JSON Parsing in Swift 3

Question

Has anyone been able to find a way to parse through JSON files in Swift 3? I have been able to get the data to return but I am unsuccessful when it comes to breaking the dat

Answer 1

JSON Parsing in swift 4 using Decodable Protocol :

I create a mocky file using your json object :

http://www.mocky.io/v2/5a280c282f0000f92c0635e6

Here is the code to parse the JSON :

Model Creation :

import UIKit

struct Item : Decodable { 
// Properties must be the same name as specified in JSON , else it will return nil
var Number : String
var Name : String
}

struct Language : Decodable {
 var Field : [Item]
}

struct Result : Decodable {
 var Language : Language
}

You can use optional in the model if you are uncertain that something might be missing in JSON file.

This is the parsing Logic :

class ViewController: UIViewController {

let url = "http://www.mocky.io/v2/5a280c282f0000f92c0635e6"

private func parseJSON() {

    guard let url = URL(string: url) else { return }

    let session = URLSession.shared.dataTask(with: url) { (data, response, error) in
        guard let data = data else { return }
        guard let result = try? JSONDecoder().decode(Result.self, from: data) else { return }
        print("\n\nResult : \(result)")
    }
    session.resume()
}

override func viewDidLoad() {
    super.viewDidLoad()
    parseJSON()
}
}

The Print Output :

 Result : Result(Language: JSON_Parsing.Language(Field: [JSON_Parsing.Item(Number: "976", Name: "Test"), JSON_Parsing.Item(Number: "977", Name: "Test")]))

This the github Project link. You can check.