JSON parse returns NSDicationary with empty values

Question

I'm trying to transform a very simple JSON in to a NSDicationary to then populate my CoreData model with the retrieved data, the problem is after I get my json from the server and try to parse it to a NSDicationary my dictionary just show I have 811 values inside but they all are empry values.

NSDictionary

I have printed my json (NSData) and all the content is there and my error var is null after this point.

This is the piece of code I use to do the parse:

 [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers|NSJSONReadingMutableLeaves error:&error]

And here is an example of my JSON:

[
    {
        "product": "A",
        "name": "B"
    },
    {
        "product": "B",
        "name": "A"
    }
]

If I print the data using the code below, the result is exactly the same I get from my server:

[[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding]

After clicking in the "I" (information) icon I got that:

Execution was interrupted, reason: Attempted to dereference an invalid ObjC Object or send it an unrecognized selector. The process has been returned to the state before expression evaluation.

But can't understand why...

I have already searched for this on stackoverflow and I didn't find any solution to my problem, maybe I'm searching with the wrongs terms.

Your JSON is not valid—you need quotation marks around product and name. — bdesham
– bdesham, Commented Jun 11, 2014 at 15:51
Sorry was my fault, I just copied from Google Chrome, edited the question to show the right JSON — GhostDerfel
– GhostDerfel, Commented Jun 11, 2014 at 15:55
What is the result of printing the object you get from NSJSONSerialization? The debugging popover has not always worked for me. — Javier C
– Javier C, Commented Jun 11, 2014 at 16:07
2014-06-11 17:07:16.895 TestApp[26990:60b] jsonObject=[{"product":"A","name":"B"},{"product":"B","name":"A"}] — GhostDerfel
– GhostDerfel, Commented Jun 11, 2014 at 16:11

bdesham · Accepted Answer · 2014-06-11 15:57:49Z

1

You say you are parsing your JSON into an NSDictionary but the top-level data structure of your JSON is an array. Parse your JSON into an NSArray; each element of this array will be an NSDictionary.

answered Jun 11, 2014 at 15:57

bdesham

16.3k15 gold badges88 silver badges138 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

GhostDerfel Over a year ago

I already tryed that, I just got the same result but with a empty NSArray, but I have only changed my "results" var to type NSArray. I need to change the way I do the parse?

GhostDerfel Over a year ago

Can't understand why but the first time I tested this I got the same error, after testing a bunch of times this was the solution...

Collectives™ on Stack Overflow

JSON parse returns NSDicationary with empty values

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related