             superView.addConstraint(bottomMarginConstraint!)
             superView.addConstraint(topMarginConstraint!)
 
-            topMarginConstraint?.active = false
+            topMarginConstraint?.isActive = false
             
             // Show
             showWithAnimation()

    }

    /// Icon image content 
    public dynamic var iconContentMode: UIViewContentMode = .Center {
        didSet {
            iconImageView.contentMode = iconContentMode
        }

    }

    /// Message text color. Default is white.
    public dynamic var messageTextColor: UIColor = UIColor.white {
        didSet {
            messageLabel.textColor = messageTextColor
        }
    }

    /// Message text font. Default is Bold system font (14).
    public dynamic var messageTextFont: UIFont = UIFont.boldSystemFont(ofSize: 14) {
        didSet {
            messageLabel.font = messageTextFont
        }
    }

    /// Message text alignment. Default is left
    public dynamic var messageTextAlign: NSTextAlignment = .left {
        didSet {
            messageLabel.textAlignment = messageTextAlign
        }
