Question

为什么切换到子页面后隐藏我的Boots导航栏？我希望在每个子页面或选定页面上都可以看到它，但是现在，单击子页面后，他开始了障碍，当我复出时，他仍然隐藏着

这是我的代码：

class _NavBarState extends State<NavBar> {
  final List<TitledNavigationBarItem> items = [
    TitledNavigationBarItem(title: 'Maps', icon: Icons.location_on),
    // TitledNavigationBarItem(title: 'SEARCH', icon: Icons.search),
    TitledNavigationBarItem(title: 'Home', icon: Icons.home),
    TitledNavigationBarItem(title: 'Profile', icon: Icons.person),
  ];

  int _selectedPage = 1;
  final List _pageOptions = [
    MapScreen(),
    HomeScreen(),
    ProfileScreen(),
  ];


  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: _pageOptions[_selectedPage],
      bottomNavigationBar: TitledBottomNavigationBar(
        onTap: (int index) {
            setState(() {
              _selectedPage = index;
            });
        },
        reverse: true,
        curve: Curves.easeInBack,
        items: items,
        currentIndex: _selectedPage,
        activeColor: Colors.red,
        inactiveColor: Colors.blueGrey,
      ),
    );
  }
}

问题是单击此ListTile之一后，单击后正确地将我转移到相应的子页面，但是当我返回到上一页时，我的底部导航栏不在此处，我也不知道为什么，

这是我从底部导航栏到子页面列表的3页之一：

class _ProfileScreenState extends State<ProfileScreen>{
  SharedPreferences sharedPreferences;
  UserApiService userApiService;

  @override
  void initState() {
    super.initState();
    checkStorageStatus();
    userApiService = UserApiService();
  }

  checkStorageStatus() async {
    sharedPreferences = await SharedPreferences.getInstance();
  }

  @override
  Widget build(BuildContext context) {
    double height = MediaQuery.of(context).size.height;
    double width = MediaQuery.of(context).size.width;
    return FutureBuilder<SharedPreferences>(
      future: SharedPreferences.getInstance(),
      builder: (context, snapshot){
        if(!snapshot.hasData){
          return Scaffold(
            body: CircularProgressIndicator(),
          );
        }
      return Scaffold(
      body: SingleChildScrollView(
        child: Container(
        padding: EdgeInsets.only(right: 30.0, top: 40.0),
        child: Padding(
          padding: EdgeInsets.only(top: 20, left:20, bottom: 20),
        child: Column(
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            Row(
              children: <Widget>[
                Padding(
                  padding: EdgeInsets.all(15.0),
                child: CircleAvatar(
                  radius: 40,
                  //TODO: użyć sharedpreferences na koncu by wstawialo faktyczne zdjecia
                  backgroundImage: NetworkImage('https://upload.wikimedia.org/wikipedia/commons/8/8d/George_Clooney_2016.jpg'),
                  backgroundColor: Colors.transparent,
                ),
                ),
                Column(
                  crossAxisAlignment: CrossAxisAlignment.start,
                  children: <Widget>[
                    Text(
                      sharedPreferences.getString('firstName') + ' ' + sharedPreferences.getString('lastName'),
                      style: TextStyle(
                        fontSize: 28,
                        fontWeight: FontWeight.bold
                      ),
                    ),
                    Text(
                      '#' + sharedPreferences.getString('accountName')
                    )
                  ],
                )
                ],
            ),
            SizedBox(height: 30.0),
            Divider(),
            Padding(
              padding: EdgeInsets.only(left:20, top: 20),
              child: Row(
                children: <Widget>[
                  Text(
                    'KONTO',
                    style: TextStyle(
                      fontWeight: FontWeight.bold,
                      color: Color.fromRGBO(136, 136, 136, 10)
                    ),
                  )
                ]
              )),
            SizedBox(height: 10.0),
            Padding(
              padding: EdgeInsets.only(bottom: 5.0),
              child: ListTile(
                leading: Icon(Icons.person, color: Colors.black, size: 30,),
                title: Text(
                  'Profil',
                  style: TextStyle(fontSize: 16.0,letterSpacing: 1.0, color: Colors.black,),
                ),
                trailing: Icon(Icons.arrow_forward_ios),
                onTap: () {
                  Navigator.push(context,
                    MaterialPageRoute(builder: (context) => UserScreen()));
                },
              ),
            ),

          ],
        )),
      )),
    );});
  }

和我的main.dart

import 'package:flutter/material.dart';
import 'package:prod_name/ui/login/login_screen.dart';
import 'package:prod_name/ui/start/start_screen.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: StartScreen(), // I WANT TO START APP WITH THIS SCREEN
    );
  }
}

如果您有任何问题，请回答，谢谢您

隐藏底部导航栏颤振

0 个答案: