Convert Json string to Json object in Swift 4

Question

I try to convert JSON string to a JSON object but after JSONSerialization the output is nil in JSON.

Response String:

[{\"form_id\":3465,\"canonical_name\":\"df_SAWERQ\",\"form_name\":\"Activity 4 with Images\",\"form_desc\":null}] 

I try to convert this string with my code below:

let jsonString = response.result.value let data: Data? = jsonString?.data(using: .utf8) let json = (try? JSONSerialization.jsonObject(with: data, options: [])) as? [String:AnyObject]  print(json ?? "Empty Data") 

Answer 1

The problem is that you thought your jsonString is a dictionary. It's not.

It's an array of dictionaries. In raw json strings, arrays begin with [ and dictionaries begin with {.

---

I used your json string with below code :

let string = "[{\"form_id\":3465,\"canonical_name\":\"df_SAWERQ\",\"form_name\":\"Activity 4 with Images\",\"form_desc\":null}]" let data = string.data(using: .utf8)! do {     if let jsonArray = try JSONSerialization.jsonObject(with: data, options : .allowFragments) as? [Dictionary<String,Any>]     {        print(jsonArray) // use the json here          } else {         print("bad json")     } } catch let error as NSError {     print(error) } 

and I am getting the output :

[["form_desc": <null>, "form_name": Activity 4 with Images, "canonical_name": df_SAWERQ, "form_id": 3465]]