Enumeration and Structures in Swift

Enumerations and structures also has similar capabilities as of Classes in Swift. 

enum Rank: Int 

{

case Ace = 1

case Two, Three, Four, Five, Six, Seven, Eight, Nine, Ten

case Jack, Queen, King

func simpleDescription() -> String 

{

switch self

{

case .Ace:

return “Ace”

case .Jack:

return “Jack”

case .Queen

return “Queen”

case .King

return “King”

default:

return String(self.rawValue)

}

}

}

let ace = Rank.Ace

let rawAceRawValue = ace.rawValue

we can use the init?(rawValue:) initializer to make an instance of an enumeration from a raw value. 

if(let convertedRank = Rank(rawValue:3))

{

let desc = convertedRank.simpleDescription()

}

The raw values are not really required because the members of an enumeration are actual values. 

struct is used to define a structure. 

struct Card 

{

  var rank:Rank

var suite : Suit

func simpleDescription() -> String 

{

return “suite has \(rank.simpleDescription())”

}

}

let structinit = Card (rank:.Three, suite:.Spades) 

References:

https://developer.apple.com/library/prerelease/ios/referencelibrary/GettingStarted/DevelopiOSAppsSwift/Lesson1.html#//apple_ref/doc/uid/TP40015214-CH3-SW1