Could anyone tell me how to parse and extract just the data node, i.e. CM, Dozen, Foot..., from the JSON response below into an NSMutableArray, so it can be used as data source for UITableView?

{success: true, dataCount: 11, data: [{"unitName":"CM"},{"unitName":"Dozen"},{"unitName":"Foot"},{"unitName":"Gross"},{"unitName":"Inch"},{"unitName":"K"},{"unitName":"KG"},{"unitName":"LB"},{"unitName":"Piece"},{"unitName":"Set"},{"unitName":"Yard"}]}

There is nothing in myExtractedData. Am I doing anything wrong?

Please help.

Are you letting the user add/modify the array in the UITableView, is that why you need it to be mutable?

In any case, here's how you can do it: access the data array from the "wholeResponse" dictionary, then turn that array into a mutable one.

NSArray *data = [wholeResponse valueForKey:@"data"];
NSMutableArray *mutableData = [NSMutableArray arrayWithArray:data];

// Do something with the mutable data.

to get data from the entire NSDictionary - NSArray values = [data objectForKey:@"data"]. This give the NSArray associated with data.

to get CM try this -NSString *CM = [[values objectAtIndex:0] objectForKey:@"unitName"] The same goes for Dozen, Foot. etc.

You can then put this data in UITableView.

UPDATE: Try this. I am assuming you are using this as JSON parser.

NSDictionary *myParsedJson = [myRawJson JSONValue];
NSArray *myExtractedData = [myParsedJson valueForKey:@"data"];
NSLog(@"myExtractedData Count: %@", [myExtractedData count]);