监测ios白屏问题

lib/bloc/web_cubit.dart

@@ -63,6 +63,9 @@ class WebState extends Equatable {
 
 
   final String h5Version;
   final String h5Version;
 
 
+  /// 用于测试监测问题
+  final String testMsg;
+
   const WebState({
   const WebState({
     this.selectedIndex = 0,
     this.selectedIndex = 0,
     this.loaded = false,
     this.loaded = false,
@@ -87,6 +90,7 @@ class WebState extends Equatable {
     this.chooseVideoCmdFlag = false,
     this.chooseVideoCmdFlag = false,
     this.chooseVideoCmdMessage = '',
     this.chooseVideoCmdMessage = '',
     this.h5Version = '',
     this.h5Version = '',
+    this.testMsg = '',
   });
   });
 
 
   WebState copyWith({
   WebState copyWith({
@@ -114,6 +118,7 @@ class WebState extends Equatable {
     bool? chooseVideoCmdFlag,
     bool? chooseVideoCmdFlag,
     String? chooseVideoCmdMessage,
     String? chooseVideoCmdMessage,
     String? h5Version,
     String? h5Version,
+    String? testMsg,
   }) {
   }) {
     return WebState(
     return WebState(
       selectedIndex: selectedIndex ?? this.selectedIndex,
       selectedIndex: selectedIndex ?? this.selectedIndex,
@@ -139,6 +144,7 @@ class WebState extends Equatable {
       chooseVideoCmdFlag: chooseVideoCmdFlag ?? this.chooseVideoCmdFlag,
       chooseVideoCmdFlag: chooseVideoCmdFlag ?? this.chooseVideoCmdFlag,
       chooseVideoCmdMessage: chooseVideoCmdMessage ?? this.chooseVideoCmdMessage,
       chooseVideoCmdMessage: chooseVideoCmdMessage ?? this.chooseVideoCmdMessage,
       h5Version: h5Version ?? this.h5Version,
       h5Version: h5Version ?? this.h5Version,
+      testMsg: testMsg ?? this.testMsg,
     );
     );
   }
   }
 
 
@@ -167,6 +173,7 @@ class WebState extends Equatable {
         chooseVideoCmdFlag,
         chooseVideoCmdFlag,
         chooseVideoCmdMessage,
         chooseVideoCmdMessage,
         h5Version,
         h5Version,
+        testMsg,
       ];
       ];
 }
 }
 
 
@@ -1045,6 +1052,36 @@ class WebCubit extends Cubit<WebState> with WidgetsBindingObserver {
     _sendResponse(resp);
     _sendResponse(resp);
   }
   }
 
 
+  Future<void> _checkLocalServerStatus() async {
+    var localServerService = getIt.get<LocalServerService>();
+    var result = await localServerService.checkServerHealth();
+    if (!result) {
+      try {
+        // 安全起见，执行一次关闭旧的server，
+        _server?.close();
+      } catch (e) {
+        print('SocketException: $e');
+      }
+      emit(state.copyWith(testMsg: 'A ${DateTime.now()}'));
+      _server = await localServerService.restartLocalServer();
+    }
+  }
+
+  Future<void> _checkWebViewStatus() async {
+    try {
+      // 尝试获取页面标题来验证 WebView 是否响应
+      final title = await controller.runJavaScriptReturningResult('document.title');
+      if (title.toString().isEmpty) {
+        emit(state.copyWith(testMsg: 'C ${DateTime.now()}'));
+        _loadHtml();
+      }
+    } catch (e) {
+      // JavaScript 执行失败，可能 WebView 已失效
+      emit(state.copyWith(testMsg: 'B ${DateTime.now()}'));
+      _loadHtml();
+    }
+  }
+
   ///
   ///
   /// iOS：用于标识是初次启动，还是从后台恢复
   /// iOS：用于标识是初次启动，还是从后台恢复
   ///
   ///
@@ -1057,17 +1094,10 @@ class WebCubit extends Cubit<WebState> with WidgetsBindingObserver {
       if (lifecycleState == AppLifecycleState.resumed) {
       if (lifecycleState == AppLifecycleState.resumed) {
         if (_hasBeenResumed) {
         if (_hasBeenResumed) {
           // 代表从后台恢复
           // 代表从后台恢复
-          var localServerService = getIt.get<LocalServerService>();
-          var result = await localServerService.checkServerHealth();
-          if (!result) {
-            try {
-              // 安全起见，执行一次关闭旧的server，
-              _server?.close();
-            } catch (e) {
-              print('SocketException: $e');
-            }
-            _server = await localServerService.restartLocalServer();
-          }
+          // 1 检测本机Http服务
+          _checkLocalServerStatus();
+          // 2 检测WebView状态
+          _checkWebViewStatus();
         } else {
         } else {
           // 代表初次
           // 代表初次
           _hasBeenResumed = true;
           _hasBeenResumed = true;

lib/ui/pages/web_page.dart

@@ -138,7 +138,7 @@ class WebPage extends StatelessWidget {
 
 
   AppBar _buildAppBar(BuildContext ctx, WebState state) {
   AppBar _buildAppBar(BuildContext ctx, WebState state) {
     return AppBar(
     return AppBar(
-      title: Text(state.title, style: TextStyle(color: Color(state.titleColor), fontSize: 18)),
+      title: Text(state.title + state.testMsg, style: TextStyle(color: Color(state.titleColor), fontSize: 18)),
       centerTitle: true,
       centerTitle: true,
       automaticallyImplyLeading: false,
       automaticallyImplyLeading: false,
       backgroundColor: Color(state.bgColor),
       backgroundColor: Color(state.bgColor),