修复小程序讲解页面返回回退

src/pages/explain/guide-stop-list.vue

@@ -20,13 +20,15 @@
 
 <script setup lang="ts">
 import { onUnmounted, ref } from 'vue'
-import { onLoad } from '@dcloudio/uni-app'
+import { onBackPress, onLoad } from '@dcloudio/uni-app'
 import GuidePageFrame from '@/components/navigation/GuidePageFrame.vue'
 import ExplainGuideStopCatalog, { type ExplainGuideStopCatalogItem } from '@/components/explain/ExplainGuideStopCatalog.vue'
 import { explainUseCase } from '@/usecases/explainUseCase'
 import type { ExplainGuideStop } from '@/domain/museum'
 import { normalizeExplainDetailTargetFromGuideStop } from '@/domain/explainDetailTarget'
 import { navigateToGuideTopTab, type GuideTopTab } from '@/utils/guideTopTabs'
+import { isEmbeddedInWechatMiniProgram } from '@/utils/hostEnvironment'
+import { returnToWechatMiniProgram } from '@/services/WechatMiniProgramBridgeService'
 
 const PAGE_SIZE = 20
 const selectedExplainHallId = ref('')
@@ -40,6 +42,7 @@ const hasMore = ref(false)
 const nextPageNo = ref(1)
 let requestVersion = 0
 let disposed = false
+let returningToMiniProgram = false
 
 const toGuideStopItems = (stops: ExplainGuideStop[]): ExplainGuideStopCatalogItem[] => stops.map((stop) => ({
   id: stop.id,
@@ -153,7 +156,7 @@ type ExplainPageStackEntry = {
   }
 }
 
-const returnToHallList = () => {
+const returnToHallList = async () => {
   const pages = getCurrentPages()
   const previousPage = pages[pages.length - 2] as ExplainPageStackEntry | undefined
   const previousRoute = previousPage?.route
@@ -170,11 +173,27 @@ const returnToHallList = () => {
     return
   }
 
+  if (isEmbeddedInWechatMiniProgram()) {
+    if (returningToMiniProgram) return
+    returningToMiniProgram = true
+    const result = await returnToWechatMiniProgram()
+    if (result.status === 'returned') return
+
+    returningToMiniProgram = false
+    uni.showToast({ title: '返回小程序失败，请重试', icon: 'none' })
+    return
+  }
+
   fallbackToHallList()
 }
 
-const handleBack = returnToHallList
+const handleBack = () => { void returnToHallList() }
 const handleTopTabChange = (tab: GuideTopTab) => navigateToGuideTopTab(tab)
+
+onBackPress(() => {
+  void returnToHallList()
+  return true
+})
 </script>
 
 <style scoped lang="scss">