gistfile1.swift

  override func viewDidLoad() {
    self.view.backgroundColor = UIColor.whiteColor()

    self.view.setTranslatesAutoresizingMaskIntoConstraints(false)

    for clockViewController in self.clockViewControllers {
      self.view.addSubview(clockViewController.view)
    }

    for var i = 0; i < self.clockViewControllers.count; ++i {
      self.clockViewControllers[i].view.backgroundColor = self.colors[i]
    }

    for var i = 0; i < self.clockViewControllers.count; ++i {
      var constraints = NSLayoutConstraint.constraintsWithVisualFormat("|[view]|", options: nil, metrics: nil, views: ["view": self.clockViewControllers[i].view])
      self.view.addConstraints(constraints)
    }

    var firstView = self.clockViewControllers[0].view
    for var i = 1; i < self.clockViewControllers.count; ++i {
      println(self.clockViewControllers[i].view)
      var constraint = NSLayoutConstraint(item: firstView, attribute: .Height, relatedBy: .Equal, toItem: self.clockViewControllers[i].view, attribute: .Height, multiplier: 0, constant: 0)
      self.view.addConstraint(constraint)
    }

    var constraints = NSLayoutConstraint.constraintsWithVisualFormat("V:|[view1][view2][view3][view4][view5][view6]|", options: nil, metrics: nil, views: ["view1": self.clockViewControllers[0].view, "view2": self.clockViewControllers[1].view, "view3": self.clockViewControllers[2].view, "view4": self.clockViewControllers[3].view, "view5": self.clockViewControllers[4].view, "view6": self.clockViewControllers[5].view])
    self.view.addConstraints(constraints)
  }