FBSDKAccessToken nil

General
1

When I use the Facebook SDK to handle the Backendless login I receive nil in the FBSDKAccessToken when I try to login. My callback is shown below.


 func application(_ app: UIApplication, open url: URL, options: [String : AnyObject] = [:]) -> Bool {
 
  let source = options[UIApplicationOpenURLOptionsSourceApplicationKey] as! String
 
 let facebook = FBSDKApplicationDelegate.sharedInstance()!
 let handled:Bool = facebook.application(app, open: url, sourceApplication: source, annotation: nil) 
 
 if (handled) {
 
 let token = FBSDKAccessToken.current()
 
 let mappings = ["email":"email"]
 
 var fault:Fault?
 let user = backendless.userService.login(withFacebookSDK: token, fieldsMapping: mappings, error: &fault)
 
 if (fault == nil) {
 print("\(user)")
 } else {
 print("Server reported an error: \(fault!)")
 }
 
 }
 
 return true
 
 }
2

Please try this:

    func application(application: UIApplication, openURL url: NSURL, sourceApplication: String?, annotation: AnyObject) -> Bool {
        
        let result = FBSDKApplicationDelegate.sharedInstance().application(application, openURL: url, sourceApplication: sourceApplication, annotation: annotation)
        if result {
            
            let token = FBSDKAccessToken.currentAccessToken()
            let fieldsMapping = [
                "id" : "facebookId",
                "name" : "name",
                "birthday": "birthday",
                "first_name": "first_name",
                "last_name" : "last_name",
                "gender": "gender",
                "email": "email"
            ]
            
            backendless.userService.loginWithFacebookSDK(
                token,
                fieldsMapping: fieldsMapping,
                response: { (user: BackendlessUser!) -> Void in
                    print("user: \(user)")
               },
                error: { (fault: Fault!) -> Void in
                    print("Server reported an error: \(fault)")
            })
        }
        
        return result
    }
3

Sorry, I forgot to mention that I use Swift 3 and Xcode Beta 2.

4

Why you couldn’t use the above function in Swift 3?

5

You could, but the method is deprecated. It’s list with strikethrough in beta 2.

However, still returns nil for access token.

6

So, you get nil with a call

let token = FBSDKAccessToken.currentAccessToken()

How is this associated with Backendless SDK?