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lib/pages/student/room/video/teacher_video.dart

@@ -54,15 +54,18 @@ class TeacherVideo extends StatelessWidget {
             Positioned(
               top: 30,
               left: 10,
-              child: Container(
-                width: 200,
-                color: Colors.black,
-                child: AspectRatio(
-                  aspectRatio: 16 / 9,
-                  child: AgoraVideoView(
-                    controller: VideoViewController(
-                      rtcEngine: vm.engine!,
-                      canvas: const VideoCanvas(uid: 0),
+              child: Visibility(
+                visible: !vm.cameraClose,
+                child: Container(
+                  width: 200,
+                  color: Colors.black,
+                  child: AspectRatio(
+                    aspectRatio: 16 / 9,
+                    child: AgoraVideoView(
+                      controller: VideoViewController(
+                        rtcEngine: vm.engine!,
+                        canvas: const VideoCanvas(uid: 0),
+                      ),
                     ),
                   ),
                 ),

lib/pages/student/room/viewmodel/stu_room_vm.dart

@@ -103,6 +103,7 @@ class StuRoomVM extends ChangeNotifier {
     //启动连接
     await _ws.connect();
     //
+    _sub?.cancel();
     _sub = _ws.stream.listen((msg) {
       //自习室人员变化，同时也设置房间是否开了
       if (msg.event == RoomEvent.changeUser) {