fetching data from data core ios

Question

I'm working on ios application that when clicking add button it takes me to another view controller to fill my information and save them in core data how can i fetch this data and post it in Tableview any help ?

Answer 1

To save the data (in your view controller where you get the data from)

in your .m file add

- (NSManagedObjectContext *)managedObjectContext
{
    NSManagedObjectContext *context = nil;
    id delegate = [[UIApplication sharedApplication] delegate];
    if ([delegate performSelector:@selector(managedObjectContext)]) {
        context = [delegate managedObjectContext];
    }
    return context;
}

and in your save action add

- (IBAction)savePressed:(id)sender
{
    NSManagedObjectContext *context = [self managedObjectContext];

        NSManagedObject *newData = [NSEntityDescription insertNewObjectForEntityForName:@"StoredData" inManagedObjectContext:context];

        [newData setValue:textField.text forKey:@"dataattribute"];

    NSError *error = nil;

    if (![context save:&error]) {
        NSLog(@"Save Failed! %@ %@", error, [error localizedDescription]);
    }

}

in your table view controller

- (NSManagedObjectContext *)managedObjectContext
{
    NSManagedObjectContext *context = nil;
    id delegate = [[UIApplication sharedApplication] delegate];
    if ([delegate performSelector:@selector(managedObjectContext)]) {
        context = [delegate managedObjectContext];
    }
    return context;
}

in your view did appear

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];

    NSManagedObjectContext *moc = [self managedObjectContext];
    NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] initWithEntityName:@"entityName"];
    arrayData = [[moc  executeFetchRequest:fetchRequest error:nil] mutableCopy];


    [self.tableView reloadData];
}

And in your cellForRowAtIndexPath

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{

    static NSString *cellIdentifier = @"Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier forIndexPath:indexPath];

    // Configure the cell...
    NSManagedObject *data = [arrayData objectAtIndex:indexPath.row];

    [cell.textLabel setText:[NSString stringWithFormat:@"%@", [data valueForKey:@"dataattribute"]]];

    return cell;
}