Parseando JSON desde un API con Objective-C

gistfile1.m

#import "ViewController.h"
#import "JSONKit.h"

@interface ViewController ()

@property (nonatomic, retain) NSMutableData *response;

@end

@implementation ViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.response = [NSMutableData data];
    
    NSURL *url = [NSURL URLWithString:@"http://www.emplea.do/jobs.json"];
    
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    
    [[NSURLConnection alloc] initWithRequest:request delegate:self];
}

-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
    [self.response setLength:0];
}

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
    [self.response appendData:data];
}

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error{
    UIAlertView *a = [[UIAlertView alloc] initWithTitle:@"DevelopersDO" message:@"Houston, tenemos un problema" delegate:nil cancelButtonTitle:@"Ok" otherButtonTitles:nil, nil];
    [a release];
}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
    //Aquí se parsea el JSON
    JSONDecoder *jsonDecoder = [[JSONDecoder alloc] init];
    NSError *err;
    
    NSDictionary *results = [jsonDecoder objectWithData:self.response error:&err];
    
    if (err) {
        NSLog(@"%@", [err description]);
    }else{
        NSLog(@"%@",[results description]);
    }
}

@end