无法解析API，需要转换为JSON对象-错误

我试图遵循这个API文档，它声明传入API密钥和json对象，尽管它不断返回错误

它说请求的内容必须是一个JSON对象，并且成分必须是一个数组

我不知道我是做错了还是API坏了。我确实得到了另一个API调用来工作，但营养素部分没有

curl -d @food.json -H "Content-Type: application/json" "https://api.edamam.com/api/food-database/nutrients?app_id=${YOUR_APP_ID}&app_key=${YOUR_APP_KEY}" 

{
    "yield": 1,
    "ingredients": [
        {
            "quantity": 1,
            "measureURI": "http://www.edamam.com/ontologies/edamam.owl#Measure_unit",
            "foodURI": "http://www.edaman.com/ontologies/edamam.owl#Food_USDABR_45039390"
        }
    ]
}

在我的代码中，我得到的是：

let json: [String: Any] = [
                           "ingredients": ["quantity":1,
                                           "measureURI":"http://www.edamam.com/ontologies/edamam.owl#Measure_pound",
                                           "foodURI" : "http://www.edaman.com/ontologies/edamam.owl#Food_USDABR_45039390"]]

let jsonData = try? JSONSerialization.data(withJSONObject: json)

// Nutrition API
let app_id = "51fkkff"
let app_key = "6503a430030768824iidkos03d431d94"


let urlString = String(format: "https://api.edamam.com/api/food-database/nutrients?app_id=%@&app_key=%@", app_id, app_key)
let url = URL(string: urlString)!

var request = URLRequest(url: url)
request.httpMethod = "POST"
request.addValue("application/json", forHTTPHeaderField: "Content-Type")

request.httpBody = jsonData



let task = URLSession.shared.dataTask(with: request) { data, response, error in
    guard let data = data, error == nil else {
        print(error?.localizedDescription ?? "No data")
        return
    }
    let responseJSON = try? JSONSerialization.jsonObject(with: data, options: [])
    if let responseJSON = responseJSON as? [String: Any] {
        print(responseJSON)
    }
}

task.resume()

---

错误消息：[消息：无法解析实体，错误：错误请求]

当我将此与API文档进行比较时，我可以看到两个需要修复的错误：

你错过了产量领域。 配料应该是一个数组。 我刚刚用这个JSON对象进行了测试，效果很好：

let json: [String: Any] = [
  "yield": 1,
  "ingredients": [
    [
      "quantity": 1,
      "measureURI": "http://www.edamam.com/ontologies/edamam.owl#Measure_pound",
      "foodURI": "http://www.edamam.com/ontologies/edamam.owl#Food_USDABR_45039390"
    ]
  ]
]

---

您需要通过JSONSerialization。Swift 4有JSONECODER。@马特，我不是在解码，我是在编码，然后是JSONECODER。甚至更好。是时候结束JSONSerialization了。