json - Swift:给定的数据不是有效的 JSON

Question

自从昨天更新 xCode 后，我在控制台中收到错误消息，而且我没有从 API 获取数据。我收到此错误:

dataCorrupted(Swift.DecodingError.Context(codingPath: [], debugDescription: "The given data was not valid JSON.", underlyingError: Optional(Error Domain=NSCocoaErrorDomain Code=3840 "字符 0 周围的值无效。 "UserInfo={NSDebugDescription=字符 0 周围的无效值。})))

我不明白的是，我以前从来没有遇到过任何问题，现在我不知从哪里得到了这个错误，而且我也不知道问题是在服务器端还是在我的 swift 代码中......在这里，如果我如何提出请求:

        //    -- 1 -- Create an URL
        if let url = URL(string: urlString){
            //    -- 2 -- Create a URLSession
            let session = URLSession(configuration: .default)

            let task = session.dataTask(with: url) { (data, response, error) in
                if error != nil{
                    print(error!)
                    return
                }
                if let safeData = data {
                    self.parseJSON(EventDatas: safeData)
                }
            }
            task.resume()
        }
    }

    func parseJSON(EventDatas: Data){
        let decoder = JSONDecoder()
        do{
            let decodedData = try decoder.decode(LuxCategoryData.self, from: EventDatas)
            var test: [Int] = []
            for object in decodedData.category {
                let category: CategoryData = CategoryData()
                category.idCategory = object.idCategory
                category.dtTitle = object.dtTitle
                dropDown.optionArray.append(category.dtTitle)
                test.append(Int(category.idCategory)!)
                self.categoryData.append(category)
            }
            dropDown.optionIds = test
        }catch{
            print(error)
        }
    }

这是我用来解析 JSON 的可解码结构:

struct LuxCategoryData : Decodable {
    let category: [Category]
}

struct Category: Decodable {
    let idCategory: String;
    let dtTitle: String;
}

这是我在浏览器中发出请求时我的 JSON 的样子:

{
 category: [
  {
   idCategory: "1",
   dtTitle: "Cinema"
  },
  {
   idCategory: "2",
   dtTitle: "Bar"
  },
  {
   idCategory: "5",
   dtTitle: "Danse" 
  },
  { 
   idCategory: "6",
   dtTitle: "Nightlife"
  },
  {
   idCategory: "10",
   dtTitle: "Music"
  }
 ]
}

Answer 1

您提供的 JSON 键周围没有包含 ""。这就是它给出无效 JSON 错误的原因。

试试下面的 JSON 格式，

{"category":[{"idCategory":"1","dtTitle":"Cinema"},{"idCategory":"2","dtTitle":"Bar"},{"idCategory":"5","dtTitle":"Danse"},{"idCategory":"6","dtTitle":"Nightlife"},{"idCategory":"10","dtTitle":"Music"}]}