使用核心数据为UITableViewController添加行动画

Question

I am working on a Core Data iPad app that uses the Master Detail design pattern. I am trying to animate adding a row after updating the managedObjectContext . Currently when I add an object it just appears in the table view. I am using the Stanford Core Data Table View class.

This is my add object delegate's save method:

 - (void)addObjectSaveButtonTapped:(iPadAddObjectViewController *)controller {

    [self dismissModalViewControllerAnimated:YES];
    [self setupFetchedResultsController];
}

This is my setupFetchedResultsController method:

    - (void)setupFetchedResultsController {


        NSString *entityName = @"Object";

        NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:entityName];

        request.sortDescriptors = [NSArray arrayWithObject:[NSSortDescriptor sortDescriptorWithKey:@"objectName" ascending:YES selector:@selector(localizedCaseInsensitiveCompare:)]];

        self.fetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:request managedObjectContext:self.managedObjectContext sectionNameKeyPath:nil cacheName:nil];


        [self performFetch];

    }

This is performFetch method.

- (void)performFetch
{
    _debug = YES;

    if (self.fetchedResultsController) {
        if (self.fetchedResultsController.fetchRequest.predicate) {
            if (self.debug) NSLog(@"[%@ %@] fetching %@ with predicate: %@", NSStringFromClass([self class]), NSStringFromSelector(_cmd), self.fetchedResultsController.fetchRequest.entityName, self.fetchedResultsController.fetchRequest.predicate);
        } else {
            if (self.debug) NSLog(@"[%@ %@] fetching all %@ (i.e., no predicate)", NSStringFromClass([self class]), NSStringFromSelector(_cmd), self.fetchedResultsController.fetchRequest.entityName);
        }
        NSError *error;
        [self.fetchedResultsController performFetch:&error];
        if (error) NSLog(@"[%@ %@] %@ (%@)", NSStringFromClass([self class]), NSStringFromSelector(_cmd), [error localizedDescription], [error localizedFailureReason]);
    } else {
        if (self.debug) NSLog(@"[%@ %@] no NSFetchedResultsController (yet?)", NSStringFromClass([self class]), NSStringFromSelector(_cmd));
    }
    [self.tableView reloadData];
}

Is there any way to add animations to object additions?

Answer 1

[self.tableView beginUpdates];
[self.tableView insertRowsAtIndexPaths:[NSArray arrayWithObject:yourIndexPath] withRowAnimation:UITableViewRowAnimationFade];
[self.tableView endUpdates];

UITableView also has a similar method, insertSections:withRowAnimation: