使用核心數據為UITableViewController添加行動畫

Question

我正在使用Master Detail設計模式的Core Data iPad應用程序上工作。 我正在嘗試在更新managedObjectContext之后添加一行動畫。 當前，當我添加一個對象時，它僅出現在表格視圖中。 我正在使用Stanford Core Data Table View類。

這是我的添加對象委托的save方法：

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

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

這是我的setupFetchedResultsController方法：

    - (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];

    }

這是performFetch方法。

- (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];
}

有什么方法可以將動畫添加到對象添加中？

Answer 1

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

UITableView也有一個類似的方法insertSections:withRowAnimation: