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</script></nav></div><div class="container mainContainer"><div class="wrapper"><div class="post"><header class="postHeader"><a class="edit-page-link button" href="https://github.com/facebook/react-native-website/blob/master/docs/maskedviewios.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 class="postHeaderTitle">MaskedViewIOS</h1></header><article><div><span><p>Renders the child view with a mask specified in the <code>maskElement</code> prop.</p>
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<pre><code class="hljs"><span class="hljs-keyword">import</span> React <span class="hljs-keyword">from</span> <span class="hljs-string">'react'</span>;
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<span class="hljs-keyword">import</span> { MaskedView, Text, View } <span class="hljs-keyword">from</span> <span class="hljs-string">'react-native'</span>;
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<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">MyMaskedView</span> <span class="hljs-keyword">extends</span> <span class="hljs-title">React</span>.<span class="hljs-title">Component</span> </span>{
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render() {
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<span class="hljs-keyword">return</span> (
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<span class="xml"><span class="hljs-tag"><<span class="hljs-name">MaskedView</span>
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<span class="hljs-attr">style</span>=<span class="hljs-string">{{</span> <span class="hljs-attr">flex:</span> <span class="hljs-attr">1</span> }}
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<span class="hljs-attr">maskElement</span>=<span class="hljs-string">{</span>
|
||
<<span class="hljs-attr">View</span> <span class="hljs-attr">style</span>=<span class="hljs-string">{styles.maskContainerStyle}</span>></span>
|
||
<span class="hljs-tag"><<span class="hljs-name">Text</span> <span class="hljs-attr">style</span>=<span class="hljs-string">{styles.maskTextStyle}</span>></span>
|
||
Basic Mask
|
||
<span class="hljs-tag"></<span class="hljs-name">Text</span>></span>
|
||
<span class="hljs-tag"></<span class="hljs-name">View</span>></span>
|
||
}
|
||
>
|
||
<span class="hljs-tag"><<span class="hljs-name">View</span> <span class="hljs-attr">style</span>=<span class="hljs-string">{{</span> <span class="hljs-attr">flex:</span> <span class="hljs-attr">1</span>, <span class="hljs-attr">backgroundColor:</span> '<span class="hljs-attr">blue</span>' }} /></span>
|
||
<span class="hljs-tag"></<span class="hljs-name">MaskedView</span>></span>
|
||
);
|
||
}
|
||
}
|
||
</span></code></pre>
|
||
<p>The above example will render a view with a blue background that fills its parent, and then mask that view with text that says "Basic Mask".</p>
|
||
<p>The alpha channel of the view rendered by the <code>maskElement</code> prop determines how much of the view's content and background shows through. Fully or partially opaque pixels allow the underlying content to show through but fully transparent pixels block that content.</p>
|
||
<h3><a class="anchor" aria-hidden="true" id="props"></a><a href="#props" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Props</h3>
|
||
<ul>
|
||
<li><a href="/react-native/docs/0.48/view#props">View props...</a></li>
|
||
</ul>
|
||
<ul>
|
||
<li><a href="maskedviewios.md#children"><code>children</code></a></li>
|
||
<li><a href="maskedviewios.md#maskelement"><code>maskElement</code></a></li>
|
||
</ul>
|
||
<hr>
|
||
<h1><a class="anchor" aria-hidden="true" id="reference"></a><a href="#reference" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Reference</h1>
|
||
<h2><a class="anchor" aria-hidden="true" id="props-1"></a><a href="#props-1" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Props</h2>
|
||
<h3><a class="anchor" aria-hidden="true" id="children"></a><a href="#children" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>children</code></h3>
|
||
<table>
|
||
<thead>
|
||
<tr><th>Type</th><th>Required</th></tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr><td>any</td><td>Yes</td></tr>
|
||
</tbody>
|
||
</table>
|
||
<hr>
|
||
<h3><a class="anchor" aria-hidden="true" id="maskelement"></a><a href="#maskelement" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a><code>maskElement</code></h3>
|
||
<p>Should be a React element to be rendered and applied as the mask for the child element.</p>
|
||
<table>
|
||
<thead>
|
||
<tr><th>Type</th><th>Required</th></tr>
|
||
</thead>
|
||
<tbody>
|
||
<tr><td>React.Element<*></td><td>Yes</td></tr>
|
||
</tbody>
|
||
</table>
|
||
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