UIViewController pseudo code

gistfile1.swift

import UIKit

class UIViewController : NSObject {
    
    var _view: UIView?
    var view: UIViewb = {
        if isViewLoaded() == false {
            loadView()
            viewDidLoad()
        }
        return _view!
    }()
    
    func loadView() {
        // load from a xib into view
            // first check if the property nibName is set else,
            // check if we have a nib with the same name as the class (Swift issues)
            // load nib, else
        // load a generic blank UIView
    }
    
    func viewDidLoad() {
        // Do things like use outlets to finish preparing the UI
    }
	
    func isViewLoaded() -> Bool {
        let answer:Bool = false
        return answer
    }
    
}

// NOTES: If you ever need to ask a ViewController if 
// the view is loaded use `isViewLoaded`

class BNRProgramaticViewcontroller : UIViewController {
    
    override func loadView() {
        let newView = UIView(frame: CGRect()) // will let someone else determine this
        newView.backgroundColor = UIColor.redColor()
        self.view = newView;
        
        let newLabel = UILabel(frame: CGRect())
        let newButton = UIButton(frame: CGRect())
        self.view.addSubview(newLabel)
        self.view.addSubview(newButton)
        
        newButton.addTarget(self, action: "buttonAction", forControlEvents: UIControlEvents.TouchUpInside)
    }
    
    func buttonAction(sender: AnyObject?) {
        println("button tapped!")
    }
}

// One way to make a nib based
let quizVC = QuizViewController(nibName: "QuizViewController", bundle: nil)

class BNRNibBasedViewController : UIViewController {
    
    convenience init() {
        self.init(nibName: "BNRNibBasedViewController", bundle: nil)
    }
    
}