//1.枚举类型
enum MethodType :String{
     case get = "get"
     case post = "post"
     case put = "put"
     case delete = "delete"
}

//2.创建枚举
let type1 : MethodType = .get
let type2 = MethodType.post
let type3 = MethodType(rawValue: "put")／／put
let strsde = type3?.rawValue


let btn = UIButton()
btn.setTitle("test",for: .normal)

//3.给枚举类型进行赋值
enum Direction : Int{
    case east = 0
    case west = 1
    case north = 2
    case south = 3
}

let d:Direction = .east／／east
let d2 = Direction(rawValue:1) ／／west


//4. 枚举类型定义方式二

enum type : Int{
    case east = 0,west,north,south
}