fix:bug scan

utils/wxsdk.js

@@ -1,16 +1,47 @@
 // utils/wxsdk.js —— 封装微信扫一扫 不用旧的了
 import { wechatApi } from '@/api/index.js'
 
-const wx = window.jWeixin
+const getWx = () => window.jWeixin || window.wx
+const entryUrl = window.__WX_ENTRY_URL__ || window.location.href.split('#')[0]
+let configPromise = null
+let configUrl = ''
+let configReady = false
+
+const isIOS = () => /iphone|ipad|ipod/i.test(navigator.userAgent)
+
+const getConfigUrl = () => {
+	// iOS 微信 WebView 的 JS-SDK 签名 URL 需要使用 SPA 首次进入的地址。
+	if (isIOS()) {
+		return entryUrl
+	}
+
+	return window.location.href.split('#')[0]
+}
 
 /**
  * 初始化微信 JS-SDK
  */
 export async function initWxConfig() {
-	const url = window.location.href.split('#')[0]
+	const wx = getWx()
+	if (!wx) {
+		throw new Error('微信 SDK 未加载')
+	}
+
+	const url = getConfigUrl()
 	console.log(url);
-	try {
-		const data = await wechatApi.getJssdkConfig(url)
+
+	if (configReady && configUrl === url) {
+		return
+	}
+
+	if (configPromise && configUrl === url) {
+		return configPromise
+	}
+
+	configUrl = url
+	configReady = false
+
+	configPromise = wechatApi.getJssdkConfig(url).then((data) => {
 		const { app_id, timestamp, nonce_str, signature } = data
 
 		return new Promise((resolve, reject) => {
@@ -24,24 +55,37 @@ export async function initWxConfig() {
 			})
 			wx.ready(() => {
 				console.log('微信 SDK 就绪')
+				configReady = true
 				resolve()
 			})
 			wx.error((err) => {
 				console.error('wx.config 失败', err)
+				configReady = false
+				configPromise = null
 				reject(err)
 			})
 		})
-	} catch (e) {
+	}).catch((e) => {
 		console.error('获取微信签名失败', e)
+		configPromise = null
+		configReady = false
 		throw e
-	}
+	})
+
+	return configPromise
 }
 
 /**
  * 调起微信扫一扫
  * @returns {Promise<string>}  扫码结果字符串
  */
-export function wxScan() {
+export async function wxScan() {
+	await initWxConfig()
+	const wx = getWx()
+	if (!wx) {
+		throw new Error('微信 SDK 未加载')
+	}
+
 	return new Promise((resolve, reject) => {
 		wx.scanQRCode({
 			needResult: 1,
@@ -63,4 +107,4 @@ export function wxScan() {
  */
 export function isInWechat() {
 	return /micromessenger/i.test(navigator.userAgent)
-}
+}