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href=/docs/actionsheetios>iOS APIs</a></div><ul class=menu__list><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-3 menu__list-item"><a class=menu__link tabindex=0 href=/docs/actionsheetios>ActionSheetIOS</a><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-3 menu__list-item"><a class=menu__link tabindex=0 href=/docs/dynamiccolorios>DynamicColorIOS</a><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-3 menu__list-item"><a class="menu__link menu__link--active" aria-current=page tabindex=0 href=/docs/settings>Settings</a></ul></ul></ul></nav></div></div></aside><main class=docMainContainer_a9sJ><div class="container padding-top--md padding-bottom--lg"><div class=row><div class="col docItemCol_Qr34"><div class=docItemContainer_tjFy><article><div class="tocCollapsible_wXna theme-doc-toc-mobile tocMobile_Ojys"><button type=button class="clean-btn tocCollapsibleButton_iI2p">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Settings</h1></header><p><code>Settings</code> serves as a wrapper for <a href=https://developer.apple.com/documentation/foundation/nsuserdefaults target=_blank rel="noopener noreferrer"><code>NSUserDefaults</code></a>, a persistent key-value store available only on iOS.</p>
5<h2 class="anchor anchorWithStickyNavbar_JmGV" id=example>Example<a href=#example class=hash-link aria-label="Direct link to Example" title="Direct link to Example"></a></h2>
6<div class=snack-player data-snack-name="Settings Example" data-snack-description="Example usage" data-snack-files="%7B%22App.tsx%22%3A%7B%22type%22%3A%22CODE%22%2C%22contents%22%3A%22import%20React%2C%20%7BuseState%7D%20from%20'react'%3B%5Cnimport%20%7BButton%2C%20Settings%2C%20StyleSheet%2C%20Text%7D%20from%20'react-native'%3B%5Cnimport%20%7BSafeAreaView%2C%20SafeAreaProvider%7D%20from%20'react-native-safe-area-context'%3B%5Cn%5Cnconst%20App%20%3D%20()%20%3D%3E%20%7B%5Cn%20%20const%20%5Bdata%2C%20setData%5D%20%3D%20useState(()%20%3D%3E%20Settings.get('data'))%3B%5Cn%5Cn%20%20return%20(%5Cn%20%20%20%20%3CSafeAreaProvider%3E%5Cn%20%20%20%20%20%20%3CSafeAreaView%20style%3D%7Bstyles.container%7D%3E%5Cn%20%20%20%20%20%20%20%20%3CText%3EStored%20value%3A%3C%2FText%3E%5Cn%20%20%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.value%7D%3E%7Bdata%7D%3C%2FText%3E%5Cn%20%20%20%20%20%20%20%20%3CButton%5Cn%20%20%20%20%20%20%20%20%20%20onPress%3D%7B()%20%3D%3E%20%7B%5Cn%20%20%20%20%20%20%20%20%20%20%20%20Settings.set(%7Bdata%3A%20'React'%7D)%3B%5Cn%20%20%20%20%20%20%20%20%20%20%20%20setData(Settings.get('data'))%3B%5Cn%20%20%20%20%20%20%20%20%20%20%7D%7D%5Cn%20%20%20%20%20%20%20%20%20%20title%3D%5C%22Store%20'React'%5C%22%5Cn%20%20%20%20%20%20%20%20%2F%3E%5Cn%20%20%20%20%20%20%20%20%3CButton%5Cn%20%20%20%20%20%20%20%20%20%20onPress%3D%7B()%20%3D%3E%20%7B%5Cn%20%20%20%20%20%20%20%20%20%20%20%20Settings.set(%7Bdata%3A%20'Native'%7D)%3B%5Cn%20%20%20%20%20%20%20%20%20%20%20%20setData(Settings.get('data'))%3B%5Cn%20%20%20%20%20%20%20%20%20%20%7D%7D%5Cn%20%20%20%20%20%20%20%20%20%20title%3D%5C%22Store%20'Native'%5C%22%5Cn%20%20%20%20%20%20%20%20%2F%3E%5Cn%20%20%20%20%20%20%3C%2FSafeAreaView%3E%5Cn%20%20%20%20%3C%2FSafeAreaProvider%3E%5Cn%20%20)%3B%5Cn%7D%3B%5Cn%5Cnconst%20styles%20%3D%20StyleSheet.create(%7B%5Cn%20%20container%3A%20%7B%5Cn%20%20%20%20flex%3A%201%2C%5Cn%20%20%20%20justifyContent%3A%20'center'%2C%5Cn%20%20%20%20alignItems%3A%20'center'%2C%5Cn%20%20%7D%2C%5Cn%20%20value%3A%20%7B%5Cn%20%20%20%20fontSize%3A%2024%2C%5Cn%20%20%20%20marginVertical%3A%2012%2C%5Cn%20%20%7D%2C%5Cn%7D)%3B%5Cn%5Cnexport%20default%20App%3B%22%7D%7D" data-snack-dependencies=react-native-safe-area-context data-snack-platform=web data-snack-supported-platforms=ios data-snack-theme=light data-snack-preview=true data-snack-loading=lazy data-snack-device-frame=false></div>
7<hr>
8<h1>Reference</h1>
9<h2 class="anchor anchorWithStickyNavbar_JmGV" id=methods>Methods<a href=#methods class=hash-link aria-label="Direct link to Methods" title="Direct link to Methods"></a></h2>
