@IBAction func action(sender: UIButton!) {

    let stringAttributes = [
        NSFontAttributeName: UIFont.boldSystemFontOfSize(14.0),
        NSBackgroundColorAttributeName: UIColor.redColor(),
    ]
    let attributedString = NSMutableAttributedString(string: "Hello world!", attributes: stringAttributes)

    let string: String = {
        let s = String(attributedString)
        return s
    }()

    let pasteboard = UIPasteboard.generalPasteboard()
    pasteboard.string = string
}