swiftのjson読み込み

Foundationに含まれているJSONSerializationを使う

JSON文字列をパースするには、JSONSerialization.jsonObjectを使用する。

JSONSerializationJ .jsonObject(with JSONデータ: Data, options オプション)

import Foundation 
import CryptoSwift 

let jsonString: String = "{\"id\":3932, \"company\":\"Akatsuki\"}"

var personalData: Data = jsonString.data(using: String.Encoding.utf8)!

do {
    let items = try JSONSerialization.jsonObject(with: personalData) as! Dictionary<String,Any>
    print(items["id"] as! Int)
    print(items["company"] as! String)
} catch {
    print(error)
}

3932
Akatsuki

書き方を変える。

let jsonString: String = "{\"id\":3932, \"company\":\"Akatsuki\"}"

var personalData: Data = jsonString.data(using: String.Encoding.utf8)!
let items = try JSONSerialization.jsonObject(with: personalData) as! Dictionary<String,Any>
var code:Int = items["id"] as! Int
print(code)

3932

ではXcodeに当てはめましょう。
そもそも、import Foundationって、xcodeに使えるのか？

swift foundation
https://github.com/apple/swift-corelibs-foundation
The Foundation framework defines a base layer of functionality that is required for almost all applications. It provides primitive classes and introduces several paradigms that define functionality not provided by either the Objective-C runtime and language or Swift standard library and language.

よくわかりませんが、やってみましょう。