if let statusesArray = try? JSONSerialization.jsonObject(with: data, options: .allowFragments) as? [[String: Any]],
    let user = statusesArray[0]["user"] as? [String: Any],
    let username = user["name"] as? String {
    // Finally we got the username
}

if let JSONObject = try JSONSerialization.jsonObject(with: data, options: .allowFragments) as? [[String: Any]],
    let username = (JSONObject[0]["user"] as? [String: Any])?["name"] as? String {
        // There's our username
}

let json = JSON(data: dataFromNetworking)
if let userName = json[0]["user"]["name"].string {
  //Now you got your value
}

let json = JSON(data: dataFromNetworking)
let result = json[999999]["wrong_key"]["wrong_name"]
if let userName = result.string {
    //Calm down, take it easy, the ".string" property still produces the correct Optional String type with safety
} else {
    //Print the error
    print(result.error)
}

// swift-tools-version:4.0
import PackageDescription

let package = Package(
    name: "YOUR_PROJECT_NAME",
    dependencies: [
        .package(url: "https://github.com/SwiftyJSON/SwiftyJSON.git", from: "4.0.0"),
    ]
)

import SwiftyJSON

let json = JSON(data: dataFromNetworking)

let json = JSON(jsonObject)

if let dataFromString = jsonString.data(using: .utf8, allowLossyConversion: false) {
    let json = JSON(data: dataFromString)
}

// Getting a double from a JSON Array
let name = json[0].double

// Getting an array of string from a JSON Array
let arrayNames =  json["users"].arrayValue.map {$0["name"].stringValue}

// Getting a string from a JSON Dictionary
let name = json["name"].stringValue

// Getting a string using a path to the element
let path: [JSONSubscriptType] = [1,"list",2,"name"]
let name = json[path].string
// Just the same
let name = json[1]["list"][2]["name"].string
// Alternatively
let name = json[1,"list",2,"name"].string

// With a hard way
let name = json[].string

// With a custom way
let keys:[JSONSubscriptType] = [1,"list",2,"name"]
let name = json[keys].string

// If json is .Dictionary
for (key,subJson):(String, JSON) in json {
   // Do something you want
}

// If json is .Array
// The `index` is 0..
for (index,subJson):(String, JSON) in json {
    // Do something you want
}

let json = JSON(["name", "age"])
if let name = json[999].string {
    // Do something you want
} else {
    print(json[999].error!) // "Array[999] is out of bounds"
}

let json = JSON(["name":"Jack", "age": 25])
if let name = json["address"].string {
    // Do something you want
} else {
    print(json["address"].error!) // "Dictionary["address"] does not exist"
}

let json = JSON(12345)
if let age = json[0].string {
    // Do something you want
} else {
    print(json[0])       // "Array[0] failure, It is not an array"
    print(json[0].error!) // "Array[0] failure, It is not an array"
}

if let name = json["name"].string {
    // Do something you want
} else {
    print(json["name"])       // "Dictionary[\"name"] failure, It is not an dictionary"
    print(json["name"].error!) // "Dictionary[\"name"] failure, It is not an dictionary"
}

// NSNumber
if let id = json["user"]["favourites_count"].number {
   // Do something you want
} else {
   // Print the error
   print(json["user"]["favourites_count"].error!)
}

// String
if let id = json["user"]["name"].string {
   // Do something you want
} else {
   // Print the error
   print(json["user"]["name"].error!)
}

// Bool
if let id = json["user"]["is_translator"].bool {
   // Do something you want
} else {
   // Print the error
   print(json["user"]["is_translator"].error!)
}

// Int
if let id = json["user"]["id"].int {
   // Do something you want
} else {
   // Print the error
   print(json["user"]["id"].error!)
}
...

// If not a Number or nil, return 0
let id: Int = json["id"].intValue

// If not a String or nil, return ""
let name: String = json["name"].stringValue

// If not an Array or nil, return []
let list: Array = json["list"].arrayValue

// If not a Dictionary or nil, return [:]
let user: Dictionary<String, JSON> = json["user"].dictionaryValue

json["name"] = JSON("new-name")
json[0] = JSON(1)

json["id"].int =  1234567890
json["coordinate"].double =  8766.766
json["name"].string =  "Jack"
json.arrayObject = [1,2,3,4]
json.dictionaryObject = ["name":"Jack", "age":25]

let rawObject: Any = json.object

let rawValue: Any = json.rawValue

//convert the JSON to raw NSData
do {
	let rawData = try json.rawData()
  //Do something you want
} catch {
	print("Error \(error)")
}

//convert the JSON to a raw String
if let rawString = json.rawString() {
  //Do something you want
} else {
	print("json.rawString is nil")
}

// shows you whether value specified in JSON or not
if json["name"].exists()

// StringLiteralConvertible
let json: JSON = "I'm a json"

/ /IntegerLiteralConvertible
let json: JSON =  12345

// BooleanLiteralConvertible
let json: JSON =  true

// FloatLiteralConvertible
let json: JSON =  2.8765

// DictionaryLiteralConvertible
let json: JSON =  ["I":"am", "a":"json"]

// ArrayLiteralConvertible
let json: JSON =  ["I", "am", "a", "json"]

// With subscript in array
var json: JSON =  [1,2,3]
json[0] = 100
json[1] = 200
json[2] = 300
json[999] = 300 // Don't worry, nothing will happen

// With subscript in dictionary
var json: JSON =  ["name": "Jack", "age": 25]
json["name"] = "Mike"
json["age"] = "25" // It's OK to set String
json["address"] = "L.A." // Add the "address": "L.A." in json

// Array & Dictionary
var json: JSON =  ["name": "Jack", "age": 25, "list": ["a", "b", "c", ["what": "this"]]]
json["list"][3]["what"] = "that"
json["list",3,"what"] = "that"
let path: [JSONSubscriptType] = ["list",3,"what"]
json[path] = "that"

// With other JSON objects
let user: JSON = ["username" : "Steve", "password": "supersecurepassword"]
let auth: JSON = [
  "user": user.object, // use user.object instead of just user
  "apikey": "supersecretapitoken"
]

let original: JSON = [
    "first_name": "John",
    "age": 20,
    "skills": ["Coding", "Reading"],
    "address": [
        "street": "Front St",
        "zip": "12345",
    ]
]

let update: JSON = [
    "last_name": "Doe",
    "age": 21,
    "skills": ["Writing"],
    "address": [
        "zip": "12342",
        "city": "New York City"
    ]
]

let updated = original.merge(with: update)
// [
//     "first_name": "John",
//     "last_name": "Doe",
//     "age": 21,
//     "skills": ["Coding", "Reading", "Writing"],
//     "address": [
//         "street": "Front St",
//         "zip": "12342",
//         "city": "New York City"
//     ]
// ]

let dict = ["1":2, "2":"two", "3": nil] as [String: Any?]
let json = JSON(dict)
let representation = json.rawString(options: [.castNilToNSNull: true])
// representation is "{\"1\":2,\"2\":\"two\",\"3\":null}", which represents {"1":2,"2":"two","3":null}

Alamofire.request(url, method: .get).validate().responseJSON { response in
    switch response.result {
    case .success(let value):
        let json = JSON(value)
        print("JSON: \(json)")
    case .failure(let error):
        print(error)
    }
}

let provider = MoyaProvider<Backend>()
provider.request(.showProducts) { result in
    switch result {
    case let .success(moyaResponse):
        let data = moyaResponse.data
        let json = JSON(data: data) // convert network data to json
        print(json)
    case let .failure(error):
        print("error: \(error)")
    }
}