enum methodType{

    case get

    case post

    case put

    case delete

}

枚举赋值

enum methodType:String{

    case get="get"

    case post="post"

    case put="put"

    case delete="delete"

}

let type:methodType = .get

let type2 = methodType.post

let type3 = methodType(rawValue: "put")// 返回一个可选类型 值/nil

let str=type3?.rawValue//打印字符串 "put"

print(type)

//省略写法

enum Direction:Int{

    case east=0,west,north,south

}

print(Direction.north)