iPhone导航控制器移除堆栈

找到解决方案。

UINavigationController *navController = self.navigationController;
                MyEditViewController *mevc = [[MYEditViewController alloc] initWithGizmo: gizmo];

                NSMutableArray *controllers = [[self.navigationController.viewControllers mutableCopy] autorelease];
                [controllers removeLastObject];
                navController.viewControllers = controllers;
                [navController pushViewController:objRateAndReview animated: YES];