Can't get access token in Xcode Swift Facebook login SDK

Question

I'm trying to test Facebook SDK login in my app but keep getting this error. I see a dialog which accepts my email and password to login and then tells me I have already accepted the app. I should see a message "Logged in but I only see the error below. How can I test the Facebook SDK in the Xcode iOS simulator. I tested this on an iPhone with an alert to display the access token but got the same result. It will always present "User cancelled login".

-canOpenURL: failed for URL: "fbauth2:/" - error: The operation couldn’t be completed. (OSStatus error -10814.) User cancelled login.

Here is my code.

func signInWithFacebook(button: UIButton) {

    let loginManager = LoginManager()

    loginManager.logIn([ .publicProfile ], viewController: self) { loginResult in

        switch loginResult {

        case .failed(let error):

            let alertController: UIAlertController = UIAlertController(title: "Login error", message: error as? String, preferredStyle: .alert)

            let okAction: UIAlertAction = UIAlertAction(title: "OK", style: .default) { action -> Void in }

            alertController.addAction(okAction)

            self.present(alertController, animated: true, completion: nil)

            print(error)

        case .cancelled:

            let alertController: UIAlertController = UIAlertController(title: "Login cancelled", message: "User cancelled login", preferredStyle: .alert)

            let okAction: UIAlertAction = UIAlertAction(title: "OK", style: .default) { action -> Void in }

            alertController.addAction(okAction)

            self.present(alertController, animated: true, completion: nil)

            print("User cancelled login.")

        case .success(let grantedPermissions, let declinedPermissions, let accessToken):

            print(grantedPermissions)

            print(declinedPermissions)

            print(accessToken)

            let alertController: UIAlertController = UIAlertController(title: "Login success", message: String(describing: accessToken), preferredStyle: .alert)

            let okAction: UIAlertAction = UIAlertAction(title: "OK", style: .default) { action -> Void in }

            alertController.addAction(okAction)

            self.present(alertController, animated: true, completion: nil)

            print("Logged in")
        }
    }
}

On the first pass, I got the Facebook login dialog but thereafter I just see a dialog saying I have already authorized my app with an OK button.

let accessToken = AccessToken.current

in viewDidLoad() returns nil always. I need to get an accessToken so i can send it to an API and test the response.

I don't need the user info but I do need the token and the other variables set by login .success. I want to send the token to an API for login there. — markhorrocks, Jun 03 '17 at 05:07
No, it always returns nil. I can never get my code to print "Logged in". It is always "User cancelled login". — markhorrocks, Jun 03 '17 at 06:24
did your fb redirect to your automatically while your authentication complete.? or you have pressed Done button on login page ? — KKRocks, Jun 03 '17 at 06:35
Yes, I attached an image to the question. It always returns "User cancelled login" after I click Done. — markhorrocks, Jun 03 '17 at 06:36
Yes, I press OK and then Done and then I just get "User cancelled login". — markhorrocks, Jun 03 '17 at 06:37
Can you provide some more info about your edit to that answer please? Line number #94 reads as this `[[NSUserDefaults standardUserDefaults] setObject:value forKey:key];` — markhorrocks, Jun 05 '17 at 07:20
in any case, I would have thought the dialog above should give me ,success rather than .cancelled. — markhorrocks, Jun 05 '17 at 11:57
@markhorrocks In the Facebook app settings page, have you made your app public? — Minkle Garg, Jun 05 '17 at 13:44
Yes., the app is public and I get no warnings that it is not. I am using this guide for setup and there is no mention of any other settings developers.facebook.com/docs/swift/login — markhorrocks, Jun 05 '17 at 17:43

score 2 · Answer 1 · answered Jun 07 '17 at 06:38

2

mb for fb login only better use FacebookLogin

token here:

FBSDKAccessToken.current().tokenString

answered Jun 07 '17 at 06:38

Andrew DevNir

123
6

actually `let token = accessToken.authenticationToken` – markhorrocks Jun 07 '17 at 09:14
hm. interesting, but on one my project i see: ` func loginButtonDidCompleteLogin(_ loginButton: LoginButton, result: LoginResult){ switch result { case .failed(let error): print(error) case .cancelled: print("Cancelled") case .success(let grantedPermissions, let declinedPermissions, let accessToken): print("Logged In", FBSDKAccessToken.current().tokenString) ... } } }` and its works! :) – Andrew DevNir Jun 07 '17 at 11:16

score 1 · Accepted Answer · answered Jun 05 '17 at 20:34

I needed to add this function in my AppDelegate.swift. It seems completely undocumented.

func application(_ application: UIApplication, open url: URL, sourceApplication: String?, annotation: Any) -> Bool {

        return FBSDKApplicationDelegate.sharedInstance().application(application,
                                                                     open: url,
                                                                     sourceApplication: sourceApplication,
                                                                     annotation: annotation)
}

Anurag Sharma · Answer 3 · 2017-06-02T16:13:47.507

0

I think Error status 10814 is related to cantOpenUrl, which is used when Facebook call the URL using the arguments fbauth2:/. Like suggested here. Printing happens inside this function so you can't do anything much with that

You can also change this in Settings:

Targets > Capabilities > Enable Keychain Sharing

It doesn't matter because you are testing in the Simulator and it will not be coming when you will test in a real device.

edited Jun 02 '17 at 16:13

answered Jun 02 '17 at 16:09

Anurag Sharma

4,276
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I need to test this on a simulator as I need to send the facebook access token to an api for login there. – markhorrocks Jun 02 '17 at 16:16

score 0 · Answer 4 · answered Jun 02 '17 at 16:12

0

If you have already added to CFBundleURLSchemes in your Info.plist to LSApplicationQueriesSchemes.

If you are trying to resolve "canOpenURL: failed" warnings, those only indicate that the Facebook app is not installed on your device or simulator and can be ignored.

answered Jun 02 '17 at 16:12

KKRocks

8,222
1
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How can I install the facebook app on a simulator? – markhorrocks Jun 02 '17 at 16:14
you dont need to install you need to just ignore this warning in simulator. – KKRocks Jun 02 '17 at 16:16
Is it possible to install the app? I need to obtain the access token and send it to an API then test the response. – markhorrocks Jun 02 '17 at 16:17
try to authenticate your app in simulator . you will get access token with this warning. – KKRocks Jun 02 '17 at 16:19
@markhorrocks I think you already getting the access token! That's why you were able to log in. Yes, as KKRocks is saying just ignore this message. Everything is working fine! – Anurag Sharma Jun 02 '17 at 16:19
Surely it should print "Logged In"? I see a message saying I have already authorized the app and an OK button. – markhorrocks Jun 02 '17 at 16:20
let accessToken = AccessToken.current returns nil – markhorrocks Jun 02 '17 at 16:27

Can't get access token in Xcode Swift Facebook login SDK

4 Answers4