appBar: AppBar( elevation: 0.0, title: Text(gazung), backgroundColor: Color(0xffDBDDE0), ), drawer: Drawer( child: ListView( children: [

        DrawerHeader(
          decoration: BoxDecoration(
            color: Color(0xff9CA2B0),
          ),
          child: Text('2021-02 개정 기준'),
        ),

        ListTile(
          tileColor: Color(0xffDBDDE0),
          title: Text('2021-02 개정 기준'),
          onTap: (){
            setState(() {
              gazung = 'changedaapbartext';
            });

I output the title of the app bar as a variable called gazung and setstate in the drawer to change it, but it is not applied to the title of the appbar.

CodePudding user response：

You can try with this code, i did not get any issue.

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

  @override
  State<ApBarTest> createState() => _ApBarTestState();
}

class _ApBarTestState extends State<ApBarTest> {
  String gazung = 'Title';
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        elevation: 0.0,
        title: Text(gazung),
        backgroundColor: Color(0xffDBDDE0),
      ),
      drawer: Drawer(
        child: ListView(
          children: [
            DrawerHeader(
              decoration: BoxDecoration(
                color: Color(0xff9CA2B0),
              ),
              child: Text('2021-02 개정 기준'),
            ),
            ListTile(
                tileColor: Color(0xffDBDDE0),
                title: Text('2021-02 개정 기준'),
                onTap: () {
                  setState(() {
                    gazung = 'changedaapbartext';
                  });
                })
          ],
        ),
      ),
    );
  }
}