支架需要将实现PreferredSizeWidget的类作为appbar
将您的自定义应用栏包装到PreferredSize
Scaffold(
appBar: PreferredSize(
preferredSize: const Size.fromHeight(100),
child: Container(color: Colors.red),
),
)
or implementPreferredSizeWidget:
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);
}
}
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