Unable to sign in with facebook on iOS

[kashif789us]

Hello guys. I have parse server running on aws beanstalk and mlab is used for mongodb. I am unable to sign in using facebook.

I am using SWIFT, here is the code snippet I am using

           PFFacebookUtils.logInInBackgroundWithReadPermissions(["public_profile","email"]) {
            (user: PFUser?, error: NSError?) -> Void in
            if let user = user {
                if user.isNew {
                    print("User signed up and logged in through Facebook!")
                }
                else {
                    print("User logged in through Facebook!")
                }
            }
            else {
                print("Uh oh. The user cancelled the Facebook login.")
            }

I am getting both user and error nil. I googled it and found 2 things.

1. Add facebookAppIds : ['fbAppId'] to my index.js and I did
2. Add Environmental variable FACEBOOK_APP_ID and I did

Still I am facing the same issue. How to fix it?

[bohemima]

Start parse-server with VERBOSE=1 option and see if there are any hints in the log as to why it doesnt work.

[kashif789us]

I am sorry I am a beginner in this. How can I start with VERBOSE=1?

[kwstasna]

Could you provile the xCode logs of error? Because i had some of the same issue and i managed to fix it with debugging from xCode logs :)

[kashif789us]

What I did was login with FBSDKLoginManager, then I grabbed the fbAccessToken and then signed in with PFFacebookUtils.logInInBackgroundWithAccessToken and its working.

[dnadri]

@kashif789us I was in a very similar situation as you and what fixed it for me without this workaround was this:
In AppDelegate.swift, the ParseClientConfiguration must be initialized BEFORE the Parse Facebook Utils initialization in didFinishLaunchingWithOptions:

...
        // *** Initialize Parse. ***
        let config = ParseClientConfiguration(block: {
            (ParseMutableClientConfiguration) -> Void in
            ParseMutableClientConfiguration.applicationId = appKey;
            ParseMutableClientConfiguration.clientKey = clientKey;
            ParseMutableClientConfiguration.server = serverURL;
        });

        Parse.initializeWithConfiguration(config);

        // *NOTE: Putting the following line after after Parse.initializeWithConfiguration(config) fixed the issue
        // After this change, the user is no longer nil and does not print "Uh oh. The user cancelled the Facebook login.". Instead, it executes the `if let user = user` block
        PFFacebookUtils.initializeFacebookWithApplicationLaunchOptions(launchOptions)
...