>enabled <span class="propType">bool</span> <a class="hash-link" href="docs/picker.html#enabled">#</a></h4><div><p>If set to false, the picker will be disabled, i.e. the user will not be able to make a
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selection.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="mode"></a><span class="platform">android</span>mode <span class="propType">enum('dialog', 'dropdown')</span> <a class="hash-link" href="docs/picker.html#mode">#</a></h4><div><p>On Android, specifies how to display the selection items when the user taps on the picker:</p><ul><li>'dialog': Show a modal dialog. This is the default.</li><li>'dropdown': Shows a dropdown anchored to the picker view</li></ul></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="prompt"></a><span class="platform">android</span>prompt <span class="propType">string</span> <a class="hash-link" href="docs/picker.html#prompt">#</a></h4><div><p>Prompt string for this picker, used on Android in dialog mode as the title of the dialog.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="itemstyle"></a><span class="platform">ios</span>itemStyle <span class="propType">itemStylePropType</span> <a class="hash-link" href="docs/picker.html#itemstyle">#</a></h4><div><p>Style to apply to each of the item labels.</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/Components/Picker/Picker.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/picker.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/PickerExample.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>
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const React <span class="token operator">=</span> <span class="token function">require<span class="token punctuation">(</span></span><span class="token string">'react'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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const ReactNative <span class="token operator">=</span> <span class="token function">require<span class="token punctuation">(</span></span><span class="token string">'react-native'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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const StyleSheet <span class="token operator">=</span> <span class="token function">require<span class="token punctuation">(</span></span><span class="token string">'StyleSheet'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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const UIExplorerBlock <span class="token operator">=</span> <span class="token function">require<span class="token punctuation">(</span></span><span class="token string">'UIExplorerBlock'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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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>
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const <span class="token punctuation">{</span>
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Picker<span class="token punctuation">,</span>
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Text<span class="token punctuation">,</span>
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TouchableWithoutFeedback<span class="token punctuation">,</span>
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<span class="token punctuation">}</span> <span class="token operator">=</span> ReactNative<span class="token punctuation">;</span><span class="token comment" spellcheck="true">
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// $FlowFixMe found when converting React.createClass to ES6
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</span>const Item <span class="token operator">=</span> Picker<span class="token punctuation">.</span>Item<span class="token punctuation">;</span>
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class <span class="token class-name">PickerExample</span> extends <span class="token class-name">React<span class="token punctuation">.</span>Component</span> <span class="token punctuation">{</span>
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static title <span class="token operator">=</span> <span class="token string">'<Picker>'</span><span class="token punctuation">;</span>
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static description <span class="token operator">=</span> <span class="token string">'Provides multiple options to choose from, using either a dropdown menu or a dialog.'</span><span class="token punctuation">;</span>
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state <span class="token operator">=</span> <span class="token punctuation">{</span>
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selected1<span class="token punctuation">:</span> <span class="token string">'key1'</span><span class="token punctuation">,</span>
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selected2<span class="token punctuation">:</span> <span class="token string">'key1'</span><span class="token punctuation">,</span>
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selected3<span class="token punctuation">:</span> <span class="token string">'key1'</span><span class="token punctuation">,</span>
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color<span class="token punctuation">:</span> <span class="token string">'red'</span><span class="token punctuation">,</span>
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mode<span class="token punctuation">:</span> Picker<span class="token punctuation">.</span>MODE_DIALOG<span class="token punctuation">,</span>
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<span class="token punctuation">}</span><span class="token punctuation">;</span>
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<span class="token function">render<span class="token punctuation">(</span></span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token keyword">return</span> <span class="token punctuation">(</span>
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<UIExplorerPage title<span class="token operator">=</span><span class="token string">"<Picker>"</span><span class="token operator">></span>
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<UIExplorerBlock title<span class="token operator">=</span><span class="token string">"Basic Picker"</span><span class="token operator">></span>
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<Picker
