fix bug

android/src/main/kotlin/com/jarvan/fluwx/handler/FluwxAuthHandler.kt

@@ -16,6 +16,7 @@
 package com.jarvan.fluwx.handler
 
 
+import android.util.Log
 import com.tencent.mm.opensdk.diffdev.DiffDevOAuthFactory
 import com.tencent.mm.opensdk.diffdev.OAuthErrCode
 import com.tencent.mm.opensdk.diffdev.OAuthListener

example/lib/auth_by_qr_code_page.dart

@@ -16,11 +16,12 @@ class _AuthByQRCodePageState extends State<AuthByQRCodePage> {
   void initState() {
     super.initState();
 
-    fluwx.onAuthByQRCodeFinished.listen((data) => {
+    fluwx.onAuthByQRCodeFinished.listen((data){
+        print("----finished");
           setState(() {
             _status =
                 "errorCode=>${data.errorCode}\nauthCode=>${data.authCode}";
-          })
+          });
         });
     fluwx.onAuthGotQRCode.listen((image) {
       setState(() {

lib/src/fluwx_iml.dart

@@ -302,9 +302,9 @@ Future subscribeMsg({
 }
 
 _handleOnAuthByQRCodeFinished(MethodCall methodCall) {
-  int errCode = methodCall.arguments("errCode");
+  int errCode = methodCall.arguments["errCode"];
   _authByQRCodeFinishedController.add(AuthByQRCodeResult(
-      methodCall.arguments("authCode"),
+      methodCall.arguments["authCode"],
       _authByQRCodeErrorCodes[errCode] ?? AuthByQRCodeErrorCode.UNKNOWN));
 }