Swift Visual Format Language Not working

I'm trying to get the Visual Format Language working in swift but I just can't get it to work with a simple example. I'm trying to get the label to show up somewhere else other than the top left corner. This is how it shows up now:

And this is my code:

override func viewDidLoad() {
        super.viewDidLoad()

        let label = UILabel()
        label.text = "Label 1"
        label.sizeToFit()

        self.view.addSubview(label)
        self.view.translatesAutoresizingMaskIntoConstraints = false

        let views = Dictionary(dictionaryLiteral: ("label", label))

        let horizontalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("H:|-30-[label]-|",
            options: [],
            metrics: nil,
            views: views)

        self.view.addConstraints(horizontalConstraints)

        let verticalConstraints = NSLayoutConstraint.constraintsWithVisualFormat("V:|-30-[label]-|",
            options: [],
            metrics: nil,
            views: views)

        self.view.addConstraints(verticalConstraints)
}

Can anyone see what is wrong?

You need to add label.translatesAutoresizingMaskIntoConstraints = false

Without this, the label's autoresizing mask is transformed into constraints when layoutSubviews is performed. The boolean applies only to the view and not its subviews.