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style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>picker<span class="token punctuation">}</span>
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selectedValue<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>selected1<span class="token punctuation">}</span>
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onValueChange<span class="token operator">=</span><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>onValueChange<span class="token punctuation">.</span><span class="token function">bind<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">,</span> <span class="token string">'selected1'</span><span class="token punctuation">)</span><span class="token punctuation">}</span><span class="token operator">></span>
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<Item label<span class="token operator">=</span><span class="token string">"hello"</span> value<span class="token operator">=</span><span class="token string">"key0"</span> <span class="token operator">/</span><span class="token operator">></span>
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<Item label<span class="token operator">=</span><span class="token string">"world"</span> value<span class="token operator">=</span><span class="token string">"key1"</span> <span class="token operator">/</span><span class="token operator">></span>
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<<span class="token operator">/</span>Picker<span class="token operator">></span>
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<<span class="token operator">/</span>UIExplorerBlock<span class="token operator">></span>
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<UIExplorerBlock title<span class="token operator">=</span><span class="token string">"Disabled picker"</span><span class="token operator">></span>
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<Picker style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>picker<span class="token punctuation">}</span> enabled<span class="token operator">=</span><span class="token punctuation">{</span><span class="token boolean">false</span><span class="token punctuation">}</span> selectedValue<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>selected1<span class="token punctuation">}</span><span class="token operator">></span>
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<Item label<span class="token operator">=</span><span class="token string">"hello"</span> value<span class="token operator">=</span><span class="token string">"key0"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"world"</span> value<span class="token operator">=</span><span class="token string">"key1"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<<span class="token operator">/</span>Picker<span class="token operator">></span>
|
||
<<span class="token operator">/</span>UIExplorerBlock<span class="token operator">></span>
|
||
<UIExplorerBlock title<span class="token operator">=</span><span class="token string">"Dropdown Picker"</span><span class="token operator">></span>
|
||
<Picker
|
||
style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>picker<span class="token punctuation">}</span>
|
||
selectedValue<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>selected2<span class="token punctuation">}</span>
|
||
onValueChange<span class="token operator">=</span><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>onValueChange<span class="token punctuation">.</span><span class="token function">bind<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">,</span> <span class="token string">'selected2'</span><span class="token punctuation">)</span><span class="token punctuation">}</span>
|
||
mode<span class="token operator">=</span><span class="token string">"dropdown"</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"hello"</span> value<span class="token operator">=</span><span class="token string">"key0"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"world"</span> value<span class="token operator">=</span><span class="token string">"key1"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<<span class="token operator">/</span>Picker<span class="token operator">></span>
|
||
<<span class="token operator">/</span>UIExplorerBlock<span class="token operator">></span>
|
||
<UIExplorerBlock title<span class="token operator">=</span><span class="token string">"Picker with prompt message"</span><span class="token operator">></span>
|
||
<Picker
|
||
style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>picker<span class="token punctuation">}</span>
|
||
selectedValue<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>selected3<span class="token punctuation">}</span>
|
||
onValueChange<span class="token operator">=</span><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>onValueChange<span class="token punctuation">.</span><span class="token function">bind<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">,</span> <span class="token string">'selected3'</span><span class="token punctuation">)</span><span class="token punctuation">}</span>
|
||
prompt<span class="token operator">=</span><span class="token string">"Pick one, just one"</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"hello"</span> value<span class="token operator">=</span><span class="token string">"key0"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"world"</span> value<span class="token operator">=</span><span class="token string">"key1"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<<span class="token operator">/</span>Picker<span class="token operator">></span>
|
||
<<span class="token operator">/</span>UIExplorerBlock<span class="token operator">></span>
|
||
<UIExplorerBlock title<span class="token operator">=</span><span class="token string">"Picker with no listener"</span><span class="token operator">></span>
|
||
<Picker style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>picker<span class="token punctuation">}</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"hello"</span> value<span class="token operator">=</span><span class="token string">"key0"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"world"</span> value<span class="token operator">=</span><span class="token string">"key1"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<<span class="token operator">/</span>Picker<span class="token operator">></span>
