Code-only UI Demonstration: ViewController

MasterViewController.swift

class MasterViewController: UIViewController {
    var activityIndicatorView: UIActivityIndicatorView = UIActivityIndicatorView()

    var baseView: UIView  =   UIView()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        baseView.frame = CGRect.zero;
        baseView.translatesAutoresizingMaskIntoConstraints = false
        
        let viewsDictionary = ["view": baseView]
        view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat(
            "H:|-0-[view]-0-|", options: [], metrics: nil, views: viewsDictionary))
        view.addConstraints(NSLayoutConstraint.constraintsWithVisualFormat(
            "V:|-0-[view]-0-|", options: [], metrics: nil, views: viewsDictionary))

        self.view.addSubview(tableView)
        
        ...
        
    }
    ...
}