cupertino_scaffold_sample.dart

CupertinoPageScaffold(
        navigationBar: CupertinoNavigationBar(
          middle: Text(
            title,
            style: TextStyle(color: Colors.black),
          ),
          trailing: CupertinoButton(
            padding: EdgeInsets.only(top: 0, right: 16.0),
            child: Text(
              "Save",
              style: TextStyle(color: Color(Const.colorPrimary)),
            ),
            onPressed: savePressed,
          ),
        ),
        child: SafeArea(child: getUserDataWidget()),
      );