How to convert jsonString to json dictionary in swift 3?

Question

I am having an api in which after parsing json the response gets as below mentioned and after that I had removed slashes also but unable to save it into dictionary format can anyone help me how to implement this ?

Here is my code

func productListSortDownloadJsonWithURL() {
        let url = URL(string: sortIndicesURL)!
        var request = URLRequest(url: url as URL)
        request.httpMethod = "GET"
        request.addValue("Basic Z29tZXRvb2FkOm55UWREZ1ZYMWdYU1FkMmhHWEpN", forHTTPHeaderField: "Authorization")
        let task = URLSession.shared.dataTask(with: request) { (data, response, error) in
            if error != nil { print(error!); return }
            do {
                if let jsonObj = try! JSONSerialization.jsonObject(with: data!, options: .allowFragments) as? String {
                    print(jsonObj)
                    self.secondIndices = jsonObj.replacingOccurrences(of:"\"", with: "")
                    DispatchQueue.main.async {

                    }
                }
            } catch {
                print(error)

            }
        }
        task.resume()
    }

here is my json data

"{\"1\":{\"attribute\":\"price_index\",\"sort\":\"desc\",\"sortLabel\":\"Highest price\"},\"0\":{\"attribute\":\"price_index\",\"sort\":\"asc\",\"sortLabel\":\"Lowest price\"},\"2\":{\"attribute\":\"rating_summary\",\"sort\":\"desc\",\"sortLabel\":\"Top Rated\"}}"

Please refer, https://stackoverflow.com/questions/30480672/how-to-convert-a-json-string-to-a-dictionary — nikBhosale, Feb 20 '18 at 04:28
`jsonObj` is not a String, it is your desired dictionary. There is no need to do anything. — rmaddy, Feb 20 '18 at 04:31
by parsing it as string only it got parsed before it got crashed when I tried to get it as dictionary @rmaddy — User, Feb 20 '18 at 04:35
Why do you *remove* the backslashes? They are virtually added to `print` double quotes in a literal string. Actually they don't exist. — vadian, Feb 20 '18 at 05:24
then there is no need of removing backslashes then how to append it to dictionary @vadian ? — User, Feb 20 '18 at 05:31
If you really get a deserialized string you need to call `jsonObject(with` a second time to get a dictionary. — vadian, Feb 20 '18 at 05:33
Just convert the string to `Data` and add a second `jsonObject(with` line — vadian, Feb 20 '18 at 05:49

score 0 · Answer 1 · answered Feb 20 '18 at 04:41

0

swift 3.0

extension Data
{
func dataToJSON() -> Any? {
    do {
        return try JSONSerialization.jsonObject(with: self, options: .mutableContainers)
    } catch let myJSONError {
        print(myJSONError)
    }
    return nil
}
}

Usage

if let dictResponse = data?.dataToJSON() as? NSDictionary {
 print(dictResponse)
}

answered Feb 20 '18 at 04:41

Pratik Prajapati

1,137
1
13
26

it didn't work it shows error – User Feb 20 '18 at 04:58
It's pointless to use `.mutableContainers` in Swift. And do not use `NSDictionary` in Swift. – rmaddy Feb 20 '18 at 04:58
first remove with `jsonString.removingPercentEncoding`, then try to convert in json – Pratik Prajapati Feb 20 '18 at 05:03

nikBhosale · Answer 2 · 2018-02-20T05:51:07.830

-1

Try this,

let yourDictionary = NSKeyedUnarchiver.unarchiveObject(with: data!) as? Dictionary

edited Feb 20 '18 at 05:51

answered Feb 20 '18 at 04:38

nikBhosale

531
1
5
27

after parsing I need to pass the data into this ? – User Feb 20 '18 at 04:43
yes, you already have data, just pass it into this. It should work. – nikBhosale Feb 20 '18 at 04:44
I tried to pass but I got error as shown here https://i.stack.imgur.com/JjaT9.png – User Feb 20 '18 at 04:47
You are doing it wrong, let task = URLSession.shared.dataTask(with: request) { (data, response, error) in if error != nil { print(error!); return } do { let yourDictionary: Dictionary? = NSKeyedUnarchiver.unarchiveObject(with: data) as! [String : Any] print(yourDictionary) DispatchQueue.main.async { } } catch { print(error) } } – nikBhosale Feb 20 '18 at 04:49
then how to implement it ? @nikBhosale – User Feb 20 '18 at 04:50
Don't use 'jsonObj', use 'data' as argument directly. – nikBhosale Feb 20 '18 at 04:52
it again crashed at the line what u said to change https://i.stack.imgur.com/QW0Oc.png – User Feb 20 '18 at 04:59
Comment everything and try only, let yourDictionary = NSKeyedUnarchiver.unarchiveObject(with: data!) as? Dictionary print(yourDictionary) – nikBhosale Feb 20 '18 at 05:04

How to convert jsonString to json dictionary in swift 3?

2 Answers2