fix: 学习逻辑调整

src/pages/course/study.vue

@@ -750,7 +750,9 @@ const closeStudy = () => {
 }
 onHide(() => {
   changePlayItemId('')
-	closeStudy()
+	if(isPreview.value === 'S'){
+		closeStudy()
+	}
   // socketStore.closeSocket()
   //#ifdef APP-PLUS
   uni.offKeyboardHeightChange(setHeight)
@@ -767,21 +769,25 @@ onShow(() => {
   if (watchFlag.value === 1) return
   // getData('2');
   // initsocketTask()
-	sendMessage({
-	  commond: 'STDY',
-	  body: {
-	    crsId: crsId.value,
-	    teacherNo: choiceTeacher.value,
-	    studyType: isPreview.value ? 'P' : 'S',
-	    isContinue: isContinue.value,
-			stdyId: stdyId.value
-	  }
-	})
+	if(isPreview.value === 'S'){
+		sendMessage({
+			commond: 'STDY',
+			body: {
+				crsId: crsId.value,
+				teacherNo: choiceTeacher.value,
+				studyType: isPreview.value ? 'P' : 'S',
+				isContinue: isContinue.value,
+				stdyId: stdyId.value
+			}
+		})
+	}
 })
 const watchFlag = ref(1)
 onUnload(() => {
   console.log('onUnload')
-	closeStudy()
+	if(isPreview.value === 'S'){
+		closeStudy()
+	}
   // socketStore.closeSocket()
   changePlayItemId('')
   console.log(typeof teacherVoiceObj)