how to fetch profile picture from facebook

Question

I am trying to fetch the profile picture of the user. But as Facebook has update its API sdk to v4.0 or later, and also on the FB developers site, they are explaining in Objective C, but I want code in Swift. I am not getting how to use FBSDKProfilePicture in my code. I need help to get profile picture of user.

I want to store the picture in my second view. Please anyone help me to code. Here is my code.

class ViewController: UIViewController, FBSDKLoginButtonDelegate {

let loginManager = FBSDKLoginManager()
let loginView : FBSDKLoginButton = FBSDKLoginButton()

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    if (FBSDKAccessToken.currentAccessToken() != nil)
    {
        println("user already logged in")
        loginManager.logOut()
        // User is already logged in, do work such as go to next view controller.
    }

    self.view.addSubview(loginView)
    loginView.center = self.view.center
    loginView.readPermissions = ["public_profile", "email", "user_friends"]
    loginView.delegate = self
    FBSDKProfile.enableUpdatesOnAccessTokenChange(true)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "onProfileUpdated:", name:FBSDKProfileDidChangeNotification, object: nil)

}

func returnUserData()
{
    let graphRequest : FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me", parameters: nil)
    graphRequest.startWithCompletionHandler({ (connection, result, error) -> Void in

        if ((error) != nil)
        {
            // Process error
            println("Error: \(error)")
        }
        else
        {
            println("fetched user: \(result)")
            let userName : NSString = result.valueForKey("name") as! NSString
            println("User Name is: \(userName)")
            let userEmail : NSString = result.valueForKey("email") as! NSString
            println("User Email is: \(userEmail)")
    }
    })
}

}

Answer 1

If you are able to log in with Facebook, then you should have the FB ID of that user. With that in hand, you can use this for get the profile picture:

func getProfPic(fid: String) -> UIImage? {
    if (fid != "") {
        var imgURLString = "http://graph.facebook.com/" + fid! + "/picture?type=large" //type=normal
        var imgURL = NSURL(string: imgURLString)
        var imageData = NSData(contentsOfURL: imgURL!)
        var image = UIImage(data: imageData!)
        return image
    }
    return nil
}

You can also change the type parameter to a different size in the URL.