How To Add Dynamic Font Size about Multi Device in Xcode Storyboard

I added autoLayout in storyboard (w: Any, h: Any)

But because of fixed font size, The font size is same in all of devices (4, 4.7, 5.5 inch)

It looks nice in 4 inch. But in 5.5 inch, That's too small

I want to dynamically inclease and decrease UIlabel font size in any devices.

Any Ideas?

I Found Solution

I Made one Class

class UILabelDeviceClass : UILabel {

@IBInspectable var iPhoneFontSize:CGFloat = 0 {
    didSet {
        overrideFontSize(iPhoneFontSize)
    }
}

func overrideFontSize(fontSize:CGFloat){
    let currentFontName = self.font.fontName
    var calculatedFont: UIFont?
    let bounds = UIScreen.mainScreen().bounds
    let height = bounds.size.height
    switch height {
    case 480.0: //Iphone 3,4,SE => 3.5 inch
        calculatedFont = UIFont(name: currentFontName, size: fontSize * 0.7)
        self.font = calculatedFont
        break
    case 568.0: //iphone 5, 5s => 4 inch
        calculatedFont = UIFont(name: currentFontName, size: fontSize * 0.8)
        self.font = calculatedFont
        break
    case 667.0: //iphone 6, 6s => 4.7 inch
        calculatedFont = UIFont(name: currentFontName, size: fontSize * 0.9)
        self.font = calculatedFont
        break
    case 736.0: //iphone 6s+ 6+ => 5.5 inch
        calculatedFont = UIFont(name: currentFontName, size: fontSize)
        self.font = calculatedFont
        break
    default:
        print("not an iPhone")
        break
    }

}

}

Then, Set Class

And Then, Set Value

Happy Coding!