gistfile1.swift

 override func reverseTransformedValue(value: AnyObject!) -> AnyObject {
        let data = value as! NSData
        var components:[CGFloat] = [CGFloat](count: 4, repeatedValue:0)
        var length=sizeofValue(components)
        data.getBytes(&components, length: length)
        let color = UIColor(red: components[0],
            green: components[1],
            blue: components[2],
            alpha: components[3])
        
        return color
}