NSJSONSerialization results in EXC_BAD_ACCESS

Question

Currently I am writing an app (Target iOS 6, ARC enabled) that uses JSON for data transmission and Core Data for persistent storage. The JSON data is generated out of a MySQ

Answer 1

I know this question has been answered but I think some beginners may have the same issue as me and be brought to this question.

The EXC_BAD_ACCESS message was caused by malformed JSON. As I had accidentally used the same name for an Object which causes issues when converting the JSON into a dictionary.

Annoyingly it didn't bring up a formatting error. Here is an example of the JSON that caused the issue:

"levels" : {
    "level1": {
        ....
    },
    "level1": {
        ... << All objects should have different names. This should be called level2.
    },
    "level3": {
        ...
    }

To fix the issue I had to ensure that all objects of the same level had different names.