JSON Parsing Error (blank response) - objective-c

Question

Here's my code, when I run it, I get: "2014-10-26 19:02:09.153 App[27372:1281902] Price: (
)".
I was wondering why, no errors are being passed through and it honestly confuses me.
(I'm getting a blank response for "omc_usd_price")
#try
{
NSURL *url = [NSURL URLWithString:#"https://omnicha.in/api?method=getinfo"];
NSData *data=[NSData dataWithContentsOfURL:url];
NSError *error;
NSMutableDictionary *JSONStuff= [NSJSONSerialization JSONObjectWithData:data options: NSJSONReadingMutableContainers error: &error];
NSLog(#"%#",JSONStuff);
NSMutableArray * OMCArray = [[NSMutableArray alloc]init];
NSArray * responseArr = JSONStuff[#"omc_usd_price"];
for(NSDictionary * dict in responseArr)
{
[OMCArray addObject:[dict valueForKey:#"omc_usd_price"]];
}
NSLog(#"Price: %# test", OMCArray); // Here you get the Referance data
}
#catch (NSException *exception) {
NSLog(#"%#", exception);
}
#finally {
}
EDIT:
Tried this, I don't think I did this right either!
NSMutableArray * OMCArray = [[NSMutableArray alloc]init];
NSMutableArray * OMCArray2 = [[NSMutableArray alloc]init];
NSArray * responseArr = JSONStuff[#"response"];
NSArray * responseArr2 = JSONStuff[#"omc_usd_price"];
for(NSDictionary * dict in responseArr)
{
[OMCArray addObject:[dict valueForKey:#"response"]];
for(NSDictionary * dict2 in responseArr2)
{
[OMCArray addObject:[dict2 valueForKey:#"omc_usd_price"]];
}
}
NSLog(#"Price: %# test", OMCArray2); // Here you get the Referance data

Answer 1

Here is the JSONStuff dictionary:
{
"error":false,
"response":{
"block_count":96136,
"difficulty":12.18364177,
"netmhps":234.652099,
"seconds_since_block":694,
"avg_block_time":196.533,
"total_mined_omc":6426691.6,
"omc_btc_price":7.0e-6,
"omc_usd_price":0.0025,
"market_cap":15833.5909
}
}
As you can see, there is no entry in the dictionary named "omc_usd_price". There is a entry by that name in the dictionary name "response", but you didn't ask for that.

Answer 2

If you want to get omc_usd_price, as mentioned on your code, then you need to parse 2 dictionaries.
You must first parse the dictionary with the key response, and this will give you a new dictionary.
Then in this new dictionary you must parse/look for the key omc_usd_price.
Also, you're not getting an array back, but a double or float or even a string.