Functions I reuse often in my apps. Swift 3.0

Functions.swift

//
//  Functions.swift
//  Repnote
//
//  Created by Jonathan Neumann on 23/03/2017.
//  Copyright © 2017 Audioy. All rights reserved.
//

import Foundation
import UIKit

// getUIColorObjectFromHex function takes HEX and Alpha converts then returns a UIColor object. Used by UIColor extension
func getUIColorObjectFromHex(_ hex:String, alpha:CGFloat) -> UIColor {
    var cString:String = hex.trimmingCharacters(in: .whitespacesAndNewlines).uppercased()
    
    if (cString.hasPrefix("#")) {
        cString = cString.substring(from: cString.characters.index(cString.startIndex, offsetBy: 1))
    }
    
    if (cString.characters.count != 6) {
        return UIColor.gray
    }
    
    var rgbValue:UInt32 = 0
    Scanner(string: cString).scanHexInt32(&rgbValue)
    
    return UIColor(
        red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,
        green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,
        blue: CGFloat(rgbValue & 0x0000FF) / 255.0,
        alpha: CGFloat(alpha)
    )
}

// GENERATE A UUID
func createUUID() -> String{
    let uuid = UUID().uuidString
    return uuid
}