         sliderFillView.backgroundColor = tintColor
         
         handleLabel.frame = CGRectMake(0, 0, handleWidth, handleHeight)
-        handleLabel.text = "37"
+        handleLabel.text = ""
         handleLabel.textAlignment = NSTextAlignment.Center
         handleLabel.textColor = UIColor.whiteColor()
         handleLabel.font = UIFont.systemFontOfSize(11, weight: UIFontWeightBold)


    override func cancelTrackingWithEvent(event: UIEvent?) {
        super.cancelTrackingWithEvent(event)
        print("cancel tracking")
    }
    
    

    var disabled:Bool = false {
        didSet {
            sliderBackgroundView.alpha = disabled ? 0.4 : 1.0
            self.userInteractionEnabled = !disabled
        }
    }
    
