iphone-弹出一个view后再推出一个view

有一个在导航推的view，我在button中加了下面代码：

[self.navigationController popViewControllerAnimated:YES];
    FreeStuffViewController * freeStuffVC=[[FreeStuffViewController   alloc]initWithNibName:@"FreeStuffViewController" bundle:nil];
    [self.navigationController pushViewController:freeStuffVC animated:YES];
    [freeStuffVC release];

运行之后，只能弹出一个view，接下来推出的FreeStuffVc没出现，请帮忙解决，谢谢。

    UINavigationController *local = [[UINavigationController alloc]init];
    [local popViewControllerAnimated:NO];
    newView *nr=[[newView alloc]init];
    [self.navigationController pushViewController:nr animated:YES];

FreeStuffViewController * freeStuffVC=[[FreeStuffViewController alloc] initWithNibName:@"FreeStuffViewController" bundle:nil];
    [self.navigationController pushViewController:freeStuffVC animated:YES];
NSMutableArray *viewArray = [[self.navigationController viewControllers] mutableCopy];
[viewArray removeObjectAtIndex:viewArray.count - 2];
self.navigationController.viewControllers = viewArray;

看看这样行不