diff --git a/README.md b/README.md
index 91a6b91..41105cc 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,8 @@ alipay_sdk=alipay-sdk-java-dynamicVersionNo&app_id=xxxxxxxxxxxxxxxx&biz_content=
 
 ### 支付宝返回应用 iOS 设置
 
+> ⚠️ 如果用户从 `支付宝App` 跳转到 `商家APP`，是通过系统功能切换，而不是通过 `支付宝APP` 功能键返回 `商家APP`，回调函数是不起作用的，可通过 [`AppState.addEventListener`](https://github.com/uiwjs/react-native-uiwjs-alipay/blob/b8b5b3e6e53bb23d1503cd9c565ad8f2132e2404/example/App.js#L6-L24) 监听事件来请求后台 API，来优化这一用户体验。
+
 1. 在代码中设置支付宝 `URL Schemes`，下面实例为 `ap2021001172656340` 为定义的 `scheme`
 
 ```js
diff --git a/example/App.js b/example/App.js
index ce15ca4..4d54a69 100644
--- a/example/App.js
+++ b/example/App.js
@@ -10,10 +10,10 @@ export default class App extends Component {
   componentWillUnmount(){
     AppState.removeEventListener('change', this._handleAppStateChange)
   }
-  // 2020-07-08 20:56:14.081 [info][tid:com.facebook.react.JavaScript] 'nextAppState:', 'inactive'
-  // 2020-07-08 20:56:14.947 [info][tid:com.facebook.react.JavaScript] 'nextAppState:', 'background'
-  // 2020-07-08 20:56:42.580 [info][tid:com.facebook.react.JavaScript] 'nextAppState:', 'active'
-  // 2020-07-08 20:56:42.633 [info][tid:com.facebook.react.JavaScript] 'nextAppState:res:', null
+  // [info][tid:com.facebook.react.JavaScript] 'nextAppState:', 'inactive'
+  // [info][tid:com.facebook.react.JavaScript] 'nextAppState:', 'background'
+  // [info][tid:com.facebook.react.JavaScript] 'nextAppState:', 'active'
+  // [info][tid:com.facebook.react.JavaScript] 'nextAppState:res:', null
   _handleAppStateChange = (nextAppState) => {
     console.log('nextAppState:', nextAppState)
     if(nextAppState==='active'){