"Swift-Summary" enumeration

Declaring enumerations

enum Direction {    case North    case East    case West    case South}

You can also use a case

enum Direct {    case North, East, South}

Using enumerations

var dirct = Direction.East.West

Related values

You can use an enumeration to store any related reference

enum PersonInfo {    case Age(Int)    case Name(String)}

var person = PersonInfo.Name("ttf")switch person {case .Age(let age)://获得这个值    print("person‘s age is \(age)")case .Name(let name):    print("person‘name is \(name)")}

Enumeration with initial values

/**以字符为初始值的枚举*/enum DirWithChar: Character {    case"\t"    case"\n"    case"\0"    case"\r"}

/**以Int为初始值的枚举*/enum DirWithInt: Int {    case0    case West    case East    case South}

Get the initial value

let dirValue = DirWithInt.East.rawValue

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"Swift-Summary" enumeration