fix(mini): sync cached tab bars with the visible page

banban-mini/src/custom-tab-bar/index.tsx

@@ -1,6 +1,7 @@
 import { Image, Text, View } from '@tarojs/components'
-import Taro, { useDidShow } from '@tarojs/taro'
+import Taro from '@tarojs/taro'
-import { useState } from 'react'
+import { useSyncExternalStore } from 'react'
+import { getActiveTabRoute, subscribeTabBarRoute } from '@/utils/tab-bar'
 import './index.scss'
 
 const tabs = [
@@ -16,8 +17,7 @@ function currentRoute() {
 }
 
 export default function CustomTabBar() {
-  const [route, setRoute] = useState(currentRoute)
+  const route = useSyncExternalStore(subscribeTabBarRoute, getActiveTabRoute)
-  useDidShow(() => setRoute(currentRoute()))
   return (
     <View className='companion-tab-bar'>
       {tabs.map((tab) => {
@@ -26,8 +26,8 @@ export default function CustomTabBar() {
         return (
           <View key={tab.page} className={`companion-tab ${active ? 'active' : ''}`}
             onClick={() => {
-              if (active) return
+              if (currentRoute() === path) return
-              Taro.switchTab({ url: `/${path}`, success: () => setRoute(path) })
+              Taro.switchTab({ url: `/${path}` })
             }}>
             <Image className='companion-tab-icon' src={active ? tab.selected : tab.icon} mode='aspectFit' />
             <Text className='companion-tab-label'>{tab.label}</Text>

banban-mini/src/pages/chat/index.tsx

@@ -1,5 +1,6 @@
 import { getParticipantArtwork } from '@/utils/artwork'
 import { getPageStyle } from '@/utils/page-style'
+import { setActiveTabRoute } from '@/utils/tab-bar'
 import { View, Text, ScrollView, Image } from '@tarojs/components'
 import { useState } from 'react'
 import Taro, { useDidShow } from '@tarojs/taro'
@@ -15,6 +16,7 @@ export default function Chat() {
   const [isGuest, setIsGuest] = useState(false)
 
   useDidShow(() => {
+    setActiveTabRoute('pages/chat/index')
     void loadConversations()
   })
 

banban-mini/src/pages/device/index.tsx

@@ -1,4 +1,5 @@
 import { getPageStyle } from '@/utils/page-style'
+import { setActiveTabRoute } from '@/utils/tab-bar'
 import { View, Text, Slider, Image } from '@tarojs/components'
 import { useRef, useState } from 'react'
 import Taro, { useDidShow } from '@tarojs/taro'
@@ -140,6 +141,7 @@ export default function Device() {
   const volumeCommandInFlightRef = useRef(false)
 
   useDidShow(() => {
+    setActiveTabRoute('pages/device/index')
     void loadDeviceInfo()
   })
 

banban-mini/src/pages/location/index.tsx

@@ -1,4 +1,5 @@
 import { getPageStyle } from '@/utils/page-style'
+import { setActiveTabRoute } from '@/utils/tab-bar'
 import { View, Text, Map } from '@tarojs/components'
 import { useState } from 'react'
 import Taro, { useDidShow } from '@tarojs/taro'
@@ -139,6 +140,7 @@ export default function Location() {
   const [isGuest, setIsGuest] = useState(false)
 
   useDidShow(() => {
+    setActiveTabRoute('pages/location/index')
     void loadLocation(true)
   })
 

banban-mini/src/pages/sleep/index.tsx

@@ -1,6 +1,7 @@
 import FirmwareProgress from '@/components/firmware-progress'
 import { getRoleArtwork } from '@/utils/artwork'
 import { getPageStyle } from '@/utils/page-style'
+import { setActiveTabRoute } from '@/utils/tab-bar'
 import { View, Text, Image, Input, Button } from '@tarojs/components'
 import { useEffect, useRef, useState } from 'react'
 import Taro, { useDidHide, useDidShow, useShareAppMessage } from '@tarojs/taro'
@@ -130,6 +131,7 @@ export default function Sleep() {
   const isFirmwareStatusPollingRef = useRef(false)
 
   useDidShow(() => {
+    setActiveTabRoute('pages/sleep/index')
     void loadData()
   })
 

banban-mini/src/utils/tab-bar.ts

@@ -0,0 +1,21 @@
+export type TabBarRoute = 'pages/device/index' | 'pages/chat/index' | 'pages/location/index' | 'pages/sleep/index'
+
+// WeChat caches a separate custom tab bar for each page. All instances follow
+// the route reported by the visible page, including navigation from other UI.
+let activeRoute: TabBarRoute = 'pages/device/index'
+const listeners = new Set<() => void>()
+
+export function getActiveTabRoute(): TabBarRoute {
+  return activeRoute
+}
+
+export function subscribeTabBarRoute(listener: () => void): () => void {
+  listeners.add(listener)
+  return () => { listeners.delete(listener) }
+}
+
+export function setActiveTabRoute(route: TabBarRoute): void {
+  if (activeRoute === route) return
+  activeRoute = route
+  listeners.forEach((listener) => listener())
+}