CODEWITHSUNDEEP
iosjsonswiftnsdictionary
Black Magic
Black Magic

Reputation: 2766

Swift: Parsing JSON, NSDictionary of NSDictionaries

I am trying to parse a JSON file with some tags and sub tags. I am doing this by creating a NSDictionary. From this I create a NSDictionary from a certain tag. This NSDictionary contains the properties I want to parse. So I am trying to loop over the NSDictionary, but it is not working. I tried many variants of this, but it keeps giving me compile time errors.

var jsonResult: NSDictionary = NSJSONSerialization.JSONObjectWithData(JSONData, options: NSJSONReadingOptions.MutableContainers, error: nil) as NSDictionary

var devices:NSDictionary = jsonResult.objectForKey("devices") as NSDictionary

for device:NSDictionary in devices{

    device.objectForKey("id")
    //etc
    //etc
}

I get the following error:

'(key: AnyObject, value: AnyObject)' is not convertible to 'NSDictionary'

on the for each loop line. I've also tried casting it to NSDictionary after, but then I get the same error.

For clarification, this is an example of what my json file looks like:

{  
   "global":{  
      //etc
   },
   "user":{  
    //etc
   },
   "devices":[  
      {  
         "id":16108,
         //etc
      },
      {
          “id”:12310,
          //etc
      },
        //etc
},

etc obviously means theres more data, this is just a basic outline. I am trying to read the properties of the devices

Upvotes: 4

Views: 6292

Answers (2)

iOSfleer
iOSfleer

Reputation: 418

Works for me:

        var error: NSError?
        var jsonResult = NSJSONSerialization.JSONObjectWithData(jsonData, options: NSJSONReadingOptions.MutableContainers, error: &error) as NSDictionary

        var devices = jsonResult.objectForKey("devices") as NSArray?
        if devices != nil {
            for device in devices! {
                var deviceId = device.objectForKey("id") as NSNumber
                println("deviceId: \(deviceId)")
            }
        }

Upvotes: -1

tilo
tilo

Reputation: 14169

The issue here is that objectForKey("devices") returns an NSArray and not a NSDictionary

Upvotes: 3

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