从嵌套 JSON 中抓取数据

Question

正在尝试获取以下 JSON 数据。除了食物营养素，我什么都能吃。当运行下面的编码时，我收到以下

结果: MealJournal.FoodNutrients（食物营养素：无）

{
   "fdcId":748967,
   "description":"Eggs, Grade A, Large, egg whole",
   "publicationDate":"12/16/2019",
   "foodNutrients":[
      {
         "type":"FoodNutrient",
         "nutrient":{
            "id":1091,
            "number":"305",
            "name":"Phosphorus, P",
            "rank":5600,
            "unitName":"mg"
         },

我该如何获取 foodNutrients？

我有以下代码，我得到了以下结果

代码：

struct FoodNutrients: Codable{
    let foodNutrients: [String]?
    
    enum CodingKeys: String, CodingKey{
        case foodNutrients = "foodNutrients"
    }
}

struct Food: Codable{
   
    let dataType: String
    let description: String
    let fdcId: Int
    let foodNutrients: [FoodNutrients]
  
}

class FoodApi {
    func getFood (){
        guard let url = URL(string: "https://api.nal.usda.gov/fdc/v1/food/748967?api_key=bRbzV0uKJyenEtd1GMgJJNh4BzGWtDvDZVOy8cqG") else { return }
        
        URLSession.shared.dataTask(with: url) { (data, _, _) in
            let results = try! JSONDecoder().decode(Food.self, from: data!)
            print(results)
        }
        .resume()
    }
    
}

Answer 1

食物营养素结构错误，需要与 json 匹配。使用 https://app.quicktype.io/ 生成正确的 classes/structs

从嵌套 JSON 中抓取数据

Grab data from nested JSON

api

json

swift

swiftui