成功注册后屏幕未加载颤动

Question

成功注册后，应用程序验证不会呈现到下一个屏幕（通常显示“无数据”）。 我想在成功注册后重定向到包含 Gridview 的下一页。

这样做的最佳方法是什么？谢谢！

代码第一屏：

void _register() async {
    setState(() {
      _isLoading = true;
    });
    var data = {
      'name': nameController.text,
      'surname': surnameController.text,
      'gender': genderController.text,
      'birthdate': birthdateController.text,
      'email': emailController.text,
      'password': passwordController.text,
      'password_confirmation': password_ConfirmationController.text,
      'phone': phoneController.text,
    };
    var res = await Network().authData(data, '/auth/register');
    var body = json.decode(res.body);

    if (body['code'] == 0) {
      SharedPreferences localStorage = await SharedPreferences.getInstance();
      localStorage.setString('access_token', json.encode(body['access_token']));
      localStorage.setString('user', json.encode(body['user']));
      Navigator.push(
        context,
        new MaterialPageRoute(builder: (context) => Menu()),
      );
     
    } else {

      _showMsg(body['message']);
    }

    setState(() {
      _isLoading = false;
    });
  }
}

第二屏菜单中的代码（希望注册后出现）：

body: Center(
          child: FutureBuilder<List<dynamic>>(
              future: getJokes(),
              builder: (BuildContext context, AsyncSnapshot snapshot) {
                switch (snapshot.connectionState) {
                  case ConnectionState.none:
                    return Text('none');
                  case ConnectionState.waiting:
                    return Center(child: CircularProgressIndicator());
                  case ConnectionState.active:
                    return Text('salut');
                  case ConnectionState.done:
                    if (snapshot.hasError) {
                      return Text(
                        '${snapshot.error.toString()}',
                        style: TextStyle(color: Colors.red),
                      );
                    } else {
                      if (!snapshot.hasData) {
                        return Text('no data');
                      } else {}
                      return GridView.builder(
                          itemCount: snapshot.data.length,
                          gridDelegate:
                              SliverGridDelegateWithFixedCrossAxisCount(
                            crossAxisCount: 2,
                            childAspectRatio: 0.6,
                            mainAxisSpacing: 6.0,
                            crossAxisSpacing: 6.0,
                          ),
                          itemBuilder: (BuildContext context, int index) {
                            String pic = snapshot.data[index]['picture1'];
                            String price = snapshot.data[index]['price'];
                            String size = snapshot.data[index]['size'];
                            
                            int id =
                                int.parse('${snapshot.data[index]['user_id']}');
                           
                            String ownerpic =
                                snapshot.data[index]['ownerpicture'];
                            return Card(
                              color: Colors.grey[100],
                              child: Padding(
                                padding: EdgeInsets.only(
                                    left: 10.0,
                                    right: 10.0,
                                    bottom: 10.0,
                                    top: 10.0),
                                child: Container(
                                  alignment: Alignment.center,
                                  child: Column(
                                    crossAxisAlignment:
                                        CrossAxisAlignment.start,
                                    children: <Widget>[
                                      Row(
                                        children: [
                                          Positioned(
                                            top: 50,
                                            right: 100,

                                            child: InkWell(
                                              onTap: () {
                                                Navigator.push(
                                                  context,
                                                  MaterialPageRoute(
                                                      builder: (context) =>
                                                          UserProfile(
                                                            id: id,
                                                          )),
                                                );
                                               
                                              },
                                              child: CircleAvatar(
                                                radius: 12.0,
                                                backgroundImage: NetworkImage(
                                                  "http://192.*.*.*/users_images/$ownerpic",
                                                  headers: {
                                                    "authorization":
                                                        "Bearer $token",

                                                    
                                                  },
                                                ),
                                              ),
                                            ),