未安装微信App时，选择微信登录、或跳转小程序时，进行相应提醒。

lib/data/repositories/message/open_weapp_handler.dart

@@ -7,6 +7,10 @@ class OpenWeappHandler extends MessageHandler {
 
   @override
   Future<bool> handleMessage(params) async {
+    if (!await _fluwx.isWeChatInstalled) {
+      throw Exception('设备上未安装微信App，不支持跳转打开微信小程序');
+    }
+
     if (params is! Map<String, dynamic>) {
       throw Exception('参数错误');
     }

lib/ui/pages/login_main_page.dart

 import 'package:appframe/bloc/login_main_cubit.dart';
+import 'package:appframe/config/locator.dart';
 import 'package:appframe/ui/widgets/login/login_page_agreed_widget.dart';
 import 'package:appframe/ui/widgets/login/login_page_header_widget.dart';
 import 'package:appframe/ui/widgets/login/login_page_image_widget.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:fluwx/fluwx.dart';
 
 class LoginMainPage extends StatelessWidget {
   const LoginMainPage({super.key});
@@ -86,8 +88,12 @@ class LoginMainPage extends StatelessWidget {
           width: double.infinity,
           height: 47,
           child: ElevatedButton(
-            onPressed: () {
+            onPressed: () async {
+              if (await getIt.get<Fluwx>().isWeChatInstalled) {
                 loginMainCubit.wechatAuth();
+              } else {
+                _noWechatLogin(context);
+              }
             },
             style: ElevatedButton.styleFrom(
               backgroundColor: Color(0xFF00CB60),
@@ -301,4 +307,25 @@ class LoginMainPage extends StatelessWidget {
       loginMainCubit.cancelAgreed();
     }
   }
+
+  void _noWechatLogin(BuildContext ctx) {
+    showDialog(
+      context: ctx,
+      barrierDismissible: false,
+      builder: (BuildContext context) {
+        return AlertDialog(
+          title: Text('温馨提示'),
+          content: Text('设备上未安装微信App，请选择其它登录方式'),
+          actions: <Widget>[
+            TextButton(
+              child: Text('关闭'),
+              onPressed: () {
+                Navigator.of(context).pop();
+              },
+            ),
+          ],
+        );
+      },
+    );
+  }
 }