Flutter Firebase 苹果登录不工作 ios

Question

我正在尝试使用以下代码设置苹果登录。 点击按钮时没有任何反应。

我收到以下错误：

NoSuchMethodError (NoSuchMethodError: The method '[]' was called on null.
Receiver: null
Tried calling: []("User"))

新用户出现在 firebase 身份验证中，但除此之外该应用程序不起作用。

我已经在 xcode 和 developer.apple.com 中启用了使用苹果登录。 我也曾尝试在 xcode 中重新下载我的配置文件，但没有成功。

我在 firebase 中启用了苹果登录。

有谁知道如何解决这一问题？

mixin AuthenticationApple {
  static String generateNonce([int length = 32]) {
    const charset =
        '0123456789ABCDEFGHIJKLMNOPQRSTUVXYZabcdefghijklmnopqrstuvwxyz-._';
    final random = Random.secure();
    return List.generate(length, (_) => charset[random.nextInt(charset.length)])
        .join();
  }

  /// Returns the sha256 hash of [input] in hex notation.
  static String sha256ofString(String input) {
    final bytes = utf8.encode(input);
    final digest = sha256.convert(bytes);
    return digest.toString();
  }

  static Future<User> signInWithApple({BuildContext context}) async {
    User user;
    // To prevent replay attacks with the credential returned from Apple, we
    // include a nonce in the credential request. When signing in with
    // Firebase, the nonce in the id token returned by Apple, is expected to
    // match the sha256 hash of `rawNonce`.
    final rawNonce = generateNonce();
    final nonce = sha256ofString(rawNonce);

    // Request credential for the currently signed in Apple account.
    final appleCredential = await SignInWithApple.getAppleIDCredential(
      scopes: [
        AppleIDAuthorizationScopes.email,
        AppleIDAuthorizationScopes.fullName,
      ],
      nonce: nonce,
    );

    // Create an `OAuthCredential` from the credential returned by Apple.
    final oauthCredential = OAuthProvider('apple.com').credential(
      idToken: appleCredential.identityToken,
      rawNonce: rawNonce,
    );
    try {
      // Sign in the user with Firebase. If the nonce we generated earlier does
      // not match the nonce in `appleCredential.identityToken`, sign in will fail.
      final UserCredential userCredential =
          await FirebaseAuth.instance.signInWithCredential(oauthCredential);
      user = userCredential.user;
    } on FirebaseAuthException catch (e) {
      if (e.code == 'account-exists-with-different-credential') {
        ScaffoldMessenger.of(context).showSnackBar(
          AppWidget.customSnackBar(
            content: 'The account already exists with a different credential.',
          ),
        );
      } else if (e.code == 'invalid-credential') {
        ScaffoldMessenger.of(context).showSnackBar(
          AppWidget.customSnackBar(
            content: 'Error occurred while accessing credentials. Try again.',
          ),
        );
      }
    } catch (e) {
      ScaffoldMessenger.of(context).showSnackBar(
        AppWidget.customSnackBar(
          content: 'Error occurred using Apple Sign-In. Try again.',
        ),
      );
    }
    return user;
  }
}

Answer 1

我刚刚通过使用 iOS 13.0 作为模拟器解决了这个问题。 使用模拟器时似乎更高版本存在问题，但物理设备则没有。

你可以下载并安装模拟器一路回到iOS 13.0（这是Apple登录的最低版本。在Xcode中：

Xcode > 首选项。 Select “组件”选项卡。 标记您想要的模拟器。 按“立即检查并安装”。