title: adjust font size to width on dynamically resizing button, button doesn't have a width static constraint
body: <p>I have three buttons that end up pretty close together when in iPad adaptability mode, but then far apart when in iPad or iPhone landscape. I have the buttons scale correctly using static trailing/leading/bottom space constraints and their height is set proportional to the view height. The buttons resize nicely but I have to set all the button label font sizes programmatically for different screen sizes in viewdidload. I was hoping I could add resizable title labels functionality in my class but I cant seem to lock it in. </p>
  
  <p>Any help would be appreciated.</p>
  
  <p>My custom button class:</p>
  
  <pre><code>    import UIKit
  
  class BetterButton: UIButton {
  
  required public init?(coder aDecoder: NSCoder) {
  
      super.init(coder: aDecoder)
  
      self.titleLabel!.font = UIFont(name: "Marker Comp", size: 200)
      self.titleLabel?.minimumScaleFactor = 0.5
      self.titleLabel?.numberOfLines = 0
      self.titleLabel?.adjustsFontSizeToFitWidth = true
  
      self.layer.cornerRadius = 4
      self.layer.shadowOpacity = 1
      self.layer.shadowOffset = CGSize(width: 0.0, height: 2.0)
      self.layer.shadowRadius = 0
      self.layer.shadowColor = UIColor(red: 0, green: 0, blue: 0, alpha: 0.25).cgColor
  
  }
  
  }
  </code></pre>
  
  <p>All the buttons text is at 200 at runtime, but the adjust to width doesn't activate.</p>