Loading ViewController from xib file

Question

I had a MyViewController.swift and a MyViewController.xib presenting the layout of MyViewController.

I tried different methods to load this view controller including:

//1 let myVC = UINib(nibName: "MyViewController", bundle:        nil).instantiateWithOwner(nil, options: nil)[0] as? MyViewController  //2 let myVC = NSBundle.mainBundle().loadNibNamed("MyViewController", owner: self, options: nil)[0] as? MyViewController  //3 let myVC = MyViewController(nibName: "MyViewController", bundle: nil) 

The third one is the only successful initialisation, but the previous two are causing error:

Terminating app due to uncaught exception 'NSUnknownKeyException',

reason: '[ setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key XXX.

What's wrong with those loading methods?

Answer 1

Swift 3

let myViewController = MyViewController(nibName: "MyViewController", bundle: nil) self.present(myViewController, animated: true, completion: nil) 

or push in navigation controller

self.navigationController!.pushViewController(MyViewController(nibName: "MyViewController", bundle: nil), animated: true)