diff --git a/lib/flutter_alibc.dart b/lib/flutter_alibc.dart
index f47b9e6..87665fe 100644
--- a/lib/flutter_alibc.dart
+++ b/lib/flutter_alibc.dart
@@ -47,17 +47,17 @@ class FlutterAlibc {
   /// @return: 成功则返回的data为用户信息，失败则没有data
   ///
   static Future<LoginModel> loginTaoBao() async {
-    Map result = await (_channel.invokeMethod("loginTaoBao") as FutureOr<Map<dynamic, dynamic>>);
+    Map? result = await _channel.invokeMethod("loginTaoBao");
     // 判断成功还是失败
-    if (result[AlibcConstKey.errorCode] != "0") {
+    if (result![AlibcConstKey.errorCode] != "0") {
       return LoginModel(
         result[AlibcConstKey.errorCode],
         result[AlibcConstKey.errorMessage],
       );
     }
     return LoginModel(result[AlibcConstKey.errorCode], result[AlibcConstKey.errorMessage],
-        data: UserModel(result[AlibcConstKey.data]["nick"], result[AlibcConstKey.data]["avatarUrl"], result[AlibcConstKey.data]["openId"], result[AlibcConstKey.data]["openSid"],
-            result[AlibcConstKey.data]["topAccessToken"], result[AlibcConstKey.data]["topAuthCode"]));
+        data: UserModel(result[AlibcConstKey.data]["nick"], result[AlibcConstKey.data]["avatarUrl"], result[AlibcConstKey.data]["openId"],
+            result[AlibcConstKey.data]["openSid"], result[AlibcConstKey.data]["topAccessToken"], result[AlibcConstKey.data]["topAuthCode"]));
   }
 
   ///