update

src/views/Student/index.vue

@@ -2311,6 +2311,16 @@ const openChoiceQuestionDetail = (index:number) => {
   }
 }
 
+const handlePageUnload = () => {
+  if (isCreator.value && timerIndicator.value.visible) {
+    sendMessage({ type: 'timer_stop', courseid: props.courseid })
+  }
+  // 创建老师刷新/关闭页面时，清空激光笔共享状态
+  if (isCreator.value) {
+    clearLaserState()
+  }
+}
+
 onMounted(() => {
   document.addEventListener('keydown', handleKeydown)
 
@@ -2388,15 +2398,32 @@ onMounted(() => {
   }
 
   // 创建人离开页面时，广播停止计时
-  window.addEventListener('beforeunload', () => {
-    if (isCreator.value && timerIndicator.value.visible) {
-      sendMessage({ type: 'timer_stop', courseid: props.courseid })
-    }
-    // 创建老师刷新/关闭页面时，清空激光笔共享状态
-    if (isCreator.value) {
+ 
+  
+  // beforeunload 事件（页面刷新或关闭）
+  window.addEventListener('beforeunload', handlePageUnload)
+  
+  // visibilitychange 事件（适用于 iframe 嵌套场景，当外层页面返回时触发）
+  const handleVisibilityChange = () => {
+    if (document.hidden && isCreator.value) {
+      // 页面被隐藏时，清空激光笔状态
       clearLaserState()
+      if (timerIndicator.value.visible) {
+        sendMessage({ type: 'timer_stop', courseid: props.courseid })
+      }
     }
-  })
+  }
+  document.addEventListener('visibilitychange', handleVisibilityChange)
+  
+  // pagehide 事件（作为补充，某些浏览器中比 beforeunload 更可靠）
+  window.addEventListener('pagehide', handlePageUnload)
+  
+  // 存储清理函数，方便在 onUnmounted 中移除
+  ;(window as any).__pptistStudentUnloadHandlers = {
+    beforeunload: handlePageUnload,
+    visibilitychange: handleVisibilityChange,
+    pagehide: handlePageUnload
+  }
 })
 
 
@@ -2422,6 +2449,15 @@ onUnmounted(() => {
     providerSocket.value = null
   }
 
+  // 清理页面卸载相关的事件监听器
+  if ((window as any).__pptistStudentUnloadHandlers) {
+    const handlers = (window as any).__pptistStudentUnloadHandlers
+    window.removeEventListener('beforeunload', handlers.beforeunload)
+    document.removeEventListener('visibilitychange', handlers.visibilitychange)
+    window.removeEventListener('pagehide', handlers.pagehide)
+    delete (window as any).__pptistStudentUnloadHandlers
+  }
+
   // 清理window上的引用
   if ((window as any).PPTistStudent) {
     delete (window as any).PPTistStudent
@@ -2431,6 +2467,8 @@ onUnmounted(() => {
     clearInterval(timerInterval.value)
     timerInterval.value = null
   }
+
+  handlePageUnload()
 })
 
 // 手动重连