Ios UiNavigationController自动旋转在设备上不工作？

为什么UINavigationController自动旋转在设备上不工作？如何为UinavigationController设置自动旋转属性

    **BusinessCardAppDelegate.m**

    - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
    { 
           [self.window makeKeyAndVisible];  
        RootView *rView=[[RootView alloc]initWithNibName:@"RootView" bundle:nil];
        self.naviGationController =[[[UINavigationController alloc]initWithRootViewController:rView]autorelease];

        [self.window addSubview:naviGationController.view];
        return YES;
    }

    **RootView.m**

    - (void)viewDidLoad
    {
        [super viewDidLoad];
        self.title =@"BusinessCard";  
        [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationFunction:) name:UIDeviceOrientationDidChangeNotification object:nil];

    }

    -(void)orientationFunction:(NSNotification*)notification
    {
        UIInterfaceOrientation orientation = [[UIDevice currentDevice] orientation];
         switch (orientation)
        {
            case UIDeviceOrientationPortrait:
                /* AlertView Show*/
                break;

            case UIDeviceOrientationPortraitUpsideDown:
               /* AlertView Show*/
                break;
            case UIDeviceOrientationLandscapeLeft:
               /* AlertView Show*/
                break;
            case UIDeviceOrientationLandscapeRight:
               /* AlertView Show*/
                break;
            default:
                break;
        }

  }

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return YES;
}

为什么这不能在设备上运行，但在模拟器中运行良好？我不明白为什么这不起作用？

---

提前感谢。

[[UIDevice currentDevice]方向]

返回UIDeviceOrientation，而不是UIInterfaceOrientation

如果要获取当前界面方向，可以使用以下命令：

UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];

或

UIInterfaceOrientation orientation = self.interfaceOrientation; // into UIViewController