Objective C Setter overriding in Swift

In Swift the solution above worked for me, but I had to omit the Bool = true:

import UIKit

class CustomUIButtonForUIToolbar: UIButton {

    // Only override drawRect: if you perform custom drawing.
    // An empty implementation adversely affects performance during animation.
    override func drawRect(rect: CGRect) {
        // Drawing code
        super.drawRect(rect)

        self.layer.borderColor = UIColor.blueColor().CGColor
        self.layer.borderWidth = 1.0
        self.layer.cornerRadius = 5.0
        self.clipsToBounds = true
        self.setTitleColor(UIColor.blueColor(), forState: UIControlState.Normal)

        self.setTitleColor(UIColor.whiteColor(), forState: UIControlState.Highlighted)
    }

    override var highlighted: Bool {
        didSet {

            if (highlighted) {
                self.backgroundColor = UIColor.blueColor()
            }
            else {
                self.backgroundColor = UIColor.clearColor()
            }

        }
    }

}