枚举中关于toRaw()和fromRaw(3)编译出错

swift 版本问题

let friday = WeekDays.Friday.toRaw()改为let friday = WeekDays.Friday.rawValue

let thursday = WeekDays.fromRaw(3)改为let thursday = WeekDays.init(rawValue: 3)

if (WeekDays.Friday.toRaw() == 4) { 改为if (WeekDays.Friday.rawValue == 4) {

“方法toRaw()”改为“属性rawValue”。

“toRaw()方法”改为“rawValue属性”，“fromRaw()方法”改为init(rawValue:3)”