Swift 字典 结构体 枚举

• 申明一个空字典

var dictionary = [Int:String]()

// [0: "zero", 1: "one"]
var dictionary = [Int:String]()
dictionary[0] = "zero"
dictionary[1] = "one"

• 字典置空

dictionary = [:]

• 结构体

struct BookInfo {
    var id = 0
    var name = ""
    var author = ""
    var type = ""
}
var book = BookInfo(id: 10010, name: "swift", author: "apple", type: "education")

• 枚举

enum CompassPoint {
    case north
    case south
    case east
    case west
}

enum HttpStatusCode : Int {
    case HttpFail = 0
    case HttpNormal = 200
    case HttpSuccess = 202
}

print(CompassPoint.east)
print(HttpStatusCode.HttpNormal)