Relative Dimensioning in Swift Manual Layouts

CGFloat+extensions.swift

extension CGFloat {
    /**
     The relative dimension to the corresponding screen size.
     
     //Usage
     let someView = UIView(frame: CGRect(x: 0, y: 0, width: 320.dp, height: 40.dp)
     
     **Warning** Only works with size references from @1x mockups.
     
     */
    var dp: CGFloat {
        return (self / 320) * UIScreen.main.bounds.width
    }
}