ConstraintViewController

constraintViewController.swift

import UIKit

class ViewController: UIViewController {

  let titleLabel: UILabel = {
      let label = UILabel()
      label.text = "Hello Constraints"
      label.backgroundColor = .red
      label.translatesAutoresizingMaskIntoConstraints = false
      return label
  }()

  let hiButton: UIButton = {
      let button = UIButton()
      button.setTitle("Hi!", for: .normal)
      button.backgroundColor = .blue
      button.translatesAutoresizingMaskIntoConstraints = false
      return button
  }()

  override func viewDidLoad() {
      super.viewDidLoad()
      view.backgroundColor = .white
      // CALL ONE OF THE SETUPS HERE
  }
}