我用navigationController从一个view跳到另外一个view

navigationController代码：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    _detailController = [[WBDetailContentController alloc]init];
     [self.navigationController pushViewController:_detailController animated:YES];
    
    [_detailController release];
}

跳转之后的viewDidLoad函数代码：

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.title = @"test";

    UIView *v = [[[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]autorelease];
//    UIView *v2 = [[[UIView alloc]initWithFrame:CGRectMake(1, 1, 10, 10)]autorelease];
    
    self.view = v;
    self.view.autoresizesSubviews = YES;
    [v release];
    
    _buttonForword = [[UIButton alloc]initWithFrame:CGRectMake(40, 150, 20, 10)];
    _buttonComment = [[UIButton alloc]initWithFrame:CGRectMake(70, 150, 20, 10)];
    _buttonMore = [[UIButton alloc]initWithFrame:CGRectMake(100, 150, 20, 10)];
    
    _buttonMore.titleLabel.text = @"More";
    _buttonComment.titleLabel.text = @"Comment";
    _buttonForword.titleLabel.text = @"Forword";
    
    [self.navigationController.view addSubview:_buttonForword];
    
    [self.view addSubview:_buttonComment];
    [self.view addSubview:_buttonForword];
    [self.view addSubview:_buttonMore];
    
    [_buttonForword release];
    [_buttonComment release];
    [_buttonMore release];
}

跳转之后没一个按钮出现。求解！

谢谢！