how to parse json in app

Question

i have just started developing ios apps. I am writing an ios app, and need to parse json response got from server in iphone app

{
    "response": "login success",
    "response_code": 1
}

Answer 1

use NSJSONSerialization to parse json response

NSDictionary *jsonData = [NSJSONSerialization JSONObjectWithData:urlData options:NSJSONReadingMutableLeaves error:nil];

                NSLog(@"json data is %@",jsonData);

                NSInteger success = [[jsonData objectForKey:@"response_code"] integerValue];
                NSString *response = [jsonData objectForKey:@"response"];

                NSLog(@"success is %d",success);

check the response code here

if(success == 1)
                {
                   // navigate to next or do whatever
                   // [self alertStatus:@"Logged in Successfully." :@"Login Success!"];

                }

Answer 2

You should use this framework: https://github.com/stig/json-framework and SBJsonParser class to parse the JSon script. The below code will help you parse json response:

SBJSON *parser = [[SBJSON alloc] init] ;

NSDictionary *dic = (NSDictionary *)[parser objectWithString:respString error:nil];

This code will convert your response string in the respString variable into an NSDictionary, and now you can extract each object by calling:

NSString* response = [dic objectForKey:@"response"];