Importance of Calling SetState inside initState

The initState method is called once when the widget is inserted into the tree. It’s used to initialize variables and perform other setup tasks that need to happen once, when the widget is created.

It’s important to call setState inside initState because it triggers a rebuild of the widget and ensures that any changes made to the widget’s state during initState will be reflected in the UI.

If you don’t call setState after making changes to the state inside initState, the changes won’t be reflected in the UI, and you may encounter bugs or unexpected behavior.

Here’s an example of calling setState inside initState:

class MyWidget extends StatefulWidget {
  @override
  _MyWidgetState createState() => _MyWidgetState();
}

class _MyWidgetState extends State<MyWidget> {
  int _counter = 0;

  @override
  void initState() {
    super.initState();
    _counter = 1;
    setState(() {});
  }

  @override
  Widget build(BuildContext context) {
    return Text('Counter: $_counter');
  }
}

In this example, _counter is initialized to 1 in initState, and setState is called to trigger a rebuild of the widget. This ensures that the change to _counter will be reflected in the UI.