Hide back button in navigation bar with hidesBackButton in Swift

Question

I want to hide the back button when transitioning from one view to another. I read the questions regarding this problem and every answer was \"use hidesBackButton\"

Answer 1

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.

    self.navigationController?.navigationBarHidden = false
    var button: UIButton = UIButton()
    button.setImage(UIImage(named: "person-icon.jpg"), forState: .Normal)
    button.frame = CGRectMake(0, 0, 25, 25)
    button.targetForAction("actioncall", withSender: nil)
    var rightItem:UIBarButtonItem = UIBarButtonItem()
    rightItem.customView = button
    self.navigationItem.rightBarButtonItem = rightItem

    let backButton = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.Plain, target: navigationController, action: nil)
    navigationItem.leftBarButtonItem = backButton
}

override func viewWillAppear(animated: Bool) {
    let backButton = UIBarButtonItem(title: "", style: UIBarButtonItemStyle.Plain, target: navigationController, action: nil)
    navigationItem.leftBarButtonItem = backButton
}