Answers for "common widget flutter"

3

flutter inhereted widget

class MyInherited extends InheritedWidget {
  const MyInherited({
    Key? key,
    required Widget child,
  }) : super(key: key, child: child);


  // Here be dragons: null check (!) used, but if there's no
  // MyInhereted over where you used it this will throw.
  static MyInherited of(BuildContext context) {
    return context.dependOnInheritedWidgetOfExactType<MyInherited>()!;
  }

  //if you have properties, it should look something like:
  // bool updateShouldNotify(MyInherited old) => old.prop !== new.prop;
  
  //if you don't: 
  @override
  bool updateShouldNotify(MyInherited old) => false;
}
Posted by: Guest on December-03-2020
4

flutter stateful widget

class YellowBird extends StatefulWidget {
  const YellowBird({ Key key }) : super(key: key);

  @override
  _YellowBirdState createState() => _YellowBirdState();
}

class _YellowBirdState extends State<YellowBird> {
  @override
  Widget build(BuildContext context) {
    return Container(color: const Color(0xFFFFE306));
  }
}
Posted by: Guest on May-10-2020

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