swift 4 - available fonts

available-fonts.swift

func printFonts() {
            let fontFamilyNames = UIFont.familyNames
            for familyName in fontFamilyNames {
                print("------------------------------")
                print("Font Family Name = [\(familyName)]")
                let names = UIFont.fontNames(forFamilyName: familyName)
                print("Font Names = [\(names)]")
            }
        }