gistfile1.txt

import UIKit

class TestView: UIView {
    override func intrinsicContentSize() -> CGSize {
        return CGSizeMake(100, 100)
    }
}

class ViewController: UIViewController {
    override func viewDidLoad()  {
        self.view.backgroundColor = UIColor.greenColor()
        var leftView = TestView(frame: CGRectMake(0, 0, 100, 100))
        
        leftView.setTranslatesAutoresizingMaskIntoConstraints(false)
        leftView.backgroundColor = UIColor.redColor()
        
        var rightView = TestView(frame: CGRectMake(0, 0, 100, 100))
        rightView.setTranslatesAutoresizingMaskIntoConstraints(false)
        rightView.backgroundColor = UIColor.magentaColor()
        
        self.view.addSubview(leftView)
        self.view.addSubview(rightView)
        
        var constraints = H(|-leftView-rightView-|)
        constraints += V(|-leftView-|)
        constraints += V(|-rightView-|)

        self.view.addConstraints(constraints)
    }
}