如何在swift4中解析对象内的JSON数组

Question

I'M using tableview to parsing JSON data. the parse data in tableview in successful parsed on my tableView but the problem is users click the tableview cell to pass to details ViewController.But the problem is i can't parse JSON in details ViewController in

here is my JSON looks

[
{
    "id": "263",
    "userId": "2692"
 }
 ]

here is my code

  guard let url = URL(string: URL API) else { return }
    var request = URLRequest(url: url)
    request.addValue("application/json", forHTTPHeaderField: "Content-Type")
    request.addValue("Bearer \(AccessToken!)", forHTTPHeaderField: "Authorization")
    request.httpMethod = "GET"

    let session = URLSession.shared
    session.dataTask(with: request) { (data, response, error) in 
    do {
            let json = try JSONSerialization.jsonObject(with: data!, options: []) as? [string: anyobject]

                print(json)
         label.text = json["id"] as? string

        }catch {


        }

 }.resume()                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

Answer 1

Please try this codes

do {
   if let json = try JSONSerialization.jsonObject(with: data!) as? [[String: String]] {
      for data in json {

          label.text  = data["id"] as? String
      }
   }
} catch { print(error) }

Answer 2

Parse json in swift4 using Codable protocol. declare your model like this:

struct Model: Codable {
    let id: Double
    let userId: Double

    enum CodingKeys : String, CodingKey {
        case id = "id"
        case userId = "userId"
    }
}

then, after getting data, use this:

do {
    let arrayValue = try JSONDecoder().decode([Model], from: data)
} 
catch {
}

Note that your json is array not dictionary!