Segues in Swift - xcode

Question

im new to swift / xcode. I am trying to set up a facebook login.
The login works fine but when the login is successful the segue doesnt appear to work. There are no errors it just doesnt go to the next viewcontroller.
I suspect the issue lies here somehow:
self.performSegueWithIdentifier("showNew", sender: self)
any ideas?
import UIKit
import FBSDKCoreKit
import FBSDKLoginKit
class ViewController: UIViewController, FBSDKLoginButtonDelegate {
override func viewDidLoad() {
super.viewDidLoad()
if (FBSDKAccessToken.currentAccessToken()==nil){
println("not Logged in")
}
else{
println("Logged in!")
self.performSegueWithIdentifier("showNew", sender: self)
}
var loginButton = FBSDKLoginButton()
loginButton.readPermissions = ["public_profile","email","user_friends"]
loginButton.center = self.view.center
loginButton.delegate = self
self.view.addSubview(loginButton)
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!) {
if error == nil {
println("Login Complete")
}
else
{
println(error.localizedDescription)
}
}
func loginButtonDidLogOut(loginButton: FBSDKLoginButton!) {
println("User Logged Out!")
}
}

Answer 1

Your forgot to declare the identifier.

Answer 2

I assume that you want the app to move to next view controller after the FB login. Basically move on login success.
Move
self.performSegueWithIdentifier("showNew", sender: self)
to loginButton delegate.
func loginButton(loginButton: FBSDKLoginButton!, didCompleteWithResult result: FBSDKLoginManagerLoginResult!, error: NSError!)
{
if (error == nil)
{
println("Login Complete")
self.performSegueWithIdentifier("showNew", sender: self)
}
else
{
println(error.localizedDescription)
}
}
If your segue was not defined properly, the app would have crashed. Since it is not crashing at self.performSegueWithIdentifier, you can believe that it is defined.