Tab Bar appearing with no items - iphone

Question

I worked CoreData into my Tab Bar app and the CoreData functions are working (i.e. I can output information from it to the console). The problem is that my tab bar isn't working. When I run my app, it looks like this:
It looks as if the tab bar itself is showing up but there aren't any items and it isn't displaying the table view. My storyboard looks like this:
Here is the code for my AppDelegate:
AppDelegate.h
#import <UIKit/UIKit.h>
#import "JobsViewController.h"
#import "Job.h"
#import "Shift.h"
#interface AppDelegate : UIResponder <UIApplicationDelegate>
#property (strong, nonatomic) UIWindow *window;
#property (readonly, strong, nonatomic) NSManagedObjectContext *managedObjectContext;
#property (readonly, strong, nonatomic) NSManagedObjectModel *managedObjectModel;
#property (readonly, strong, nonatomic) NSPersistentStoreCoordinator *persistentStoreCoordinator;
- (void)saveContext;
- (NSURL *)applicationDocumentsDirectory;
#end
AppDelegate.m
#import "AppDelegate.h"
#implementation AppDelegate
#synthesize window = _window;
#synthesize managedObjectContext = __managedObjectContext;
#synthesize managedObjectModel = __managedObjectModel;
#synthesize persistentStoreCoordinator = __persistentStoreCoordinator;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
NSManagedObjectContext *context = [self managedObjectContext];
Job *job = [NSEntityDescription insertNewObjectForEntityForName:#"Job" inManagedObjectContext:context];
job.employer = #"Calder Centre";
job.jobTitle = #"Addictions Counsellor";
job.regularRate = 25.9f;
job.overtimeRate = 30.5f;
job.deduction1 = 0.1f;
job.deduction2 = 0.2f;
job.deduction3 = 0.3f;
job.deduction4 = 0.4f;
job.deduction1Name = #"CPP";
job.deduction2Name = #"IT";
job.deduction3Name = #"Union Dues";
job.deduction4Name = #"Other";
Shift *shift = [NSEntityDescription insertNewObjectForEntityForName:#"Shift" inManagedObjectContext:context];
shift.startDate = [NSDate date];
shift.endDate = [NSDate date];
NSError *error;
if (![context save:&error]) {
NSLog(#"Whoops, couldn't save: %#", [error localizedDescription]);
}
// Test listing all FailedBankInfos from the store
NSFetchRequest *jobFetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *jobEntity = [NSEntityDescription entityForName:#"Job" inManagedObjectContext:context];
[jobFetchRequest setEntity:jobEntity];
NSArray *fetchedJobs = [context executeFetchRequest:jobFetchRequest error:&error];
for (Job *job in fetchedJobs) {
NSLog(#"Employer: %#", job.employer);
NSLog(#"Title: %#", job.jobTitle);
}
NSFetchRequest *shiftFetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *shiftEntity = [NSEntityDescription entityForName:#"Shift" inManagedObjectContext:context];
[shiftFetchRequest setEntity:shiftEntity];
NSArray *fetchedShifts = [context executeFetchRequest:shiftFetchRequest error:&error];
for (Shift *shift in fetchedShifts) {
NSLog(#"Start Date: %#", shift.startDate);
NSLog(#"End Date: %#", shift.endDate);
}
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
// Override point for customization after application launch.
UITabBarController *tabBarController = [[UITabBarController alloc]init];
self.window.rootViewController = tabBarController;
self.window.backgroundColor = [UIColor whiteColor];
[self.window makeKeyAndVisible];
return YES;
}
Here is the view controller:
JobsViewController.h
#import <UIKit/UIKit.h>
#import "Job.h"
#import "Shift.h"
#interface JobsViewController : UITableViewController
#property (nonatomic, strong) NSManagedObjectContext* managedObjectContext;
#property (nonatomic, strong) NSArray *listOfJobs;
#end
JobsViewController.m
#import "JobsViewController.h"
#interface JobsViewController ()
#end
#implementation JobsViewController
#synthesize managedObjectContext, listOfJobs;
- (void)viewDidLoad
{
[super viewDidLoad];
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
self.navigationItem.rightBarButtonItem = self.editButtonItem;
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init];
NSEntityDescription *entity = [NSEntityDescription
entityForName:#"Job" inManagedObjectContext:managedObjectContext];
[fetchRequest setEntity:entity];
NSError *error;
self.listOfJobs = [managedObjectContext executeFetchRequest:fetchRequest error:&error];
self.title = #"Jobs";
}
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [listOfJobs count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"job";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
// Configure the cell...
Job *job = [listOfJobs objectAtIndex:indexPath.row];
cell.textLabel.text = job.jobTitle;
cell.detailTextLabel.text = job.employer;
return cell;
}

Answer 1

This has nothing to do with core data.
You are using code from an app delegate template for a non-storyboard project, but you are using a storyboard. The code in your didFinishLaunching method is creating a new window and empty tab bar controller, which is overriding anything from your storyboard.
Get rid of everything after self.window =, except return YES;. This is code used in xib-based applications and is not necessary if you have a storyboard.