Swift 枚举

概述// 枚举的定义enum Day { case sunday case monday case tuesday case wednesday case thursday case friday case saturday}let day = Day.mondayfunc getDayStatus(day:Day)->Void {

// 枚举的定义enum Day {    case sunday    case monday    case tuesday    case wednesday    case thursday    case frIDay    case saturday}let day = Day.mondayfunc getDayStatus(day:Day)->VoID {    switch day {    case Day.sunday,Day.saturday:        print("Rest Day")        break    default:        print("Work Day")        break            }}getDayStatus(day: day)

给枚举附上原始值

// 枚举的定义,给枚举附上原始值enum Day: Int {    case sunday = 0    case monday = 1    case tuesday = 2    case wednesday = 3    case thursday = 4    case frIDay = 5    case saturday = 6}func daysBeforeNewWeek(day:Day) ->Int {    return 7 - day.rawValue}daysBeforeNewWeek(day: Day.monday) // 离新的星期还有几天

枚举可以有方法，这就厉害了我的Swift

// 枚举的定义,给枚举附上原始值enum Day: Int {    case sunday = 0    case monday = 1    case tuesday = 2    case wednesday = 3    case thursday = 4    case frIDay = 5    case saturday = 6        func isWorkDay() -> Bool {        switch self {        case .monday,.tuesday,.wednesday,.thursday,.frIDay:            return true        default:            return false        }    }}var day = Day.frIDayday.isWorkDay()

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