flutter setState切换脚手架bottomSheet

bool showBottomSheet = false; // 初始状态为隐藏

void toggleBottomSheet() {
  setState(() {
    showBottomSheet = !showBottomSheet; // 反转变量的值
  });
}

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text('Flutter BottomSheet Example'),
        ),
        body: Center(
          child: ElevatedButton(
            onPressed: toggleBottomSheet,
            child: Text('Toggle BottomSheet'),
          ),
        ),
        bottomSheet: showBottomSheet ? buildBottomSheet() : null, // 根据showBottomSheet变量决定是否显示bottomSheet
      ),
    );
  }

  Widget buildBottomSheet() {
    return Container(
      height: 200,
      color: Colors.white,
      child: Center(
        child: Text('This is a bottomSheet'),
      ),
    );
  }
}