let starView = StarRatingView()
let attribute = StarRatingAttribute(type: .rate,
      point: 30,
      spacing: 10,
      emptyColor: .red,
      fillColor: .blue,
      emptyImage: nil,
      fillImage: nil)
starView.configure(attribute, current: 0, max: 5)
starView.delegate = self
self.view.addSubview(starView)

func StarRatingValueChanged(view: StarRatingView, value: CGFloat) {
  // use value
}

// A delegate for receiving values.
public weak var delegate: StarRatingDelegate?

// A type that represents a value.
// There are three kinds. (rate, half, fill)
public var type: StarRatingType

// The current value.
public var current: CGFloat

// The maximum number of stars.
public var max: Int

// The spacing between stars.
public var spacing: CGFloat

// The size of the star.
// The horizontal and vertical sizes are the same.
public var point: CGFloat

// The color value of the empty star.
public var emptyColor: UIColor

// The color value of the full star.
public var fillColor: UIColor

// The image object of the empty star.
var emptyImage: UIImage?

// The image object of the full star.
var fillImage: UIImage?