Class written in Swift cannot be a Nib Owner (Crash)

Question

Here is what I am trying to do: Design a view in a nib file. Back the view and nib owner with classes written in Swift. Instantiate nib's view in Swift. Code that crash:

var myViewOwner: MyViewOwner?
NSBundle.mainBundle().loadNibNamed("MyView", owner: myViewOwner, options: nil) // crash

... with error:

[NSObject 0x7bfa0cc0 setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key myView.

So, I have: nib file with blank view where view is of type MyClass and nib owner of type MyViewOwner. Both classes written in Swift.

What I already tried (Initial attempt):

I will be posting only MyViewOwner class code since MyView.swift is just a class definition.

MyViewOwner.swift

class MyViewOwner {
    @IBOutlet weak var myView: MyView
}

Caused error above.

2-nd attempt with NSObject:

Of course Swift objects are not KVO compliant, so I tried:

class MyViewOwner: NSObject {
    @IBOutlet var myView: MyView
}

... and:

class MyViewOwner: NSObject {
    @IBOutlet strong var myView: MyView = MyView() // we need to set something since it's 'strong'
}

Both caused error above.

3-rd attempt with @objc annotation:

@objc class MyViewOwner: NSObject {
    @objc @IBOutlet strong var myView: MyView = MyView()
}

Didn't helped either, same error.

What I am doing wrong? In what way should I write all code in swift to make it work?

---

UPDATE: Owner and View setup in xCode

UPDATE: Owner to View connection

Answer 1

This code, if it is genuinely your code, makes no sense:

var myViewOwner: MyViewOwner?
NSBundle.mainBundle().loadNibNamed("MyView", owner: myViewOwner, options: nil)

The variable myViewOwner in the first line is uninitialized; there is no object there. Hence that object cannot function as the owner: of anything, as you ask it to do in the second line.

Perhaps what you mean is:

let myViewOwner = MyViewOwner() // or whatever the initializer is
NSBundle.mainBundle().loadNibNamed("MyView", owner: myViewOwner, options: nil)