僅在Tabbar-Application（橫向縱向）中的一個選項卡上更改視圖？

如何在旋轉iphone（更換筆尖）時更改視圖。但它應該只發生在一個單一的標籤！我試了一下：僅在Tabbar-Application（橫向縱向）中的一個選項卡上更改視圖？

- (void)viewDidLoad { 
LandscapeViewController *viewController = [[LandscapeViewController alloc] 
      initWithNibName:@"LandscapeView" bundle:nil]; 
self.landscapeViewController = viewController; 
[viewController release]; 

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

- (void)orientationChanged:(NSNotification *)notification 
{ 
    [self performSelector:@selector(updateLandscapeView) withObject:nil afterDelay:0]; 
} 

- (void)updateLandscapeView 
{ 
    UIDeviceOrientation deviceOrientation = [UIDevice currentDevice].orientation; 
    if (UIDeviceOrientationIsLandscape(deviceOrientation) && !isShowingLandscapeView) 
{ 
     [self presentModalViewController:self.landscapeViewController animated:YES]; 
     isShowingLandscapeView = YES; 
    } 
else if (deviceOrientation == UIDeviceOrientationPortrait && isShowingLandscapeView) 
{ 
     [self dismissModalViewControllerAnimated:YES]; 
     isShowingLandscapeView = NO; 
    }  
}

但隨後的景觀，景觀出現在所有選項卡。（當這個代碼加載一次）。有什麼想法？

來源

2010-02-08 x2on

坦克爲您的意見！我發現了一個解決方法：

//Remove Observer if not in Landscape 
- (void)viewDidDisappear:(BOOL)animated { 
    if (isShowingLandscapeView == NO) { 
     [[NSNotificationCenter defaultCenter] removeObserver:self name:UIDeviceOrientationDidChangeNotification object:nil]; 
    } 
} 

//Add Observer if not in Landscape 
- (void)viewDidAppear:(BOOL)animated { 
    if (isShowingLandscapeView == NO) { 
     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationChanged:) name:UIDeviceOrientationDidChangeNotification object:nil]; 
    } 
}

來源

2010-02-12 11:09:53 x2on