Parse json NSlog xcode - ios

Question

I have gotten this JSON data back and I would like to parse it into the 3 categories: "guid", "exponent", and "modulus". How would I do that? Thank you for the help in advance!
2015-07-01 11:02:51.972 Acculunk KeyPad[4717:1667358] Response Body:
{"error_code":0,"error_message":"","exponent":"010001","guid":"855fd04f-0016-1805-a3be-84dbef17ffd6","modulus":"C44274FBD65D79B7F9ADF5255A563A5B8B8438D30F8E2CAD16950BE8675827B94F4F8040D4A9563811F405F8E94A20A69DCC0CA590F8731803AB4682497C0DC2520AD2AEB2CC4ED159276335C83B4FB4CB44966448081C625DF88D019118B7448684743EFB6D6704F8F8BD79875ACAEFC541DA3661D0D00BDDF115382A64C5C5","tran_id":"cb2e8149-4961-458a-a6b2-7443bdb01509"}
2015-07-01 11:03:37.175 Acculunk KeyPad[4717:1674710] Terminating since there is no system app.
Here's the code:
NSString *temp2 = [NSString stringWithFormat:#"{\n \"partner_key\": \"%#\",\n \"auth_token\": \"QaU9QcFZ6xE7aiRRBge0wZ4p6E01GEbl\",\n \"payment_account_id\": \"%#\",\n \"card_number\": \"%#\",\n \"card_exp_date\": \"%#\",\n \"amount\": \"%#\",\n \"memo\": \"%#\",\n \"recipient\": {\n \"email\": \"%#\",\n \"mobile_phone\": \"%#\"\n }\n}",[Partner_Key text], [Payment_Account_ID text], [Card_Number text], [Card_Exp_Date text], [Amount text],[Memo text], [Recipient_Email text], [Recipient_Phone_Number text]];
NSLog(temp2);
NSURL *URL = [NSURL URLWithString:#"https://cert.payzur.com/payzurservices.svc/payment/send/initiate"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:[temp2 dataUsingEncoding:NSUTF8StringEncoding]];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request
completionHandler:
^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
// Handle error...
return;
}
if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
NSLog(#"Response HTTP Status code: %ld\n", (long)[(NSHTTPURLResponse *)response statusCode]);
NSLog(#"Response HTTP Headers:\n%#\n", [(NSHTTPURLResponse *)response allHeaderFields]);
}
NSString* body = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"Response Body:\n%#\n", body);
NSData *jsonData = [body dataUsingEncoding:NSUTF8StringEncoding];
NSError *e;
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:body options:nil error:&e];
if (res) {
NSNumber *errorCode = res[#"error_code"];
NSString *errorMessage = res[#"error_message"];
NSString *guid = res[#"guid"];
NSString *exponent = res[#"exponent"];
NSString *modulus = res[#"modulus"];
}
else {
NSLog(#"Error: %#", error);
}
}];
[task resume];

Answer 1

Assuming, this data comes as type NSData, you can do the following:
NSError *myError = nil;
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:apiReturn options:0 error:&myError];
NSNumber *errorCode = res[#"error_code"];
NSString *errorMessage = res[#"error_message"];
NSString *guid = res[#"guid"];
NSString *exponent = res[#"exponent"]; // Maybe also a NSNumber?
NSString *modulus = res[#"modulus"];
The Data will be available in the five variables:
errorCode
errorMessage
guid
exponent
modulus

