iOS parse specific jSON - ios

Question

I meet a problem to parse a jSON, I've a jSON like that :
{
"id": 0,
"message": "ok"
}
I tried several things to try to get the value of "id", and "message", but I've always an error..
How can I do to pick the value of "id", and "message" please ?
(I get the result of my JSON in a NSMutableArray)
EDIT :
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSError *jsonParsingError = nil;
NSMutableDictionary *publicTimeline = [NSJSONSerialization JSONObjectWithData:response options:0 error:&jsonParsingError];
NSMutableArray *sortedArray = [NSMutableArray arrayWithArray:publicTimeline.allKeys];
[sortedArray sortUsingSelector:#selector(localizedStandardCompare:)];
return sortedArray;

Answer 1

Your JSON string represents a dictionary. So you have to use NSDictionary instead of NSArray.
EDIT I
// convert dictionary into JSON
NSDictionary *fromDict = #{#"id": #(0), #"message": #"ok"};
NSData *JSONData = [NSJSONSerialization dataWithJSONObject:fromDict options:0 error:nil];
// convert data (like you get from an API request) to dictionary
NSDictionary *toDict = [NSJSONSerialization JSONObjectWithData:JSONData options:0 error:nil];

Answer 2

Try this,
Parse the JSON response to NSDictionary
NSDictionary * responseDictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSString *message = [responseDictionary valueForKey:#"message"];

Answer 3

I think its helpful to you (In this response you get first dictionary and dictionary contains two key.so )
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url]];
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSError *jsonParsingError = nil;
NSDictionary *publicTimeline = [NSJSONSerialization JSONObjectWithData:response options:0 error:&jsonParsingError];
NSString *message = [publicTimeline valueForKey:#"message"];
I Think it useful link for you. json parser