高阶代码

牛

class RefreshIconWidgetDynamic extends StatefulWidget {
const RefreshIconWidgetDynamic({Key? key}) : super(key: key);
@override
State<StatefulWidget> createState() => RefreshIconWidgetDynamicState();
}
class RefreshIconWidgetDynamicState extends State<RefreshIconWidgetDynamic> {
double _angle = 0.0;
@override
Widget build(BuildContext context) {
return Transform.rotate(
angle: _angle,
child: Icon(
Icons.refresh,
color: readColor(),
size: 32,
),
);
}
void onPressed(double angle) {
setState(() => _angle = angle);
}
}