lib/PersonalInfo.dart

@@ -1,7 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
-import 'package:persistent_bottom_nav_bar_v2/persistent_bottom_nav_bar_v2.dart';
-import 'package:shared_preferences/shared_preferences.dart';
 import 'package:topic/BottomNavBar.dart';
 import 'package:topic/main.dart';
 import 'package:topic/HomePage.dart';
@@ -111,19 +109,6 @@ class _PersonalInfoState extends State<PersonalInfo> {
     }
   }
 
-  void _loginOut() async {
-    SharedPreferences prefs = await SharedPreferences.getInstance();
-    // remove all data in share preference(user data which save to identify user or others)
-    prefs.clear();
-    // navbar router setting
-    // replace screen with LoginPage and without navbar
-    pushReplacementWithoutNavBar(
-        context,
-        MaterialPageRoute(
-          builder: (context) => LoginPage(),
-        ));
-  }
-
   //頁面
   @override
   Widget build(BuildContext context) {
@@ -223,9 +208,7 @@ class _PersonalInfoState extends State<PersonalInfo> {
                   width: 60,
                 ),
                 ElevatedButton(
-                  onPressed: () {
+                  onPressed: () {},
-                    _loginOut();
-                  },
                   child: Text('登出'),
                   style: TextButton.styleFrom(
                     backgroundColor: Color(0xFFF5E3C3),

lib/main.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
-import 'package:shared_preferences/shared_preferences.dart';
 import 'package:topic/HomePage.dart';
 import 'package:mysql_client/mysql_client.dart';
 import 'package:topic/RegisterPage.dart';
@@ -23,7 +22,6 @@ class _LoginPageState extends State<LoginPage> {
   void initState() {//初始化
     super.initState();
     _fetchData();//連資料庫
-    _CheckPreLoginInfo();//確定有先前有無登入
   }
 
   void _fetchData() async {
@@ -42,29 +40,6 @@ class _LoginPageState extends State<LoginPage> {
     await conn.connect();
   }
 
-  void _CheckPreLoginInfo() async{
-    SharedPreferences prefs = await SharedPreferences.getInstance();
-    //get user data from share preference else set empty to check not login before
-    String loginUserEmail = prefs.getString("email") ?? "";
-    //replace screen to HomePage if there are previous data in share preference
-    if(loginUserEmail != ""){
-      Navigator.pushReplacement(
-        context,
-        MaterialPageRoute(
-          builder: (context) => HomePage(
-            email: loginUserEmail,
-          ),
-        ),
-      );
-    }
-  }
-
-  void _setLoginInfo(String email) async{
-    //save user email into share preference to let app can auto login next open
-    SharedPreferences prefs = await SharedPreferences.getInstance();
-    prefs.setString("email", email);
-  }
-
   @override
   Widget build(BuildContext context) {
     debugPaintSizeEnabled=false;
@@ -205,7 +180,6 @@ class _LoginPageState extends State<LoginPage> {
         _emailController.clear();
         _ageController.clear();
         // 如果找到匹配的帳號，登入成功，跳轉到主頁
-        _setLoginInfo(email);
         Navigator.pushReplacement(
           context,
           MaterialPageRoute(

pubspec.yaml

@@ -41,7 +41,6 @@ dependencies:
   http: ^1.2.2
   webview_flutter: ^4.8.0
   persistent_bottom_nav_bar_v2: ^5.3.0
-  shared_preferences: ^2.2.3
 
 dev_dependencies:
   flutter_test: