【Swift UI】ColorからRGBA値を取得する方法！getRedメソッド

UIColor(red: 0.8, green: 0.2, blue: 0.5, alpha: 1)
Color(red: 0.8, green: 0.2, blue: 0.5, opacity: 1)

extension Color {
  func toRGBA() -> (red: CGFloat, green: CGFloat, blue: CGFloat, alpha: CGFloat) {
      let uiColor = UIColor(self)
      var red: CGFloat = 0
      var green: CGFloat = 0
      var blue: CGFloat = 0
      var alpha: CGFloat = 0
      uiColor.getRed(&red, green: &green, blue: &blue, alpha: &alpha)
      return (red: red, green: green, blue: blue, alpha: alpha)
  }
}

func getRed(
    _ red: UnsafeMutablePointer<CGFloat>?,
    green: UnsafeMutablePointer<CGFloat>?,
    blue: UnsafeMutablePointer<CGFloat>?,
    alpha: UnsafeMutablePointer<CGFloat>?
) -> Bool