I have a view that I'm trying to load in Swift like this, but it crashes with this error: 'NSInternalInconsistencyException', reason: '-[UIViewController _loadViewFromNibNamed:bundle:] loaded the "DetailView" nib but the view outlet was not set.'

Here is the code I'm trying to use to load it.

Second View Controller

import UIKit
class DetailViewController: UIViewController {
    @IBOutlet var nameField: UITextField

    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

Code to load the view controller:

var newViewController = DetailViewController()

@IBAction func buttonTapped(AnyObject) {
    println("button tapped!")
    self.presentViewController(newViewController, animated: true, nil)
}

What am I doing wrong?