小编Chr*_*sJP的帖子

这是toggleAddProject方法的代码,Core Data代码与Apple的CoreDataBooks示例中的代码几乎相同,但是当我单击添加按钮时,应用程序崩溃entityForName: could not locate an NSManagedObjectModel for entity name 'Project'就行了newProjectController.project

-(IBAction)toggleAddProject 
{
    NewProjectViewController *newProjectController = [[[NewProjectViewController alloc] initWithStyle:UITableViewStyleGrouped] autorelease];

    // Create a new managed object context for the new project -- set its persistent store coordinator to the same as that from the fetched results controller's context.
    NSManagedObjectContext *addingContext = [[NSManagedObjectContext alloc] init];
    self.addingManagedObjectContext = addingContext;
    [addingManagedObjectContext setPersistentStoreCoordinator:[[fetchedResultsController managedObjectContext] persistentStoreCoordinator]];
    newProjectController.project = (Project *)[NSEntityDescription insertNewObjectForEntityForName:@"Project" inManagedObjectContext:addingContext];
    [addingContext release];


    UINavigationController *addNewNavigationController = [[UINavigationController alloc] initWithRootViewController:newProjectController];
    [self.navigationController presentModalViewController:addNewNavigationController …