diff --git a/README.md b/README.md
index 92e42f2..2beff79 100644
--- a/README.md
+++ b/README.md
@@ -10,4 +10,5 @@
 
 - [ ] 弹出键盘不遮挡输入框
 - [ ] 根据像素比例设置登录背景图片大小
-- [ ] 添加应用图标
\ No newline at end of file
+- [ ] 添加应用图标
+- [ ] 适配 iOS 登录失败 toast
\ No newline at end of file
diff --git a/src/ui/YooLoginUI.js b/src/ui/YooLoginUI.js
index 65dc767..d4fba19 100644
--- a/src/ui/YooLoginUI.js
+++ b/src/ui/YooLoginUI.js
@@ -7,6 +7,7 @@ import {
   TouchableOpacity,
   Text,
   ActivityIndicator,
+  ToastAndroid,
 } from 'react-native';
 
 const styles = StyleSheet.create({
@@ -52,15 +53,21 @@ export default class YooLoginUI extends Component {
       loading: false,
     };
     this.onButtonPress = this.onButtonPress.bind(this);
+    this.onLoginFailed = this.onLoginFailed.bind(this);
   }
 
   onButtonPress() {
     if (!this.state.loading) {
       this.setState({loading: true});
-      this.props.loginCallback();
+      this.props.loginCallback(this.onLoginFailed);
     }
   }
 
+  onLoginFailed() {
+    this.setState({loading: false});
+    ToastAndroid.show('登录失败', ToastAndroid.SHORT);
+  }
+
   render() {
     return (
       <View style={styles.container}>