|
||
<Text<span class="token operator">></span>
|
||
Cannot change the value of <span class="token keyword">this</span> picker because it doesn't update selectedValue<span class="token punctuation">.</span>
|
||
<<span class="token operator">/</span>Text<span class="token operator">></span>
|
||
<<span class="token operator">/</span>UIExplorerBlock<span class="token operator">></span>
|
||
<UIExplorerBlock title<span class="token operator">=</span><span class="token string">"Colorful pickers"</span><span class="token operator">></span>
|
||
<Picker
|
||
style<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">[</span>styles<span class="token punctuation">.</span>picker<span class="token punctuation">,</span> <span class="token punctuation">{</span>color<span class="token punctuation">:</span> <span class="token string">'white'</span><span class="token punctuation">,</span> backgroundColor<span class="token punctuation">:</span> <span class="token string">'#333'</span><span class="token punctuation">}</span><span class="token punctuation">]</span><span class="token punctuation">}</span>
|
||
selectedValue<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>color<span class="token punctuation">}</span>
|
||
onValueChange<span class="token operator">=</span><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>onValueChange<span class="token punctuation">.</span><span class="token function">bind<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">,</span> <span class="token string">'color'</span><span class="token punctuation">)</span><span class="token punctuation">}</span>
|
||
mode<span class="token operator">=</span><span class="token string">"dropdown"</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"red"</span> color<span class="token operator">=</span><span class="token string">"red"</span> value<span class="token operator">=</span><span class="token string">"red"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"green"</span> color<span class="token operator">=</span><span class="token string">"green"</span> value<span class="token operator">=</span><span class="token string">"green"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"blue"</span> color<span class="token operator">=</span><span class="token string">"blue"</span> value<span class="token operator">=</span><span class="token string">"blue"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<<span class="token operator">/</span>Picker<span class="token operator">></span>
|
||
<Picker
|
||
style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>picker<span class="token punctuation">}</span>
|
||
selectedValue<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>color<span class="token punctuation">}</span>
|
||
onValueChange<span class="token operator">=</span><span class="token punctuation">{</span><span class="token keyword">this</span><span class="token punctuation">.</span>onValueChange<span class="token punctuation">.</span><span class="token function">bind<span class="token punctuation">(</span></span><span class="token keyword">this</span><span class="token punctuation">,</span> <span class="token string">'color'</span><span class="token punctuation">)</span><span class="token punctuation">}</span>
|
||
mode<span class="token operator">=</span><span class="token string">"dialog"</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"red"</span> color<span class="token operator">=</span><span class="token string">"red"</span> value<span class="token operator">=</span><span class="token string">"red"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"green"</span> color<span class="token operator">=</span><span class="token string">"green"</span> value<span class="token operator">=</span><span class="token string">"green"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<Item label<span class="token operator">=</span><span class="token string">"blue"</span> color<span class="token operator">=</span><span class="token string">"blue"</span> value<span class="token operator">=</span><span class="token string">"blue"</span> <span class="token operator">/</span><span class="token operator">></span>
|
||
<<span class="token operator">/</span>Picker<span class="token operator">></span>
|
||
<<span class="token operator">/</span>UIExplorerBlock<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>
|
||
|
||
changeMode <span class="token operator">=</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>
|
||
const newMode <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>state<span class="token punctuation">.</span>mode <span class="token operator">===</span> Picker<span class="token punctuation">.</span>MODE_DIALOG
|
||
<span class="token operator">?</span> Picker<span class="token punctuation">.</span>MODE_DROPDOWN
|
||
<span class="token punctuation">:</span> Picker<span class="token punctuation">.</span>MODE_DIALOG<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>mode<span class="token punctuation">:</span> newMode<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>
|
||
|
||
onValueChange <span class="token operator">=</span> <span class="token punctuation">(</span>key<span class="token punctuation">:</span> string<span class="token punctuation">,</span> value<span class="token punctuation">:</span> string<span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">></span> <span class="token punctuation">{</span>
|
||
const newState <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
|
||
newState<span class="token punctuation">[</span>key<span class="token punctuation">]</span> <span class="token operator">=</span> value<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>newState<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 keyword">var</span> 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>
|
||
picker<span class="token punctuation">:</span> <span class="token punctuation">{</span>
|
||
width<span class="token punctuation">:</span> <span class="token number">100</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> PickerExample<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%22Picker%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/navigatorios.html#content">← Prev</a><a class="docs-next" href="docs/pickerios.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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