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initState method

void initState ()

<span class="feature">override</span>

<p>Called when this object is inserted into the tree.</p> <p>The framework will call this method exactly once for each <a href="https:api.flutter.dev/flutter/widgets/State-class.html">State</a> object it creates.</p> <p>Override this method to perform initialization that depends on the location at which this object was inserted into the tree (i.e., <a href="https:api.flutter.dev/flutter/widgets/State/context.html">context</a>) or on the widget used to configure this object (i.e., <a href="https:api.flutter.dev/flutter/widgets/State/widget.html">widget</a>).</p> <p>If a <a href="https:api.flutter.dev/flutter/widgets/State-class.html">State</a>'s <a href="../../widgets_post_widget/PostContainerState/build.md">build</a> method depends on an object that can itself change state, for example a <a href="https:api.flutter.dev/flutter/foundation/ChangeNotifier-class.html">ChangeNotifier</a> or <a href="https:api.flutter.dev/flutter/dart-async/Stream-class.html">Stream</a>, or some other object to which one can subscribe to receive notifications, then be sure to subscribe and unsubscribe properly in <a href="../../widgets_post_widget/PostContainerState/initState.md">initState</a>, <a href="https:api.flutter.dev/flutter/widgets/State/didUpdateWidget.html">didUpdateWidget</a>, and <a href="../../widgets_post_widget/PostContainerState/dispose.md">dispose</a>:</p> <ul> <li>In <a href="../../widgets_post_widget/PostContainerState/initState.md">initState</a>, subscribe to the object.</li> <li>In <a href="https:api.flutter.dev/flutter/widgets/State/didUpdateWidget.html">didUpdateWidget</a> unsubscribe from the old object and subscribe to the new one if the updated widget configuration requires replacing the object.</li> <li>In <a href="../../widgets_post_widget/PostContainerState/dispose.md">dispose</a>, unsubscribe from the object.</li> </ul> <p>You cannot use <a href="https:api.flutter.dev/flutter/widgets/BuildContext/dependOnInheritedWidgetOfExactType.html">BuildContext.dependOnInheritedWidgetOfExactType</a> from this method. However, <a href="https:api.flutter.dev/flutter/widgets/State/didChangeDependencies.html">didChangeDependencies</a> will be called immediately following this method, and <a href="https:api.flutter.dev/flutter/widgets/BuildContext/dependOnInheritedWidgetOfExactType.html">BuildContext.dependOnInheritedWidgetOfExactType</a> can be used there.</p> <p>Implementations of this method should start with a call to the inherited method, as in <code>super.initState()</code>.</p>

Implementation​

@override
void initState() \{
  super.initState();
\}