JSON problem

#import "jobListViewController.h"


@interface jobListViewController ()

@end

#define getDataURL @"http://localhost/Rany/json.php"

@implementation jobListViewController
@synthesize json, jobsArray, myTableView;


- (void)viewDidLoad
{
    self.title = @"Rany";
    [[UINavigationBar appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor whiteColor]}];
    self.navigationController.navigationBar.tintColor = [UIColor whiteColor];
    [super viewDidLoad];


}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return jobsArray.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *cellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];

    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
    }

    //cell.textLabel.text = [NSString stringWithFormat:@"cell %d", indexPath.row];

    Jobs * currectJob = [jobsArray objectAtIndex:indexPath.row];

    cell.textLabel.text = currectJob.jobName;

    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{


}

- (void) retrieveData
{
    NSURL * url = [NSURL URLWithString:getDataURL];
    NSData * data = [NSData dataWithContentsOfURL:url];

    json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];

    jobsArray = [[NSMutableArray alloc]init];

        for (int i = 0; i < json.count; i++)
        {
            NSString * jID = [[json objectAtIndex:i] objectForKey:@"id"];
            NSString * jName = [[json objectAtIndex:i] objectForKey:@"jobName"];
            NSString * jTime = [[json objectAtIndex:i] objectForKey:@"jobTime"];
            NSString * jDesc = [[json objectAtIndex:i] objectForKey:@"jobDesc"];
            NSString * jNeed = [[json objectAtIndex:i] objectForKey:@"jobNeed"];

            Jobs * myJob = [[Jobs alloc] initWithjobID: (NSString *) jID andjobName: (NSString *) jName andjobTime: (NSString *) jTime andjobDesc: (NSString *) jDesc andjobNeed: (NSString *) jNeed];

            [jobsArray addObject:myJob];


        }


}

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    [self.tableView reloadData];
}