How to get data from JSON with different keys?

Question

The JSON looks like this:

{
"00AK": {
    "icao": "00AK",
    "iata": "",
    "name": "Lowell Field",
    "city": "Anchor Point",
    "country": "US",
    "elevation": 450,
    "lat": 59.94919968,
    "lon": -151.695999146,
    "tz": "America\/Anchorage"
},
"00AL": {
    "icao": "00AL",
    "iata": "",
    "name": "Epps Airpark",
    "city": "Harvest",
    "country": "US",
    "elevation": 820,
    "lat": 34.8647994995,
    "lon": -86.7703018188,
    "tz": "America\/Chicago"
},
"00AZ": {
    "icao": "00AZ",
    "iata": "",
    "name": "Cordes Airport",
    "city": "Cordes",
    "country": "US",
    "elevation": 3810,
    "lat": 34.3055992126,
    "lon": -112.1650009155,
    "tz": "America\/Phoenix"
}
}

As you can see the keys varies "00AK", "00AL", "00AZ", and so on. How do I parse this format of JSON?

what do the keys matter to parsing? Just parse the json like any other, id your actual question how to retrieve the data from the parsed json? — luk2302
– luk2302, Commented Sep 22, 2017 at 7:43
you can google it, search keyword jsonObject. there is tons of sample out there. Good luck! — wes. i
– wes. i, Commented Sep 22, 2017 at 8:16

Malik · Accepted Answer · 2017-09-22 07:54:32Z

1

let jsonData = //JSON DATA HERE
do {
    let dict = try NSJSONSerialization.JSONObjectWithData(jsonData, options: []) as! NSDictionary
    for (key, value) in dict {
        let subDict = value as! NSDictionary
        //Then you can access the values from subDict
    } catch {
        //ERROR HANDLING    
    }

answered Sep 22, 2017 at 7:54

Malik

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2 Comments

Eric Aya Over a year ago

You should not use NSDictionary in Swift, better use a Swift dictionary like [String: Any]. Also you should not force cast but instead handle the possible casting failure.

Malik Over a year ago

Agreed. I was just giving the basic gist of the process.

Karan · Accepted Answer · 2017-09-22 08:27:17Z

So here it is I declare one structure as following

struct Model {
var iaco: String?
var iata: String?
var name: String?
var city: String?
var country: String?
var elevation: Int?
var lat: Double?
var lon: Double?
var tz: String? }

Then declare on array to hold the response result

var listOfModels = Array<Model>()

Then take a list of keys from response Dictionary and iterate over it to get result and store it in array

  handleResponse { (response) in
        for key in response.keys {
            let dict = response[key] as? [String:Any]
            var model = Model()
            model.iaco = dict?["icao"] as? String
            model.iata = dict?["iata"] as? String
            model.name = dict?["name"] as? String
            model.city = dict?["city"] as? String
            model.country = dict?["country"] as? String
            model.elevation = dict?["elevation"] as? Int
            model.lat = dict?["lat"] as? Double
            model.lon = dict?["lon"] as? Double
            model.tz = dict?["tz"] as? String
            listOfModels.append(model)
        }
    }

response.keys is used to get list of keys from dictionary.

Rishi · Accepted Answer · 2017-09-22 09:53:57Z

0

You could try the below snippet:

func parseData() {
    let jsonData = Data() /// your actual response data goes here...
    do {
        let dict = try JSONSerialization.jsonObject(with: jsonData, options: .allowFragments)
        guard let swiftDict = dict as? [String : Any] else {
            print("Not a valid response")
            return
        }

        for (key, value) in swiftDict {
            guard let valueDict = value as? [String: Any] else {
                /// handle improper response here
                return
            }

            /// Got the actual dictionary in 'valueDict'...
        }
    }
    catch {
            /// handle parsing error here
    }

}

answered Sep 22, 2017 at 9:53

Rishi

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