Swift 3 - How to write functions with no initialisers like the new UIColors?

Question

In previous versions of swift, you would get the colour white like this UIColor.whiteColor()

However, in Swift 3, you get the colour white without initi

Answer 1

.whiteColor() is a static method (type method) on UIColor, whereas .white is a static (computed in my example) property on UIColor. The difference in defining them looks like:

struct Color {
  let red: Int
  let green: Int
  let blue: Int

  static func whiteColor() -> Color {
    return Color(red: 255, green: 255, blue: 255)
  }

  static var white: Color {
    return Color(red: 255, green: 255, blue: 255)
  }
}