SBJson framework is supported by iOS.  It is a JSON parser and generator for Objective-C. SBJson provides flexible APIs and additional control that makes JSON handling easier.

JSOn

JSON syntax is a subset of the JavaScript object notation syntax:

Data is in name/value pairs

Data is separated by commas

Curly braces hold objects

Square brackets hold arrays

The file type for JSON files is ".json"

The MIME type for JSON text is "application/json"