iPhone Core Data Tutorial Parte 3,2

Prima ⌘ - N. Criar um novo UIViewController com um AddIngredientViewController XIB nomeado. Clique duas vezes em IngredientsRootViewController.h e digite:

class Receitas;

interface SelectFromIngredientsViewController: UITableViewController {

Receitas * receitas;

NSManagedObjectContext * managedObjectContext;

NSFetchedResultsController * fetchedResultsController;

}

property (não-atômicas, conservem) Receitas * receitas;

property (nonatomic, reter) NSManagedObjectContext * managedObjectContext;

property (nonatomic, reter) NSFetchedResultsController * fetchedResultsController;

end

Open IngredientsRootViewController.

m e digite:

#import "IngredientsRootViewController.h"

#import "Ingredient.h"

#import "AddIngredientViewController.h"

#import "CoreDataTutorialPart2AppDelegate.h"

implementation IngredientsRootViewController

synthesize managedObjectContext, fetchedResultsController;

- (void) viewDidLoad {

[super viewDidLoad];

UIBarButtonItem * addButton = [[ ,,,0],UIBarButtonItem alloc] initWithBarButtonSystemItem: alvo UIBarButtonSystemItemAdd: auto ação:selector (addIngredient)];

self.navigationItem.

leftBarButtonItem = addButton;

[liberação addButton];

//Uncomment a seguinte linha para exibir um botão Editar na barra de navegação para este controlador de vista

self.navigationItem.rightBarButtonItem = self.editButtonItem;.

CoreDataTutorialPart2AppDelegate * appDelegate = (CoreDataTutorialPart2AppDelegate *) [ ,,,0],[UIApplication sharedApplication] delegado];

self.managedObjectContext = appDelegate.

managedObjectContext;

NSError * error = nil;

if ([[auto fetchedResultsController] performFetch: & erro ;]) {

NSLog (@ "erro não resolvido% @,% @", erro, [erro userInfo]);

abort ();

}

}

- (void) {addIngredient

AddIngredientViewController * addIngredientView = [[AddIngredientViewController alloc] initWithNibName: @ pacote "AddIngredientViewController": [NSBundle mainBundle]];

< p> Ingrediente * ingrediente = [NSEntityDescription insertNewObjectForEntityForName: @ "ingrediente" inManagedObjectContext: self.

managedObjectContext];

addIngredientView.ingredient = ingrediente;

UINavigationController * NavController = [[UINavigationController Alloc] initWithRootV