React-native-fbsdk: Can not display an alert when using LoginManager

[prabak]

I am trying to do an alert when logging into facebook via the following code on iOS.

LoginManager.logInWithReadPermissions(['email', 'public_profile']).then(
      function(result) {
        alert("Finished loging into facebook");
      },
     function(error) {
      alert("Problem with login");
    },
);

The login dialog is shown and when I either cancel or log in, I am getting the following warning without the alert:

Warning: Attempt to present <UIAlertController: 0x7ff705593770> on <FBSDKContainerViewController: 0x7ff7019e5820> whose view is not in the window hierarchy!

Any idea how to fix this?

[Elyx0]

Exactly same issue here.

Warning: Attempt to present <UIAlertController: 0x7fe6f4d22320> on <FBSDKContainerViewController: 0x7fe6f4d1db00> whose view is not in the window hierarchy!

[dcolin]

I think i a have a similar problem with LoginManager, errors alerts works but i can't get the login success alert, my app stay on a white page with URL : https://m.facebook.com/v2.7/dialog/oauth/confirm

No errors in Xcode console... Any idea ?

Here is my code :

const FBSDK = require('react-native-fbsdk');
const {
  LoginButton,
  LoginManager,
  AccessToken
} = FBSDK;

// Attempt a login using the Facebook login dialog asking for default permissions.
LoginManager.logInWithReadPermissions(['public_profile']).then(
  function(result) {
    alert(result);
    console.log(result);
    if (result.isCancelled) {
      alert('Login cancelled');
    } else {
      alert('Login success with permissions: '
        +result.grantedPermissions.toString());
    }
  },
  function(error) {
    alert('Login fail with error: ' + error);
  }
);

[dcolin]

Sorry i found the problem...
I missed to configure my AppDelegate.m like explain in #72

[congnguyen91]

I have the same issue when call login facebook after click an alert. I have configed openURL for FBSDK in AppDelegate.m It doesn't open Facebook URL.
" -canOpenURL: failed for URL: "fbauth2:/" - error: "(null)"
"Warning: Attempt to present on whose view is not in the window hierarchy!"

Here is my code.

 _showAlertFacebookLogin () {
    Alert.alert(
      'Login Facebook',
      'Please Login Facebook',
      [
        {text: 'No thanks!', onPress: () => {}, style: 'cancel'},
        {text: 'OK', onPress: () => this._loginFacebook()}
      ]
    )
  }

  _loginFacebook () {
    const permissions = ["public_profile", "user_posts", "user_photos", "user_location"];
    LoginManager.logInWithReadPermissions(permissions).then(
      (result) => {
        if (result.isCancelled) {
          alert('Login Facebook has been canceled');
        } else {
          AccessToken.getCurrentAccessToken().then(
            (data) => {
              this._saveFacebookAccessToken(data.accessToken.toString());
          });
          alert('You have logged in facebook successfully with granted permissions: ' +
            result.grantedPermissions.toString());
        }
      },
      (error) => {
        Alert.alert("Login Facebook", 'ERROR:' + error);
      }
    )
  }  

• 1 for fix this :).
  Thanks

[gryffindors]

@congnguyen91 Were you able to resolve the issue? I am running into same problems. Please share your solution if you were able to solve the problem. Thanks in advance.

[ntcong91]

I use Timeout for delay 500ms. Wait for Alert completely disappearing.

_showAlertFacebookLogin () {
    Alert.alert(
      'Login Facebook',
      'Please Login Facebook',
      [
        {text: 'No thanks!', onPress: () => {}, style: 'cancel'},
        {text: 'OK', onPress: () => {
          TimerMixin.clearTimeout(this._loginTimeout);
          this._loginTimeout = setTimeout(() =>
            this._loginFacebook(),
            500
          );
        }}
      ]
    )
  }

[ljhender]

This was fixed for me by enabling Keychain sharing in the Capabilites section of the app settings.

Not sure how its related but it was on a stack overflow issue similar to this one.

Edit: this is on xcode 8 building for iOS 10.