CODEWITHSUNDEEP
iosjsonswiftparsing
Alexander Spirichev
Alexander Spirichev

Reputation: 478

How to parse enum with JASON pod?

I get JSON from a server. For parsing, I use JASON library. How can I parse JSON with enum value?

Example:

{
        ...
    "first_name": "John",
    "last_name": "Doe",
    "user_type": "basic"
        ...
}

Where 'user_type':

enum UserType {
  case basic
  case pro
}

Does anyone have any idea?

Upvotes: 1

Views: 400

Answers (3)

FuzzzzyBoy
FuzzzzyBoy

Reputation: 228

If you work with Swift 4 there is useful default JSONDecoder. With your example:

import Foundation

let  jsonDict = [
"first_name": "John",
"last_name": "Doe",
"user_type": "basic"
]

let jsonData = try! JSONSerialization.data(withJSONObject: jsonDict, options: [])

enum UserType: String, Codable {
    case basic
    case pro
}

struct User: Codable {
    let firstName : String
    let lastName: String
    let userType: UserType

enum CodingKeys : String, CodingKey {
    case firstName = "first_name"
    case lastName = "last_name"
    case userType = "user_type"
    }
}

let decoder = JSONDecoder()
let user = try! decoder.decode(User.self, from: jsonData)

print(user)

Upvotes: 0

user8201439
user8201439

Reputation:

If you want to store value of user_type in enum:

Change your enum variable type into string:

enum UserType: String {
  case basic = "basic"
  case pro = "pro"
}

Solution, without using JASON

Store your JSON into dictionary type variable:

let jsonVar = [
    "first_name": "John",
    "last_name": "Doe",
    "user_type": "basic"
] as [String : Any]

Now, get a value from dictionary variable and create enum variable using raw value:

if let user_type = jsonVar["user_type"] as? String {
   let usertype = UserType(rawValue: user_type)
}

Solution, using JASON

let json = [
    "first_name": "John",
    "last_name": "Doe",
    "user_type": "basic"
] as AnyObject


let jasonVar = JSON(json) 

if let user_type:String = jasonVar["user_type"].string {
   let usertype = UserType(rawValue: user_type)
}

Upvotes: 2

i3lai3la
i3lai3la

Reputation: 980

Copied from How to get enum from raw value in Swift?

 enum TestEnum: String {
      case Name = "Name"
      case Gender = "Gender"
      case Birth = "Birth Day"
    }

    let name = TestEnum(rawValue: "Name")!       //Name
    let gender = TestEnum(rawValue: "Gender")!   //Gender
    let birth = TestEnum(rawValue: "Birth Day")! //Birth

Upvotes: 0

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