Question

I try to invoke this method for one time ever the apps is install and launch for the first time.

My idea is to fill the core data table with my data.

How to auto release this method in viewDidLoad?

- (void)insertNewObject:(id)sender
{

    if ((firstRun!=YES)) {

        NSLog(@"The data was already Added");

    }

    else {

        NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
        NSEntityDescription *entity = [[self.fetchedResultsController fetchRequest] entity];
        NSManagedObject *newManagedObject = [NSEntityDescription insertNewObjectForEntityForName:[entity name] inManagedObjectContext:context];

        [newManagedObject setValue:[[NSString alloc]initWithFormat:@"new"] forKey:@"name"];
        firstRun = NO;

        // Save the context.
        NSError *error = nil;
        if (![context save:&error]) {
            NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
            abort();
        }
    }

}

Answer 1

You can use NSUserDefaults to verify if it’s the first run.

- (void)insertNewObject:(id)sender
{
    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    NSDictionary *userDefaultsDefaults = [NSDictionary dictionaryWithObjectsAndKeys:
                                          [NSNumber numberWithBool:YES], @"firstRun", nil];
    [prefs registerDefaults:userDefaultsDefaults];
    BOOL firstRun = [prefs boolForKey:@"firstRun"];

    if (firstRun==YES) {
        NSManagedObjectContext *context = [self.fetchedResultsController managedObjectContext];
        NSEntityDescription *entity = [[self.fetchedResultsController fetchRequest] entity];
        NSManagedObject *newManagedObject = [NSEntityDescription insertNewObjectForEntityForName:[entity name] inManagedObjectContext:context];

        [newManagedObject setValue:[[NSString alloc]initWithFormat:@"new"] forKey:@"name"];

        // Save the context.
        NSError *error = nil;
        if (![context save:&error]) {
            NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
            abort();
        }
        [prefs setBool:NO forKey:@"firstRun"];
        [prefs synchronize];
    } else {
         NSLog(@"The data was already Added");
    }
}

You can call this method in your viewWillDisappear or viewDidLoad with [self insertNewObject:nil];