fix(weixin-sdk): fix iOS scanQRCode false camera permission error

Co-authored-by: Cursor <cursoragent@cursor.com>

packages/weixin-sdk/src/jssdk.ts

@@ -1,16 +1,14 @@
 import type { WechatJssdkConfig } from '@dukang/shared-types';
+import { isIosDevice, isWechatBrowser, isWechatDevTools } from './env';
 import { DEFAULT_JS_API_LIST } from './types';
 
 const JSSDK_URL = 'https://res.wx.qq.com/open/js/jweixin-1.6.0.js';
+const IOS_ENTRY_URL_KEY = 'dukang_wx_ios_entry_url';
 
 let scriptPromise: Promise<void> | null = null;
 let configured = false;
 let configuredUrl: string | null = null;
 
-function currentPageUrl() {
-  return typeof window !== 'undefined' ? normalizeJssdkPageUrl(window.location.href) : '';
-}
-
 /** 参与 JSSDK 签名的页面 URL（去掉 hash、OAuth 回跳参数） */
 export function normalizeJssdkPageUrl(rawUrl: string): string {
   try {
@@ -25,6 +23,33 @@ export function normalizeJssdkPageUrl(rawUrl: string): string {
   }
 }
 
+/** iOS 微信内 SPA：签名 URL 须用首次进入页面的入口 URL，而非路由跳转后的当前 URL */
+export function captureIosJssdkEntryUrl(): void {
+  if (typeof window === 'undefined') return;
+  if (!isIosDevice() || !isWechatBrowser() || isWechatDevTools()) return;
+  if (sessionStorage.getItem(IOS_ENTRY_URL_KEY)) return;
+  sessionStorage.setItem(IOS_ENTRY_URL_KEY, normalizeJssdkPageUrl(window.location.href));
+}
+
+/** 获取参与 JSSDK 签名的 URL */
+export function getJssdkSignUrl(rawUrl?: string): string {
+  const current = normalizeJssdkPageUrl(rawUrl ?? (typeof window !== 'undefined' ? window.location.href : ''));
+  if (typeof window !== 'undefined' && isIosDevice() && isWechatBrowser() && !isWechatDevTools()) {
+    const entry = sessionStorage.getItem(IOS_ENTRY_URL_KEY);
+    if (entry) return entry;
+  }
+  return current;
+}
+
+function isJssdkDebugEnabled(): boolean {
+  if (typeof window === 'undefined') return false;
+  try {
+    return new URLSearchParams(window.location.search).get('wxdebug') === '1';
+  } catch {
+    return false;
+  }
+}
+
 export function stripOAuthParamsFromLocation(): void {
   if (typeof window === 'undefined') return;
   const url = new URL(window.location.href);
@@ -77,8 +102,9 @@ export async function initWechatJssdk(options: {
   getAccessToken?: () => string | null;
   jsApiList?: string[];
 }): Promise<void> {
+  captureIosJssdkEntryUrl();
   const { apiBase, clientApp, getAccessToken } = options;
-  const pageUrl = options.url ?? currentPageUrl();
+  const pageUrl = options.url ?? getJssdkSignUrl();
   await loadScript();
   if (!window.wx) throw new Error('微信 JSSDK 不可用');
 
@@ -92,7 +118,7 @@ export async function initWechatJssdk(options: {
     window.wx!.config({
       ...config,
       jsApiList,
-      debug: false,
+      debug: isJssdkDebugEnabled(),
     });
     window.wx!.ready(() => {
       configured = true;
@@ -104,7 +130,8 @@ export async function initWechatJssdk(options: {
 }
 
 export function isJssdkReady(): boolean {
-  return configured && !!window.wx && configuredUrl === currentPageUrl();
+  const signUrl = getJssdkSignUrl();
+  return configured && !!window.wx && configuredUrl === signUrl;
 }
 
 export async function ensureJssdkReady(options: {
@@ -114,8 +141,13 @@ export async function ensureJssdkReady(options: {
   getAccessToken?: () => string | null;
   jsApiList?: string[];
 }): Promise<void> {
-  const pageUrl = options.url ?? currentPageUrl();
+  captureIosJssdkEntryUrl();
+  const pageUrl = options.url ?? getJssdkSignUrl();
   if (!isJssdkReady()) {
     await initWechatJssdk({ ...options, url: pageUrl });
   }
 }
+
+if (typeof window !== 'undefined') {
+  captureIosJssdkEntryUrl();
+}