The argument type 'ChatRoomAppBar' can't be assigned to the parameter type 'PreferredSizeWidget'
Scaffold(
appBar: MyAppBar(),
)
...
class MyAppBar extends StatelessWidget implements PreferredSizeWidget {
@override
Size get preferredSize => const Size.fromHeight(100);
@override
Widget build(BuildContext context) {
return Container(color: Colors.red);
}
}The argument type 'ResponsiveAppBar' can't be assigned to the parameter type 'PreferredSizeWidget?'.dart(argument_type_not_assignable)
Scaffold(
appBar: PreferredSize(
preferredSize: const Size.fromHeight(100),
child: Container(color: Colors.red),
),
)Copyright © 2021 Codeinu
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