Why format is strange when JSON is parsed in Swift3? - ios

Question

I have a struggle in parsing JSON data using Oxford Dictionary API. I can retrieve JSON data and at this point, there is no problem. But the format is a bit strange. In the example of JSON data by OXford Document, it looks like;
"results": [
{
"id": "string",
"language": "string",
"lexicalEntries": [
{
"entries": [
{..........
Unlike the example above, the array in my JSON is not surrouned by [], but ()
Why is this happening??
Updated
I used Alamofire to produce it. The code is;
func getJSONData() {
let appId = ""
let appKey = ""
let language = "en"
let word = "play"
let word_id = word.lowercased()
let url = URL(string: "https://od-api.oxforddictionaries.com/api/v1/entries/\(language)/\(word_id)")!
var request = URLRequest(url: url)
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.addValue(appId, forHTTPHeaderField: "app_id")
request.addValue(appKey, forHTTPHeaderField: "app_key")
Alamofire.request(request).responseJSON { response in
print("Request \(response.request)") // original URL request
print("Response \(response.response)") // HTTP URL response
print("Data \(response.data)") // server data
print("Result \(response.result)") // result of response serialization
if let JSON = response.result.value {
print("JSON: \(JSON)")
}
}
}
I followed all code in Oxford Dictionary Document, but the printed out JSON was far from the JSON in the document. So I tried to use Alamofire in the hope for it to work correctly, but the result was the same. https://developer.oxforddictionaries.com/documentation
Update2
Okay, I understood why this was an error. To people who might have the same problem, I post the answer for the problem I had.
enum JSONError: String, Error {
case NoData = "ERROR: no data"
case ConversionFailed = "ERROR: conversion from JSON failed"
}
func jsonParser() {
let appId = ""
let appKey = ""
let language = "en"
let word = "Ace"
let word_id = word.lowercased() //word id is case sensitive and lowercase is required
let url = URL(string: "https://od-api.oxforddictionaries.com:443/api/v1/entries/\(language)/\(word_id)")!
var request = URLRequest(url: url)
request.addValue("application/json", forHTTPHeaderField: "Accept")
request.addValue(appId, forHTTPHeaderField: "app_id")
request.addValue(appKey, forHTTPHeaderField: "app_key")
URLSession.shared.dataTask(with: request) { (data, response, error) in
do {
guard let data = data else {
throw JSONError.NoData
}
guard let json = try JSONSerialization.jsonObject(with: data, options: .allowFragments) as? NSDictionary else {
throw JSONError.ConversionFailed
}
if let stringJSON = String(data: data, encoding: String.Encoding.utf8) {
print(stringJSON)
}
print(json)
} catch let error as JSONError {
print(error.rawValue)
} catch let error as NSError {
print(error.debugDescription)
}
}.resume()
}
Strange printed JSON format This post helped me. This bugged me for a while. Thank you very much #EricAya