微信登录时，增加loading

lib/bloc/login_main_cubit.dart

@@ -8,23 +8,33 @@ import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:fluwx/fluwx.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
-
 class LoginMainState extends Equatable {
   final bool agreed;
   final bool showAgreed;
+  final bool loading;
 
-  const LoginMainState({this.agreed = false, this.showAgreed = false});
+  const LoginMainState({
+    this.agreed = false,
+    this.showAgreed = false,
+    this.loading = false,
+  });
 
   @override
-  List<Object?> get props => [agreed, showAgreed];
+  List<Object?> get props => [
+        agreed,
+        showAgreed,
+        loading,
+      ];
 
   LoginMainState copyWith({
     bool? agreed,
     bool? showAgreed,
+    bool? loading,
   }) {
     return LoginMainState(
       agreed: agreed ?? this.agreed,
       showAgreed: showAgreed ?? this.showAgreed,
+      loading: loading ?? this.loading,
     );
   }
 }
@@ -67,6 +77,9 @@ class LoginMainCubit extends Cubit<LoginMainState> {
     if (!result) {
       throw Exception('微信授权处理失败');
     }
+
+    // 控制显示加载框
+    emit(state.copyWith(loading: true));
   }
 
   void goLoginPhone() {
@@ -98,7 +111,7 @@ class LoginMainCubit extends Cubit<LoginMainState> {
       sharedPreferences.setString('auth_stuId', stuId ?? '');
       sharedPreferences.setString('auth_ip', Constant.h5Server);
 
-      if(Constant.needIM){
+      if (Constant.needIM) {
         // IM登录， 正式使用时，需要从服务端获取用户签名
         var loginResult = await _imService.login(userCode);
         if (loginResult) {

lib/ui/pages/login_main_page.dart

@@ -14,7 +14,9 @@ class LoginMainPage extends StatelessWidget {
       create: (context) => LoginMainCubit(LoginMainState()),
       child: BlocConsumer<LoginMainCubit, LoginMainState>(builder: (context, state) {
         var loginMainCubit = context.read<LoginMainCubit>();
-        return Scaffold(
+        return Stack(
+          children: [
+            Scaffold(
               resizeToAvoidBottomInset: true,
               backgroundColor: Colors.white,
               body: SafeArea(
@@ -36,7 +38,6 @@ class LoginMainPage extends StatelessWidget {
                           crossAxisAlignment: CrossAxisAlignment.start,
                           children: [
                             SizedBox(height: 30),
-                        // _buildHeader(),
                             LoginPageHeaderWidget(),
                             SizedBox(height: 25),
                             _buildLoginButtons(context, loginMainCubit, state.agreed),
@@ -49,6 +50,25 @@ class LoginMainPage extends StatelessWidget {
                   ],
                 )),
               ),
+            ),
+            state.loading
+                ? Container(
+                    color: Colors.black54,
+                    width: MediaQuery.of(context).size.width,
+                    child: Center(
+                      child: Column(
+                        mainAxisAlignment: MainAxisAlignment.center,
+                        children: [
+                          CircularProgressIndicator(
+                            color: Color(0xFF7691FA),
+
+                          ),
+                        ],
+                      ),
+                    ),
+                  )
+                : SizedBox(),
+          ],
         );
       }, listener: (context, state) {
         if (state.showAgreed) {
@@ -58,31 +78,6 @@ class LoginMainPage extends StatelessWidget {
     );
   }
 
-  Widget _buildHeader() {
-    return Column(
-      mainAxisAlignment: MainAxisAlignment.start,
-      crossAxisAlignment: CrossAxisAlignment.start,
-      children: [
-        Text(
-          '欢迎登录',
-          style: TextStyle(
-            fontSize: 25,
-            fontWeight: FontWeight.bold,
-            color: Colors.black87,
-          ),
-        ),
-        SizedBox(height: 6),
-        Text(
-          '班小二，班级群必备效率工具',
-          style: TextStyle(
-            fontSize: 14,
-            color: Colors.black87,
-          ),
-        ),
-      ],
-    );
-  }
-
   Widget _buildLoginButtons(BuildContext context, LoginMainCubit loginMainCubit, bool agreed) {
     return Column(
       children: [