Question

我正在尝试构建一个应用程序，以在颤动的应用程序上实现“用苹果登录”功能。它说Xcode发现了一个错误，但是没有错误文本。我试图运行“ flutter clean”和“ flutter build ios”，但没有任何帮助，在其他地方也找不到我的问题。 firebase身份验证已降级为较旧版本，因为最新版本和最新版本根本不起作用。我对此很陌生，所以我会全力以赴来解决此错误。

import 'dart:io';
import 'package:device_info/device_info.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:apple_sign_in/apple_sign_in.dart';
import 'package:cloud_firestore/cloud_firestore.dart';


void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
 @override
 _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
 @override
 Widget build(BuildContext context) {
   return MaterialApp(
     debugShowCheckedModeBanner: false,
     home: DiningHalls(),
   );
 }
}

class DiningHalls extends StatefulWidget {
 @override
 _DiningHallsState createState() => _DiningHallsState();
}

class _DiningHallsState extends State<DiningHalls> {
 @override

 bool supportsAppleSignIn = false;

 void initState() {
   // TODO: implement initState

   Firestore.instance.collection('FitTracker').document();

   super.initState();
   checkDevice();

}

checkDevice()async{
 if (Platform.isIOS) {
 var iosInfo = await DeviceInfoPlugin().iosInfo;
 var version = iosInfo.systemVersion;

 if (version.contains('13') == true) {
   supportsAppleSignIn = true;
 }
}
}



 @override
 Widget build(BuildContext context) {
   return Scaffold(
     body: Center(child: Column(
       children: <Widget>[
         Text("COVID-19"),
         Container(
 height: 300 / 15,
 width: 300 / 1.5,
 child: AppleSignInButton(
   style: ButtonStyle.black,
   type: ButtonType.continueButton,
   onPressed: () {
     initiateSignInWithApple();
         },
       ),
     )
             ],
           )),
         );
       }
     }

     void initiateSignInWithApple() async{
       final AuthorizationResult result = await AppleSignIn.performRequests([
 AppleIdRequest(requestedScopes: [Scope.email, Scope.fullName])
]);

       switch (result.status) {
 case AuthorizationStatus.authorized:

  // here we're going to sign in the user within firebase
  break;
 case AuthorizationStatus.error:
   // do something
   break;

 case AuthorizationStatus.cancelled:
   print('User cancelled');
   break;
}
      print("successfull sign in");
final AppleIdCredential appleIdCredential = result.credential;

OAuthProvider oAuthProvider =
   new OAuthProvider(providerId: "apple.com");
final AuthCredential credential = oAuthProvider.getCredential(
 idToken:
     String.fromCharCodes(appleIdCredential.identityToken),
 accessToken:
     String.fromCharCodes(appleIdCredential.authorizationCode),
);

final AuthResult res = await FirebaseAuth.instance
   .signInWithCredential(credential);

FirebaseAuth.instance.currentUser().then((val) async {
 UserUpdateInfo updateUser = UserUpdateInfo();
 updateUser.displayName =
     "${appleIdCredential.fullName.givenName} ${appleIdCredential.fullName.familyName}";
 updateUser.photoUrl =
     "define a photo url here"; 
 await val.updateProfile(updateUser);
});
}

尝试运行此Flutter项目时，这种“错误”是持久存在的，有什么想法吗？

0 个答案: