在Swift中循环遍历JSON对象 [英] Looping through JSON object in Swift

问题描述

我得到了这个JSON对象，该对象已从服务器发送到我的Swift应用程序.

I got this JSON object which I sent from my server to my Swift application.

{
  "625289": {
    "id": 1,
    "subject": "Hello World"
  },
  "625277": {
    "id": 2,
    "subject":"Bye World!"
  }
}

因此，我尝试通过在我的Swift类中进行以下操作来获取每个结果("625289"和"625277")的主题:

So i tried to get the subject for each result ("625289" and "625277") by doing as below in my Swift class:

struct Resultat : Decodable   {
  let subject: String
}

var result = [Resultat]()
let urlll = URL(string:"http://localhost:8888/api/pouet.php")

URLSession.shared.dataTask(with: urlll!) { (data, response, error) in
  do {
    print("coucoulol")
    //print(response)

    self.result = try JSONDecoder().decode([Resultat].self, from: data!)

    print(self.result)

    for eachTicket in self.result {
      print(eachTicket.subject)
    }
  } catch {
    print("error"+error.localizedDescription)
  }
}.resume()

但是，当我尝试执行代码时，它说:由于格式不正确，无法读取数据."据我了解，代码中的循环足以获取数组中的值，或者我错了.感谢您的任何帮助.

However, when I tried to execute the code, it says "The data couldn’t be read because it isn’t in the correct format." From what I understand, the loop for in the code is suffice to get the values in the arrays or maybe I'm wrong. Any help is appreciated, thanks.

推荐答案

根对象是字典.您可以将对象解码为[String:Resultat].该词典还包含字典.不涉及数组.

The root object is a dictionary. You can decode the object to [String:Resultat]. The dictionary contains also dictionaries. An array is not involved.

struct Resultat : Decodable {
    let subject: String
    let id : Int
}

---

...
let result = try JSONDecoder().decode([String:Resultat].self, from: data!)
for (key, value) in result {
    print(key, value.subject)
}

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