I have a Flutter app that uses a package to login via a third party, and I want to run it over iOS and Android devices.

When this app is ran on Android, it doesn't have any issues and I can work on the app smoothly, but now that I'm trying to release a version for iOS (first I build it via Xcode, then I push it to the Apple developer membership account, and then I install it on my iPhone), to login via Google (or Facebook or Twitter) I need to click a "Share Your Information" dialog, but this disappears before I can click it. Is there any special permission I should activate to solve this issue?

Please consider that this is the first app I try to release using an Apple Membership, so you can take this question as one made by a person with almost zero knowledge of Apple development.

Here is the dialog that disappears. It gives enough time to see it, but it disappears 1 second later and you can't click on any of both buttons.

EDIT:

This is the process after following the instructions in the first answer of @lepsch (I really appreciate your effort in helping me, sorry for the bombarding of questions)

[!] CocoaPods could not find compatible versions for pod "web3auth_flutter":
  In Podfile:
    web3auth_flutter (from `.symlinks/plugins/web3auth_flutter/ios`)

Specs satisfying the `web3auth_flutter (from `.symlinks/plugins/web3auth_flutter/ios`)` dependency were found, but they required a higher minimum deployment target.

CodePudding user response：

The problem is that web3auth_flutter needs iOS 13 as deployment target but the project is configured to use 12. Go to the file ios/Runner.xcodeproj/project.pbxproj and update the 3 references from IPHONEOS_DEPLOYMENT_TARGET = 12.0; to IPHONEOS_DEPLOYMENT_TARGET = 13.0;.

Also, the web3auth_flutter dependency in pubspec.yaml is pointing to an old fork on Github, version 0.0.2, instead of the latest version 1.0.0. Just update pubspec.yaml like the following and run flutter pub get.

# ...

dependencies:
  web3auth_flutter: ^1.0.0

# ...

The web3auth_flutter version 1.0.0 needs some changes in the source. Here they are (clientId, redirectUrl, and whiteLabel.name have been redacted to xxx):

  Future<void> initPlatformState() async {
    HashMap themeMap = HashMap<String, String>();
    themeMap['primary'] = "#fff000";

    await Web3AuthFlutter.init(Web3AuthOptions(
      clientId: 'xxx',
      network: Network.mainnet,
      redirectUrl: Uri.parse('xxx://auth'),
      whiteLabel: WhiteLabelData(
          dark: true, name: "xxx", theme: themeMap),
    ));
  }

  // ...

  // Functions to log in/out
  VoidCallback _login(Future<Web3AuthResponse> Function() method) {
    return () async {
      try {
        final Web3AuthResponse response = await method();
        final prefs = await SharedPreferences.getInstance();
        var privKey = response.privKey;
        var ec = getS256();
        var privHex = PrivateKey.fromHex(ec, privKey!);
        var pubKey = privHex.publicKey.toCompressedHex();
        String authToken = createToken(privKey);
        await prefs.setString('token', authToken);
        await prefs.setString('public-key', pubKey);
        setState(() {
          _result = prefs.getString('token');
          _mail = response.userInfo!.email.toString();
          _name = response.userInfo!.name.toString();
        });
        await Navigator.pushNamed(context, "/homepage");
      } on UserCancelledException {
        print("User cancelled.");
      } on UnKnownException {
        print("Unknown exception occurred");
      }
    };
  }

  Future<Web3AuthResponse> _withGoogle() {
    return Web3AuthFlutter.login(LoginParams(
        loginProvider: Provider.google, mfaLevel: MFALevel.MANDATORY));
  }

  Future<Web3AuthResponse> _withFacebook() {
    return Web3AuthFlutter.login(LoginParams(
        loginProvider: Provider.facebook, mfaLevel: MFALevel.MANDATORY));
  }

  Future<Web3AuthResponse> _withTwitter() {
    return Web3AuthFlutter.login(LoginParams(
        loginProvider: Provider.twitter, mfaLevel: MFALevel.MANDATORY));
  }

  Future<Web3AuthResponse> _withMail() {
    return Web3AuthFlutter.login(LoginParams(
      loginProvider: Provider.email_passwordless,
      mfaLevel: MFALevel.MANDATORY,
      extraLoginOptions: ExtraLoginOptions(login_hint: _mail),
    ));
  }
}