Login always opens WebView instead of native app on iOS

[xerdnu]

Im having an issue where the login doesnt work as expected on ios. The facebook login always defaults to opening a webview instead of using the native facebook app.

I noticed in the source code that LoginManager.setLoginBehavior has return for ios so i guess this is intentionally disabled on ios?

Minimal code to reproduce the behavior

const onFacebookButtonPress = async () => {

  console.log("Begin sign in: Facebook");

  // Not supported on ios?
  LoginManager.setLoginBehavior('NATIVE_WITH_FALLBACK');

  // Attempt login with permissions
  const result = await LoginManager.logInWithPermissions(['public_profile', 'email']);

  if (result.isCancelled) {
    console.log('User cancelled the login process');
    return;
  }

  // Once signed in, get the users AccesToken
  const data = await AccessToken.getCurrentAccessToken();

  if (!data) {
    throw 'Something went wrong obtaining access token';
  }

  // Create a Firebase credential with the AccessToken
  const facebookCredential = auth.FacebookAuthProvider.credential(data.accessToken);

  // Sign-in the user with the credential
  return auth().signInWithCredential(facebookCredential).catch(function(error) {
      if (error.code === "auth/account-exists-with-different-credential"){
          alert("Facebook account does not exist.");
      } else {
          alert(error.message);
      }
      console.log(error.message+" with code: "+error.code);
  });
}

I would be really grateful if anyone could provide some clarification if the native login i supported on ios and if there are any workaround to make the native app open instead of the webview.

Best regards!

[solitarysp]

I also got the same issue :((

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[xerdnu]

I found this inside FBLoginManager.ts so it seems that only browser is supported on iOS :(

export type LoginBehaviorAndroid =
  // Attempt login in using the Facebook App, and if that does not work fall back to web dialog auth.
  | 'native_with_fallback'
  // Only attempt to login using the Facebook App.
  | 'native_only'
  // Only the web dialog auth should be used.
  | 'web_only';
/**
 * Indicate how Facebook Login should be attempted on iOS.
 */
export type LoginBehaviorIOS =
  // Attempts log in through the Safari browser.
  // This is the only behavior supported by the native sdk.
  'browser';