Dynamic Font Size UIButton Label

UIButtonDeviceClass.swift

import Foundation
import UIKit

class UIButtonDeviceClass : UIButton {
    
    @IBInspectable var iPhoneFontSize:CGFloat = 0 {
        didSet {
            overrideFontSize(fontSize: iPhoneFontSize)
        }
    }
    
    func overrideFontSize(fontSize:CGFloat){
        let currentFontName = self.titleLabel?.font.fontName
        var calculatedFont: UIFont?
        let bounds = UIScreen.main.bounds
        let height = bounds.size.height
        print("height:", height)
        switch height {
        case 480.0: //iphone 4,4s,SE
            calculatedFont = UIFont(name: currentFontName!, size: fontSize * 0.85)
            self.titleLabel?.font = calculatedFont
            break
        case 568.0: //iphone 5, 5s
            calculatedFont = UIFont(name: currentFontName!, size: fontSize * 0.9)
            self.titleLabel?.font = calculatedFont
            break
        case 667.0: //iphone 6, 6s, 7, 8
            calculatedFont = UIFont(name: currentFontName!, size: fontSize)
            self.titleLabel?.font = calculatedFont
            break
        case 736.0: //iphone 6s+, 6+, 7+, 8+
            calculatedFont = UIFont(name: currentFontName!, size: fontSize * 1.0)
            self.titleLabel?.font = calculatedFont
            break
        case 812.0: //iphone x/xs/11pro
            calculatedFont = UIFont(name: currentFontName!, size: fontSize * 1.05)
            self.titleLabel?.font = calculatedFont
            break
        case 896.0: //iphone xr/xs max/11/11promax
            calculatedFont = UIFont(name: currentFontName!, size: fontSize * 1.2)
            self.titleLabel?.font = calculatedFont
            break
        case 1024.0: //ipad 5thGen, 6thGen, air, air2, pro9.7inch
            calculatedFont = UIFont(name: currentFontName!, size: fontSize * 1.25)
            self.titleLabel?.font = calculatedFont
            break
        case 1112.0: //ipad pro10.5inch
            calculatedFont = UIFont(name: currentFontName!, size: fontSize * 1.28)
            self.titleLabel?.font = calculatedFont
            break
        case 1194.0: //ipad pro11inch
            calculatedFont = UIFont(name: currentFontName!, size: fontSize * 1.31)
            self.titleLabel?.font = calculatedFont
            break
        case 1366.0: //ipad pro12.9inch1stGen, pro12.9inch2ndGen, pro12.9inch3rdGen
            calculatedFont = UIFont(name: currentFontName!, size: fontSize * 1.45)
            self.titleLabel?.font = calculatedFont
            break
        default:
            print("Not an iPhone")
            break
        }
    }
    
}