iOS Parse Facebook Login error 308 FBSDKLoginBadChallengeString

Question

I'm trying to implement Facebook login in my iOS app, using Parse.

let permissionsArray = ["public_profile", "email"]

PFFacebookUtils.logInInBackgroundWithReadPermissions(permissionsArray)
    { (user: PFUser?, error: NSError?) in

    if let user = user {
        //we logged in!
    }
    else {
        //login error!
    }
}

This works well in the Simulator, but not on the device. On the device, I get this error:

Error Domain=com.facebook.sdk.login Code=308 "The operation couldn’t be completed. (com.facebook.sdk.login error 308.)

Error code 308 is for FBSDKLoginBadChallengeString, "The login response was missing a valid challenge string."

After I authorise my app on Facebook, this gets called:

func application(application: UIApplication, openURL url: NSURL, sourceApplication: String?, annotation: AnyObject?) -> Bool {
    return FBSDKApplicationDelegate.sharedInstance().application(application, openURL: url, sourceApplication: sourceApplication, annotation: annotation)
}

The url is:

fb1640722449492705://authorize/#state=%7B%22challenge%22%3A%225OKWv3wN%2BEH%2BeQu48Xv6ty%2BRuek%3D%22%2C%22com.facebook.sdk_client_state%22%3Atrue%2C%223_method%22%3A1%2C%220_auth_logger_id%22%3A%22564CD915-2CFC-4989-9AF6-CEA389908D51%22%7D&granted_scopes=user_birthday%2Cpublic_profile&denied_scopes=&signed_request=c8SBBDeaNpF-R_XTYx4LRA0BWm5p9IwXDr8M4nL3YXI.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&access_token=CAAXUOnbG6uEBANtAd9DzWBSu4LLOEcPsu86Ny0Ir

Yes, I followed everything in Parse's Facebook login guide (made sure that all bundle IDs match, implemented all required AppDelegate methods, etc).

What exactly does this error mean and how do you solve it?

Answer 1

A simple solution work for me. Just enable Keychain Sharing in Capabilities