Flutter widget life-cycle debug

Sample test

Nhan Cao

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1 min read

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Sep 9, 2020

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class HomeScreenBody extends StatefulWidget {
  const HomeScreenBody({Key key}) : super(key: key);@override
  _HomeScreenBodyState createState() => _HomeScreenBodyState();
}class _HomeScreenBodyState extends State<HomeScreenBody> {
  int value = 0;@override
  Widget build(BuildContext context) {
    return Column(
      children: <Widget>[
        FlatButton(
          onPressed: () async {
            setState(() {
              value++;
            });
          },
          child: const Text('Press me!'),
        ),
        TestWidget(value: value),
      ],
    );
  }
}class TestWidget extends StatefulWidget {
  final int value;const TestWidget({Key key, this.value}) : super(key: key);@override
  _TestWidgetState createState() => _TestWidgetState();
}class _TestWidgetState extends State<TestWidget> {
  @override
  Widget build(BuildContext context) {
    print('_TestWidgetState build');
    return Text('${widget.value}');
  }@override
  void initState() {
    super.initState();
    print('_TestWidgetState initState');
  }@override
  void didUpdateWidget(TestWidget oldWidget) {
    super.didUpdateWidget(oldWidget);
    print('_TestWidgetState didUpdateWidget');
  }@override
  void didChangeDependencies() {
    super.didChangeDependencies();
    print('_TestWidgetState…