init(coder:) has not been implemented in swift

Question

I have this class file for accepting card payments

import UIKit class PaymentViewController: UIViewController , PTKViewDelegate {      var card : STPCard     var PaymentView : PTKView     var button   = UIButton.buttonWithType(UIButtonType.System) as UIButton      init(PaymentView : PTKView , button : UIButton, card : STPCard) {         self.PaymentView = PaymentView         self.button = button         self.card = card         super.init()     }     required init(coder aDecoder: NSCoder) {         fatalError("init(coder:) has not been implemented") } 

When I build it, it works fine, but when I execute it (run it) on my actual device , I get

fatal error: init(coder:) has not been implemented. 

Any ideas ?

Answer 1

Based on the Inheritance Hierarchy you have setup. PaymentViewController will inherit 3 init methods. UIViewController provides init(nibName:bundle) as its designated initializer. UIViewController also conforms to NSCoding which is where the required init(coder:) comes from. UIViewController also inherits from NSObject which provides a basic init() method.

The problem you are having stems from init(coder: being called when the ViewController is instantiated from a .xib or storyboard. This method is called to un-archive the .xib/storyboard objects.

From the Documentation:

iOS initializes the new view controller by calling its initWithCoder: method instead.

You should be calling the superclass designated initializer in your init method, which is init(nibName:bundle) Note: it is fine for both of those parameters to be nil. Also your init(coder:) override should call super.init(coder:)

Answer 2

A simple workaround will do:

required init?(coder aDecoder: NSCoder) {     super.init(coder: aDecoder) }