ios swift UILabel 颜色使用图片

        var myMessage:UILabel

        myMessage = UILabel(frame: CGRectMake(30,50, 300,50))

        myMessage.font =UIFont.systemFontOfSize(48)

        myMessage.text ="Hello Xcode"

        myMessage.textColor =UIColor(patternImage: UIImage(named:"background")!)

        view.addSubview(myMessage)