Trying to Restrict the Hit Area of my Button to the Defined Circle across Classes.

var _path : UIBezierPath!
var _button : DrawButton

init (_path: UIBezierPath!, _button: DrawButton) {
    self._path = _path
    self._button = _button
}

required init(coder aDecoder: NSCoder) {
    fatalError("init(coder:) has not been implemented")
}

func createCirclularPathButton(imageView_that_is_being_annimated_on: UIImageView, delegate: ButtonDelegate, x_of_origin: CGFloat, y_of_origin: CGFloat, width_of_oval: CGFloat, height_of_oval: CGFloat, want_line: Bool, line_width: CGFloat?=nil, line_color: UIColor?=nil) -> UIButton
{

    var rect = CGRect(origin: CGPoint(x: x_of_origin, y: y_of_origin), size: CGSize(width: width_of_oval, height: height_of_oval))

   _button.frame = rect
    _button.layer.cornerRadius = height_of_oval/2.0
    _button.clipsToBounds = true

     _path = UIBezierPath(ovalInRect: rect) 

    _button.addTarget(delegate, action: "Tap:", forControlEvents: UIControlEvents.TouchUpInside)

    if want_line == true {
        let line = CAShapeLayer()
        if let lineWidthForUse = line_width {
            line.lineWidth = line_width!
            if let lineColorForUse = line_color {
                line.fillColor = UIColor.clearColor().CGColor
                line.strokeColor = line_color!.CGColor

                line.path = _path.CGPath
                imageView_that_is_being_annimated_on.layer.addSublayer(line)
            }
        }
    }
    return _button
}

 override func layoutSubviews() {
    super.layoutSubviews()
    var _path = UIBezierPath(ovalInRect: self.bounds)
}

override func pointInside(point: CGPoint, withEvent event: UIEvent?) -> Bool {
    return _path.containsPoint(point)
}

override func viewDidLoad() {
    super.viewDidLoad()

    var drawButton = DrawButton(_button: newButton)
     // Obviously this is going to throw an error because I have not defined  newButton yet, but I'm having trouble constructing the logic between the two classes

    var newButton = drawButton.createCirclularPathButton(imageView, delegate: self, x_of_origin: 100, y_of_origin: 225, width_of_oval: 150, height_of_oval: 150, want_line: true, line_width: 1, line_color: UIColor.blueColor())

    imageView.userInteractionEnabled = true
    imageView.addSubview(newButton)