title: Thread 1 breakpoint 1.1 error - swift
body: <p>I am working on this code. I have to display username in a textfield, but it displays an error and the application crashes. </p>
  
  <pre><code>//
  //  TableViewControllerSettings.swift
  //  Secondo B
  //
  //  Created by Edoardo on 16/12/15.
  //  Copyright © 2015 ERC. All rights reserved.
  //
  
  import UIKit
  import Parse
  import ParseUI
  
  class TableViewControllerSettings: UITableViewController {
  
  @IBOutlet weak var UserName: UILabel!
  
  override func viewDidLoad() {
  
      super.viewDidLoad()
  
      self.UserName.text = "Bentornato " + (PFUser.currentUser()?.username)!
  
  }
  
  override func didReceiveMemoryWarning() {
      super.didReceiveMemoryWarning()
  }
  
  override func numberOfSectionsInTableView(tableView: UITableView) -&gt; Int {
      return 1
  }
  
  override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -&gt; Int {
      return 2
  }
  
  @IBAction func Logout(sender: AnyObject) {
  
      PFUser.logOut()
      performSegueWithIdentifier("goto_tableLogin", sender: self)
      let alert = UIAlertView(title: "Logout", message: "Hai effettuato il logout", delegate: self, cancelButtonTitle: "OK")
      alert.show()
  
  }
  
  }
  </code></pre>
  
  <p>how can I solve the problem in the line       </p>
  
  <p>self.UserName.text = "Bentornato" ?</p>
  
  <p>t displays me an error breakpoint 1.1</p>