增加了 3 種新的寬度樣式：compressed、condensed與expanded，加上默認的standard，目前 UIFont 共有 4 種字體寬度。寬度大小關(guān)系為：expanded > standard > condensed > compressed。

//  Created by YungFan
import UIKit

class ViewController: UIViewController {
    // 定義4種寬度不同的字體
    let expanded = UIFont.systemFont(ofSize: 27, weight: .bold, width: .expanded)
    let standard = UIFont.systemFont(ofSize: 27, weight: .bold, width: .standard)
    let condensed = UIFont.systemFont(ofSize: 27, weight: .bold, width: .condensed)
    let compressed = UIFont.systemFont(ofSize: 27, weight: .bold, width: .compressed)

    lazy var expandedLabel: UILabel = {
        let label = UILabel(frame: CGRect(x: 10, y: 100, width: 360, height: 40))
        label.text = "Xcode14 and iOS16"
        label.font = expanded
        return label
    }()

    lazy var standardLabel: UILabel = {
        let label = UILabel(frame: CGRect(x: 10, y: 150, width: 360, height: 40))
        label.text = "Xcode14 and iOS16"
        label.font = standard
        return label
    }()

    lazy var condensedLabel: UILabel = {
        let label = UILabel(frame: CGRect(x: 10, y: 200, width: 360, height: 40))
        label.text = "Xcode14 and iOS16"
        label.font = condensed
        return label
    }()

    lazy var compressedLabel: UILabel = {
        let label = UILabel(frame: CGRect(x: 10, y: 250, width: 360, height: 40))
        label.text = "Xcode14 and iOS16"
        label.font = compressed
        return label
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        view.addSubview(expandedLabel)
        view.addSubview(standardLabel)
        view.addSubview(condensedLabel)
        view.addSubview(compressedLabel)
    }
}