title: Programmatically adding constraints to UIView
body: <p>I haven't done much UI Programmatically, but I have a UIView and I want a UILabel to be constrained to the top left corner of the UIView and then have another one but constrained to the top right corner this time. I'm fully aware of how to do this on the GUI but I was wondering how I would go about this purely through swift/programmatically.</p>