Acabei de encontrar esta nova API no iOS8. No entanto, não consigo encontrar nenhuma solução sobre se é possível usar imagens em vez de texto e permitir deslizar para a esquerda e direita? Isso é possível? A única implementação que encontrei é esta:

- (NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath {

    UITableViewRowAction *moreAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleNormal title:@"Button1" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath){
        // maybe show an action sheet with more options
        [self.tableView setEditing:NO];
    }];
    moreAction.backgroundColor = [UIColor blueColor];

    UITableViewRowAction *moreAction2 = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleNormal title:@"Button2" handler:^(UITableViewRowAction *action, NSIndexPath *indexPath){
        [self.tableView setEditing:NO];
    }];
    moreAction2.backgroundColor = [UIColor blueColor];

    UITableViewRowAction *deleteAction = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleDestructive title:@"Delete"  handler:^(UITableViewRowAction *action, NSIndexPath *indexPath){
        [self.tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
    }];

    return @[deleteAction, moreAction, moreAction2];
}