How to get .adjustsFontSizeToFitWidth to function properly

Question

With this simple code, I was assuming that getting "Hello World!" to automatically shrink would work with bannerLabel.adjustsFontSizeToFitWidth but the end of the text is clipped with ... How do you get it to work properly?

import UIKit

class ViewController: UIViewController, UIGestureRecognizerDelegate {

    @IBOutlet weak var bannerLabel: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()

        bannerLabel.adjustsFontSizeToFitWidth = true
        bannerLabel.numberOfLines = 1
        bannerLabel.text = "Hello World!"
        bannerLabel.font = UIFont(name: bannerLabel.font.fontName, size: 150)!

    }

Answer 1

titleLabel?.numberOfLines = 1 
titleLabel?.adjustsFontSizeToFitWidth = true
titleLabel?.minimumScaleFactor = 0.1