title: Swift font.withSize not changing font size on UILabel
body: <p>I was having trouble changing font size in my project, so I made a playground. No matter where I put the font.withSize property, the simulator does not reflect the font size change.</p>
  
  <pre><code>import UIKit
  import PlaygroundSupport
  
      class MyViewController : UIViewController {
          override func loadView() {
              let view = UIView()
              view.backgroundColor = .white
  
              let label = UILabel()
              label.font.withSize(80)
              label.frame = CGRect(x: 150, y: 200, width: 200, height: 20)
              label.text = "Hello Mom!"
              label.textColor = .black
  
  
  
              view.addSubview(label)
              self.view = view
          }
      }
  </code></pre>