Master-Detail Application에서 스토리보드를 사용하여 시작 후 화면을 자체 보기로 변경

GUI에서 작업

코드 변경

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    //UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;
    //MasterViewController *controller = (MasterViewController *)navigationController.topViewController;
    //controller.managedObjectContext = self.managedObjectContext;
    //MasterViewController *controller = (MasterViewController *)navigationController.topViewController;
    return YES;
}

@property (nonatomic, readonly) NSManagedObjectContext * managedObjectContext;
@property (strong, nonatomic) NSFetchedResultsController *fetchedResultsController;

#import "AppDelegate.h"
@implementation MasterViewController

@dynamic managedObjectContext;
@synthesize fetchedResultsController=__fetchedResultsController;
- (NSManagedObjectContext *)managedObjectContext {
    AppDelegate *appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    return appDelegate.managedObjectContext;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    // Set up the edit and add buttons.
    // self.navigationItem.leftBarButtonItem = self.editButtonItem;

    UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(insertNewObject)];
    self.navigationItem.rightBarButtonItem = addButton;
}