- (void)controller:(NSFetchedResultsController *)controller didChangeObject:(id)anObject
       atIndexPath:(NSIndexPath *)indexPath forChangeType:(NSFetchedResultsChangeType)type
      newIndexPath:(NSIndexPath *)newIndexPath
{
    switch(type) {
        case NSFetchedResultsChangeInsert:
            [_insertions addObject:@(newIndexPath.row)];
            break;
    }
}


- (void)controllerWillChangeContent:(NSFetchedResultsController *)controller {
    _insertions = @[].mutableCopy;
}

- (void)controllerDidChangeContent:(NSFetchedResultsController *)controller {
    NSMutableArray *copy = _insertions.mutableCopy;

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

        NSSortDescriptor *lowestToHighest = [NSSortDescriptor sortDescriptorWithKey:@"self" ascending:YES];
        [copy sortUsingDescriptors:[NSArray arrayWithObject:lowestToHighest]];

        dispatch_sync(dispatch_get_main_queue(), ^{

            for (NSNumber *i in copy) {
                [self p_delayedAddRowAtIndex:[i integerValue]];
            }
            [self.tableView reloadData];
        });
    });
}

- (CGFloat)p_firstRowHeight {
    return [self tableView:[self tableView] heightForRowAtIndexPath:[NSIndexPath indexPathForRow:0
                                                                                       inSection:0]];
}

-(void)p_delayedAddRowAtIndex:(NSInteger)row {

    NSIndexPath *firstVisibleIndexPath = [[self.tableView indexPathsForVisibleRows] firstObject];

    if (firstVisibleIndexPath.row >= row) {

        CGPoint offset = [[self tableView] contentOffset];
        offset.y += [self firstRowHeight];

        if ([self.tableView visibleCells].count > self.tableView.frame.size.height / [self firstRowHeight]) {
            [[self tableView] setContentOffset:offset];
        }
    }
}