Swift - Facebook SDK

import UIKit
import FBSDKCoreKit
import FBSDKLoginKit
import FBSDKShareKit

class ViewController: UIViewController, FBSDKLoginButtonDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        var loginButton:FBSDKLoginButton = FBSDKLoginButton()
        loginButton.center = self.view.center
        self.view.addSubview(loginButton)

        loginButton.delegate = self

        var contentShare:FBSDKShareLinkContent = FBSDKShareLinkContent()
        var button:FBSDKShareButton = FBSDKShareButton()
        button.frame = CGRectMake(200,500,100,50)

        var contentURL = NSURL(string: "https://xxx/")
        var imgURL = NSURL(string: "xxx.png")
        contentShare.imageURL = imgURL
        contentShare.contentURL = contentURL
        contentShare.contentTitle = "Tech Blog-"
        contentShare.contentDescription = "Great, do you like this?"
        button.shareContent = contentShare

        self.view.addSubview(button)

    }

    func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!) {
        print("Login success!")
//        loadProfile()

//        // load avatar
//        var hinh = FBSDKProfilePictureView(frame: CGRectMake(view.frame.size.width/2, 100, 100, 100))
//        self.view.addSubview(hinh)

//        FBSDKShareDialog *dialog = [[FBSDKShareDialog alloc] init];
//        dialog.fromViewController = self;
//        dialog.content = content;
//        dialog.mode = FBSDKShareDialogModeShareSheet;
//        [dialog show];
    }

    func loginButtonDidLogOut(loginButton: FBSDKLoginButton!) {
        print("Logout success!")
    }

    func loadProfile(){
        var request:FBSDKGraphRequest = FBSDKGraphRequest(graphPath: "me?fields=id,name,gender", parameters: nil)
        request.startWithCompletionHandler({
            (connection,result,error)-> Void in
            if error != nil {
                print("Error load Profile")
            } else {
                print("Result: \(result)")
            }
        })
    }

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


}