Answer 2

Use + JSONObjectWithData:options:error: to create a NSDictionary of the JSON.
Then access the elements in the usual manner of accessing dictionary items.
Answer by Christopher Mäuer using the literal syntax:
NSError *error;
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:apiReturn options:0 error:&error];
if (res) {
NSNumber *errorCode = res[#"error_code"];
NSString *errorMessage = res[#"error_message"];
NSString *guid = res[#"guid"];
NSString *exponent = res[#"exponent"]; // Maybe also a NSNumber?
NSString *modulus = res[#"modulus"];
}
else {
NSLog(#"Error: %#", error);
}
Updated for new question code:
Here is sample code, I have re-constructed the data received from the log out put in the question:
NSString *responseBody = #"{\"error_code\":0,\"error_message\":\"\",\"exponent\":\"010001\",\"guid\":\"855fd04f-0016-1805-a3be-84dbef17ffd6\",\"modulus\":\"C44274FBD65D79B7F9ADF5255A563A5B8B8438D30F8E2CAD16950BE8675827B94F4F8040D4A9563811F405F8E94A20A69DCC0CA590F8731803AB4682497C0DC2520AD2AEB2CC4ED159276335C83B4FB4CB44966448081C625DF88D019118B7448684743EFB6D6704F8F8BD79875ACAEFC541DA3661D0D00BDDF115382A64C5C5\",\"tran_id\":\"cb2e8149-4961-458a-a6b2-7443bdb01509\"}";
NSData *data = [responseBody dataUsingEncoding:NSUTF8StringEncoding];
// The above was just to get `data` setup.
// The only function of the following two statements is to print the data as a string.
NSString* body = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"Response Body:\n%#\n", body);
//
// NSData *jsonData = [body dataUsingEncoding:NSUTF8StringEncoding];
NSError *error;
NSDictionary *res = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
NSLog(#"res: \n%#", res);
if (res) {
NSNumber *errorCode = res[#"error_code"];
NSString *errorMessage = res[#"error_message"];
NSString *guid = res[#"guid"];
NSString *exponent = res[#"exponent"];
NSString *modulus = res[#"modulus"];
NSLog(#"errorCode: %#\nerrorMessage: %#\nguid: %#\nexponent: %#\nmodulus: %#", errorCode, errorMessage, guid, exponent, modulus);
}
else {
NSLog(#"Error: %#", error);
}
Output:
Response Body:
{"error_code":0,"error_message":"","exponent":"010001","guid":"855fd04f-0016-1805-a3be-84dbef17ffd6","modulus":"C44274FBD65D79B7F9ADF5255A563A5B8B8438D30F8E2CAD16950BE8675827B94F4F8040D4A9563811F405F8E94A20A69DCC0CA590F8731803AB4682497C0DC2520AD2AEB2CC4ED159276335C83B4FB4CB44966448081C625DF88D019118B7448684743EFB6D6704F8F8BD79875ACAEFC541DA3661D0D00BDDF115382A64C5C5","tran_id":"cb2e8149-4961-458a-a6b2-7443bdb01509"}
res:
{
"error_code" = 0;
"error_message" = "";
exponent = 010001;
guid = "855fd04f-0016-1805-a3be-84dbef17ffd6";
modulus = C44274FBD65D79B7F9ADF5255A563A5B8B8438D30F8E2CAD16950BE8675827B94F4F8040D4A9563811F405F8E94A20A69DCC0CA590F8731803AB4682497C0DC2520AD2AEB2CC4ED159276335C83B4FB4CB44966448081C625DF88D019118B7448684743EFB6D6704F8F8BD79875ACAEFC541DA3661D0D00BDDF115382A64C5C5;
"tran_id" = "cb2e8149-4961-458a-a6b2-7443bdb01509";
}
errorCode: 0
errorMessage:
guid: 855fd04f-0016-1805-a3be-84dbef17ffd6
exponent: 010001
modulus: C44274FBD65D79B7F9ADF5255A563A5B8B8438D30F8E2CAD16950BE8675827B94F4F8040D4A9563811F405F8E94A20A69DCC0CA590F8731803AB4682497C0DC2520AD2AEB2CC4ED159276335C83B4FB4CB44966448081C625DF88D019118B7448684743EFB6D6704F8F8BD79875ACAEFC541DA3661D0D00BDDF115382A64C5C5

Answer 3

I suggest you replacing the following two lines:
NSString* body = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"Response Body:\n%#\n", body);
With the two code lines I provide:
NSError *error;
NSDictionary* responseData = [NSJSONSerialization JSONObjectWithData:data options:0 error:&error];
or with the following:
NSDictionary *responseData = [[NSDictionary alloc] initWithDictionary:(NSDictionary *)data];
So now you have a NSDictionary, which is responseData, so now we can decode your JSON response as follows (I will put the whole code as follows):
NSString* body = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSDictionary *responseData = [[NSDictionary alloc] initWithDictionary:(NSDictionary *)data];
NSString *guid = [responseData valueForKey:#"guid"];
NSString *exponent = [responseData valueForKey:#"exponent"];
NSString *modulus = [responseData valueForKey:#"modulus"];
NSLog(#"Decoded Response :\n guide : %#,\n exponent : %#,\n modulus : %#", guid, exponent, modulus);
So your whole code which you have pasted above in your Question will look like following:
NSString *temp2 = [NSString stringWithFormat:#"{\n \"partner_key\": \"%#\",\n \"auth_token\": \"QaU9QcFZ6xE7aiRRBge0wZ4p6E01GEbl\",\n \"payment_account_id\": \"%#\",\n \"card_number\": \"%#\",\n \"card_exp_date\": \"%#\",\n \"amount\": \"%#\",\n \"memo\": \"%#\",\n \"recipient\": {\n \"email\": \"%#\",\n \"mobile_phone\": \"%#\"\n }\n}",[Partner_Key text], [Payment_Account_ID text], [Card_Number text], [Card_Exp_Date text], [Amount text],[Memo text], [Recipient_Email text], [Recipient_Phone_Number text]];
NSLog(temp2);
NSURL *URL = [NSURL URLWithString:#"https://cert.payzur.com/payzurservices.svc/payment/send/initiate"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:[temp2 dataUsingEncoding:NSUTF8StringEncoding]];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:request
completionHandler:
^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
// Handle error...
return;
}
if ([response isKindOfClass:[NSHTTPURLResponse class]]) {
NSLog(#"Response HTTP Status code: %ld\n", (long)[(NSHTTPURLResponse *)response statusCode]);
NSLog(#"Response HTTP Headers:\n%#\n", [(NSHTTPURLResponse *)response allHeaderFields]);
}
NSDictionary *responseData = [[NSDictionary alloc] initWithDictionary:(NSDictionary *)data];
NSString *guid = [responseData valueForKey:#"guid"];
NSString *exponent = [responseData valueForKey:#"exponent"];
NSString *modulus = [responseData valueForKey:#"modulus"];
NSLog(#"Decoded Response :\n guide : %#,\n exponent : %#,\n modulus : %#", guid, exponent, modulus);
}];
[task resume];

Answer 4

Well, you didn't say anything about how you got the data back, like if you already have it in a NSString or still in NSData, so I'm going to assume you have it in NSData.
NSData *json <- somehow I magically got jSON data into this
NSError *error = nil;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:json options:kNilOptions error:&error];
NSString guid = [NSString stringWithString:jsonDict[#"guid"];
NSString exponent = [NSString stringWithString:jsonDict[#"exponent"];
NSString modulus = [NSString stringWithString:jsonDict[#"modulus"];