How can I decode this json with Alamofire?

Question

I want to print just value for key "User_number"

 [
   {
     "User_fullname": null,
     "User_sheba": null,
     "User_modifiedAT": "2019-01-31T18:37:02.716Z",
     "_id": "5c53404e91fc822c80e75d23",
     "User_number": "9385969339",
     "User_code": "45VPMND"
   }
 ]

Answer 1

I suppose this is some JSON in Data format

let data = Data("""
[ { "User_fullname": null, "User_sheba": null, "User_modifiedAT": "2019-01-31T18:37:02.716Z", "_id": "5c53404e91fc822c80e75d23", "User_number": "9385969339", "User_code": "45VPMND" } ]
""".utf8)

One way is using SwiftyJSON library, but, this is something what I don't suggest since you can use Codable.

---

So, first you need custom struct conforming to Decodable (note that these CodingKeys are here to change key of object inside json to name of property of your struct)

struct User: Decodable {

    let fullname, sheba: String? // these properties can be `nil`
    let modifiedAt, id, number, code: String // note that all your properties are actually `String` or `String?`

    enum CodingKeys: String, CodingKey {
        case fullname = "User_fullname"
        case sheba = "User_sheba"
        case modifiedAt = "User_modifiedAT"
        case id = "_id"
        case number = "User_number"
        case code = "User_code"
    }
}

then decode your json using JSONDecoder

do {
    let users = try JSONDecoder().decode([User].self, from: data)
} catch { print(error) }

---

So, now you have Data decoded as array of your custom model. So if you want to, you can just get certain User and its number property

let user = users[0]
let number = user.number

Answer 2

The following code takes takes in Data and saves "User_number" as an Int

if let json = try? JSONSerialization.jsonObject(with: Data!, options: []) as! NSDictionary {
    let User_number= json["User_number"] as! Int
}