纵向和横向之间切换

我拍摄了两个视图，一个是纵向和横向，我想要切换旋转视图，我正在使用下面的代码，但它不起作用，我可能知道我哪里出了问题，因为我是iPhone开发的新手。我还没有实现任何东西在 ViewDidLoad 方法中，我也应该在那里实现任何东西吗？

- (BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

    if (interfaceOrientation == UIInterfaceOrientationLandscapeLeft || interfaceOrientation == UIInterfaceOrientationLandscapeRight) {
        self.portrait.hidden = YES;
        self.landscape.hidden = NO;
    } else  {
        self.portrait.hidden = NO;
        self.landscape.hidden =YES;
    }

    return YES; 
}

I have showed To Images in Two Views One in Horizontal and one in Vertical....

在 ViewController.m 中：-

@interface OrientationTutorialViewController : UIViewController 
{

    IBOutlet UIView *portraitView;
    IBOutlet UIView *landscapeView;

}

@property (nonatomic, retain) IBOutlet UIView *portraitView;
@property (nonatomic, retain) IBOutlet UIView *landscapeView;


@end

IN .h :-

@implementation OrientationTutorialViewController

@synthesize portraitView, landscapeView;


- (void)viewDidLoad 
{
    [super viewDidLoad];

    [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationChanged:) name:@"UIDeviceOrientationDidChangeNotification" object:nil];

}

- (void) orientationChanged:(id)object
{  
    UIInterfaceOrientation interfaceOrientation = [[object object] orientation];

    if (interfaceOrientation == UIInterfaceOrientationPortrait || interfaceOrientation == UIInterfaceOrientationPortraitUpsideDown) 
    {
        self.view = self.portraitView;
    } 
    else 
    {
        self.view = self.landscapeView;
    }
}

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



- (void)dealloc 
{
    [super dealloc];
}

@end

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