Styjun

I've seen similar questions on here but none seem to resolve my issue.

I'm currently creating an iOS app that uses the Facebook SDK to login and return user information.

I've successfully logged into facebook and receive the requested information. However, the request is not returning email despite allowing read permission for email.

 /********************
 Place Facebook login button
 *********************/
 let loginButton = FBSDKLoginButton()
 view.addSubview(loginButton)
 loginButton.delegate = self
 loginButton.readPermissions = ["email", "public_profile"]
 //add button constraints
 loginButton.center = view.center



}

/**
* Functions called when user handed back from facebook login
**/
func loginButtonDidLogOut(_ loginButton: FBSDKLoginButton!) 
 print("Did log out of facebook")

/**
 * Functions called when user handed back from facebook login
 **/
func loginButton(_ loginButton: FBSDKLoginButton!, didCompleteWith result: FBSDKLoginManagerLoginResult!, error: Error!) 
 if error != nil 
 print(error)
 else
 
 print("Successfully logged in with facebook")
 FBSDKGraphRequest(graphPath: "/me", parameters: ["fields": "id, name, email"]).start
 (connection, result, err) in
 if err != nil
 print("Failed to start graph request: ", err)
 return
 
 print(result)
 
 

You can't fetch the users email from an FBSDKGraphRequest according to Facebook Graph API tool. Facebook only returns the token used to login. If you used Facebook login with Firebase you could fetch the email with CurrentUser.currentEmail Method.

 let login = FBSDKLoginManager()

 login.logIn(withReadPermissions: ["email","user_posts","public_profile"], from: self, handler: 
 (result: FBSDKLoginManagerLoginResult?, error: Error?) in
 if error != nil 
 print("Process error")
 return
 
 else if (result?.isCancelled)! 
 print("Cancelled")
 
 else 
 //Success!
 let credential = FIRFacebookAuthProvider.credential(withAccessToken: FBSDKAccessToken.current().tokenString)
 self.firebaseLogin(credential)
 
 )

 import FBSDKCoreKit
 import FBSDKLoginKit
 import FBSDKShareKit


 @IBAction func btnFbPressed(_ sender: Any) 

 let loginManager = FBSDKLoginManager()

 loginManager.logIn(withReadPermissions: ["public_profile", "email"], from: self) (loginResult, error) in

 if error != nil 
 print(error!)

 
 else 

 if (loginResult?.grantedPermissions.contains("email"))! 
 self.getFBUserData()
 

 
 


 




 func getFBUserData()
 if((FBSDKAccessToken.current()) != nil)

 UserDefaults.standard.set(FBSDKAccessToken.current().tokenString, forKey: "fbToken")

 FBSDKGraphRequest(graphPath: "me", parameters: ["fields": "id, name, first_name, last_name, picture.type(large), email"]).start(completionHandler: (connection, result, error) -> Void in
 if (error == nil) 

 print(result as Any)

 let dictionary = result as! NSDictionary
 print(dictionary)

 let hud = MBProgressHUD.showAdded(to: self.view, animated: true)
 hud.tintColor = .black
 hud.mode = .indeterminate
 hud.label.text = "Loading"
 hud.animationType = .fade
 hud.show(animated: true)

 let postString = String(format: "login_type=facebook&email=%@&id=%@&device=0", arguments: [dictionary.value(forKey: "email") as! String, dictionary.value(forKey: "id") as! String])
 
 )
 
 

Well i pondered on this for a long time and came upon this link which suggested that if you don't have a confirmed email address I won't get it back in the login section of my code.

let request = GraphRequest(graphPath: "me", parameters: ["fields": "id, email, name, first_name, last_name, picture.type(large)"], accessToken: AccessToken.current, httpMethod: .GET, apiVersion: "2.12")
 request.start (response, result) in
 switch result 
 case .success(let value):
 print(value.dictionaryValue!)
 self.responseJSON = JSON(value.dictionaryValue!)
 let fullName = self.responseJSON["first_name"].stringValue
 let firstName = self.responseJSON["first_name"].stringValue
 let lastName = self.responseJSON["last_name"].stringValue
 let email = self.responseJSON["email"].stringValue
 let idFb = self.responseJSON["id"].stringValue
 let picture = self.responseJSON["picture"]["data"]["url"].stringValue

 print("user id: (idFb), firstName: (firstName), fullname: (fullName), lastname: (lastName), picture: (picture), email: (email)")

 print("ALL FIELDS PUBLISHED")


 if let delegate = self.responseDelegate 
 delegate.responseUpdated(self.responseJSON, forLogin: "FB")
 

 case .failed(let error):
 print(error)
 
 
 }

Hence when I got to it and confirmed my email address it gave me the email in response. Here are some attached snapshots.

This is how i got to it. Later I implemented that if the email is not returned, I showed an alert alerting the user that there is no email associated with that facebook account and either they confirm their email or proceed by giving a separate email address in an TextField Alert. And thats that.