Another naiive UILabel extension to change font globally

naiiveUILabelExtensionWithBold.swift

 extension UILabel {
    @objc var substituteFontName: String {
        get {
            return font.fontName
        }
        set {
            // Called at every UILabel initialization
            font = UIFont(name: newValue, size: font.pointSize)
        }
    }
    @objc var substituteBoldFontName: String {
        get {
            return font.fontName
        }
        set {
            // Called at every UILabel initialization
            font = UIFont(name: newValue, size: font.pointSize) 
        }
    }
 }