修复讲解列表返回导览首页

src/pages/explain/list.vue

@@ -79,6 +79,7 @@ type ExplainListHistoryState = {
 }
 
 let explainListHistoryPushed = false
+let isConsumingExplainListHistory = false
 let isReturningToGuideHome = false
 
 type PageStackEntry = {
@@ -96,6 +97,14 @@ const guideHomeUrl = () => (
   shouldUseHostNavigation.value ? guideTopTabUrl('guide') : GUIDE_HOME_URL
 )
 
+const isExplainListHistoryState = (state: unknown): state is ExplainListHistoryState => (
+  Boolean(
+    state
+    && typeof state === 'object'
+    && (state as ExplainListHistoryState).museumGuidePage === 'explain-list'
+  )
+)
+
 const showGuideHomeReturnError = () => {
   isReturningToGuideHome = false
   uni.showToast({
@@ -111,8 +120,22 @@ const reLaunchGuideHome = () => {
   })
 }
 
+const consumeExplainListHistory = () => {
+  if (
+    typeof window === 'undefined'
+    || !explainListHistoryPushed
+    || !isExplainListHistoryState(window.history.state)
+  ) return false
+
+  // 根栈压入了同 URL 标记，先消费它，避免回首页后再次回流到讲解列表。
+  isConsumingExplainListHistory = true
+  window.history.back()
+  return true
+}
+
 const returnToGuideHome = () => {
-  if (isReturningToGuideHome) return
+  if (isReturningToGuideHome || isConsumingExplainListHistory) return
+  if (consumeExplainListHistory()) return
 
   isReturningToGuideHome = true
   const pages = getPageStack()
@@ -138,14 +161,6 @@ const returnToGuideHome = () => {
   reLaunchGuideHome()
 }
 
-const isExplainListHistoryState = (state: unknown): state is ExplainListHistoryState => (
-  Boolean(
-    state
-    && typeof state === 'object'
-    && (state as ExplainListHistoryState).museumGuidePage === 'explain-list'
-  )
-)
-
 const pushExplainListHistory = () => {
   if (typeof window === 'undefined' || getPageStack().length > 1) return
   if (explainListHistoryPushed) return
@@ -168,10 +183,12 @@ const handleExplainListHistoryPopState = (event: PopStateEvent) => {
 
   if (isExplainListHistoryState(event.state)) {
     explainListHistoryPushed = true
+    isConsumingExplainListHistory = false
     return
   }
 
   explainListHistoryPushed = false
+  isConsumingExplainListHistory = false
   returnToGuideHome()
 }