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地豆 提交于 2019-12-10 18:03 +08:00 . 初始化1.9
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<meta name="description" content="API docs for the createState method from the TextFormField class, for the Dart programming language.">
<title>createState method - TextFormField class - material library - Dart API</title>
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<li class="self-crumb">createState method</li>
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<div class="self-name">createState</div>
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<li class="self-crumb">createState method</li>
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<h5>TextFormField class</h5>
<ol>
<li class="section-title"><a href="material/TextFormField-class.html#constructors">Constructors</a></li>
<li><a href="material/TextFormField/TextFormField.html">TextFormField</a></li>
<li class="section-title">
<a href="material/TextFormField-class.html#instance-properties">Properties</a>
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<li class="inherited"><a href="widgets/FormField/autovalidate.html">autovalidate</a></li>
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<li class="inherited"><a href="widgets/FormField/enabled.html">enabled</a></li>
<li class="inherited"><a href="dart-core/Object/hashCode.html">hashCode</a></li>
<li class="inherited"><a href="widgets/FormField/initialValue.html">initialValue</a></li>
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<li class="inherited"><a href="widgets/FormField/onSaved.html">onSaved</a></li>
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<li class="section-title"><a href="material/TextFormField-class.html#instance-methods">Methods</a></li>
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<div><h1><span class="kind-method">createState</span> method</h1></div>
<section class="multi-line-signature">
<div>
<ol class="annotation-list">
<li>@override</li>
</ol>
</div>
<span class="returntype">_TextFormFieldState</span>
<span class="name ">createState</span>
(<wbr>)
<div class="features">override</div>
</section>
<section class="desc markdown">
<p>Creates the mutable state for this widget at a given location in the tree.</p>
<p>Subclasses should override this method to return a newly created
instance of their associated <a href="widgets/State-class.html">State</a> subclass:</p>
<pre class="language-dart"><code class="language-dart">@override
_MyState createState() =&gt; _MyState();
</code></pre>
<p>The framework can call this method multiple times over the lifetime of
a <a href="widgets/StatefulWidget-class.html">StatefulWidget</a>. For example, if the widget is inserted into the tree
in multiple locations, the framework will create a separate <a href="widgets/State-class.html">State</a> object
for each location. Similarly, if the widget is removed from the tree and
later inserted into the tree again, the framework will call <a href="material/TextFormField/createState.html">createState</a>
again to create a fresh <a href="widgets/State-class.html">State</a> object, simplifying the lifecycle of
<a href="widgets/State-class.html">State</a> objects.</p>
</section>
<section class="summary source-code" id="source">
<h2><span>Implementation</span></h2>
<pre class="language-dart"><code class="language-dart">@override
_TextFormFieldState createState() =&gt; _TextFormFieldState();</code></pre>
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