10<h3 class="anchor anchorWithStickyNavbar_JmGV" id=clearwatch><code>clearWatch()</code><a href=#clearwatch class=hash-link aria-label="Direct link to clearwatch" title="Direct link to clearwatch"></a></h3>
11<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>static</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>clearWatch</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">watchId</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token builtin" style=color:#2aa198>number</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div>
12<p><code>watchId</code> is the number returned by <code>watchKeys()</code> when the subscription was originally configured.</p>
13<hr>
14<h3 class="anchor anchorWithStickyNavbar_JmGV" id=get><code>get()</code><a href=#get class=hash-link aria-label="Direct link to get" title="Direct link to get"></a></h3>
15<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>static</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>get</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">key</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token builtin" style=color:#2aa198>string</span><span class="token punctuation" style=color:#657b83>)</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token builtin" style=color:#2aa198>any</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div>
16<p>Get the current value for a given <code>key</code> in <code>NSUserDefaults</code>.</p>
17<hr>
18<h3 class="anchor anchorWithStickyNavbar_JmGV" id=set><code>set()</code><a href=#set class=hash-link aria-label="Direct link to set" title="Direct link to set"></a></h3>
19<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>static</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>set</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">settings</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token maybe-class-name">Record</span><span class="token operator" style=color:#fc929e><</span><span class="token builtin" style=color:#2aa198>string</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token builtin" style=color:#2aa198>any</span><span class="token operator" style=color:#fc929e>></span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div>
20<p>Set one or more values in <code>NSUserDefaults</code>.</p>
21<hr>
22<h3 class="anchor anchorWithStickyNavbar_JmGV" id=watchkeys><code>watchKeys()</code><a href=#watchkeys class=hash-link aria-label="Direct link to watchkeys" title="Direct link to watchkeys"></a></h3>
23<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>static</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>watchKeys</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">keys</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token builtin" style=color:#2aa198>string</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>|</span><span class="token plain"> array</span><span class="token operator" style=color:#fc929e><</span><span class="token builtin" style=color:#2aa198>string</span><span class="token operator" style=color:#fc929e>></span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token function-variable function" style=color:#79b6f2>callback</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 arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>void</span><span class="token punctuation" style=color:#657b83>)</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token builtin" style=color:#2aa198>number</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div>
24<p>Subscribe to be notified when the value for any of the keys specified by the <code>keys</code> parameter has been changed in <code>NSUserDefaults</code>. Returns a <code>watchId</code> number that may be used with <code>clearWatch()</code> to unsubscribe.</p>
25<blockquote>
26<p><strong>Note:</strong> <code>watchKeys()</code> by design ignores internal <code>set()</code> calls and fires callback only on changes preformed outside of React Native code.</p>
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