graphRequest.start gibt keine Daten zurück

Question

Ich verwende das Facebook SDK für die Anmeldung mit iOS mit Swift 3.

Das ist mein Code. Das Problem ist, dass keine Werte zurückgegeben werden.

import UIKit 

Klasse Viewcontroller: UIViewController {

@IBOutlet weak var email: UITextField! 
@IBOutlet weak var password: UITextField! 
@IBOutlet weak var uLoginButton: UIButton! 

let loginButton: FBSDKLoginButton = { 

    let button = FBSDKLoginButton() 

    button.readPermissions = ["email"] 

    return button; 

}() 

override func viewDidLoad() { 
    super.viewDidLoad() 

    view.addSubview(loginButton); 
    loginButton.center = view.center 
    loginButton.delegate = self 

    if (FBSDKAccessToken.current() != nil) { 
     fetchProfile(); 
    } 

    self.style() 
} 

func fetchProfile(){ 

    let graphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields" : "email, name, first_name, last_name, picture.type(large)"]) 

    let connection = FBSDKGraphRequestConnection() 

    connection.add(graphRequest, completionHandler: { (connection, result, error) in 

     if error != nil { 

      //do something with error 
      print("No Data returned") 
      print(result) 
     } else { 

      //do something with result 
      print("Data returned") 
      print(result) 

     } 

    }) 

    connection.start() 

} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 

func style(){ 
    self.email.layer.cornerRadius = 15; 
    self.password.layer.cornerRadius = 15; 
    self.uLoginButton.layer.cornerRadius = 15; 

} 

}

Verlängerung Viewcontroller: FBSDKLoginButtonDelegate {

internal func loginButton(_ loginButton: FBSDKLoginButton!, didCompleteWith result: FBSDKLoginManagerLoginResult!, error: Error!) { 

    // when the login is correct! 
    print("Success login!"); 
    fetchProfile() 
} 

internal func loginButtonDidLogOut(_ loginButton: FBSDKLoginButton!) { 
    FBSDKAppEvents.activateApp() 
} 

internal func loginButtonWillLogin(_ loginButton: FBSDKLoginButton!) -> Bool { 
    return true 
} 

}

Answer 1

In Swift 3, thi s ist, wie Sie eine Graph-Anfrage durchführen möchten.

1. initialisieren FBSDKGraphRequest
2. initialisieren FBSDKGraphRequestConnection
3. Add Anfrage Anschluss
4. starten Verbindung zu beantragen.

so,

let graphRequest = FBSDKGraphRequest(graphPath: "me", parameters: ["fields" : "email"]) 
    let connection = FBSDKGraphRequestConnection() 
    connection.add(graphRequest, completionHandler: { (connection, result, error) in 

     if error != nil { 

      //do something with error 

     } else { 

      //do something with result 

     } 

    }) 

    connection.start()