Generate random UIColor in swift

randomColor.swift

/* usage:
 *    UIColor.randomColor()
 */
extension UIColor {
    class func randomColor() -> UIColor{
        let r:CGFloat = CGFloat(drand48())
        let g:CGFloat = CGFloat(drand48())
        let b:CGFloat = CGFloat(drand48())
        
        return UIColor(red: r, green: g, blue: b, alpha: 1.0)
    }
}