CODEWITHSUNDEEP
jsonswift
Wilson Silva
Wilson Silva

Reputation: 1445

Swift: The given data was not valid JSON

Since yesterday when I updated xCode I'm receiving error in the console and I'm not getting my data from the API. I'm getting this error:

dataCorrupted(Swift.DecodingError.Context(codingPath: [], debugDescription: "The given data was not valid JSON.", underlyingError: Optional(Error Domain=NSCocoaErrorDomain Code=3840 "Invalid value around character 0." UserInfo={NSDebugDescription=Invalid value around character 0.})))

What I don't understand is that I never had any issues before and now I get this error out of nowhere, and I also don't know if the problem is server sided or in my swift code... Here if how I make the request:

        //    -- 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)
        }
    }

Here is the decodable struct I use to parse the JSON:

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

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

This is how my JSON look like when I make a request in the browser:

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

Upvotes: 3

Views: 11958

Answers (2)

PGDev
PGDev

Reputation: 24341

The JSON you provided doesn't contain " " around the keys. That's why it is giving invalid JSON error.

Try with the below JSON format, 

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

Upvotes: 4

MKodes
MKodes

Reputation: 81

Error: Parse error on line 1: { category: [{ idCa --^ Expecting 'STRING', '}', got 'undefined'

https://jsonlint.com/

Upvotes: 2

Related Questions