iOS 5.1 UISplitviewcontroller不允许来自RootViewController的presentModalViewController(iOS 5.1 UISplitviewcontroller not allow presentModalViewController from RootViewController)

 我用来使用以下代码从splitviewcontroller的RootViewcontroller中显示一个viewcontroller。 在iOS 5.1纵向模式下它不会显示任何内容。 当横向显示Rootviewcontroller内的控制器时。 它适用于iOS 5.0。 
 
-(void)displayFileInReader:(NSURL *)fileURL    {

    SPDocumentReader *objiPadDocumentReader = [[SPDocumentReader alloc] init];
    objiPadDocumentReader.readerType = ReaderTypeLocalCachedDocument;
    objiPadDocumentReader.url = fileURL;
    UINavigationController *objNavigationController = [[UINavigationController alloc] initWithRootViewController:objiPadDocumentReader];
    objNavigationController.navigationBar.barStyle = UIBarStyleBlack;

    [self presentModalViewController:objNavigationController animated:YES];

    [objNavigationController release];
    objNavigationController = nil;

    [objiPadDocumentReader release];
    objiPadDocumentReader = nil;
}
 
 我使用self.splitviewcontroller并使用detailviewcontroller实例而不是self。 
 
 但是在这种情况下，当我们点击o detailview控制器来解除/删除rootviewcontroller它会导致崩溃时说“没有窗口的视图”。 
 
 有时在iOS 5.1中，RootView显示方向错误。 
 
 提前致谢 

I use to show a viewcontroller from RootViewcontroller of a splitviewcontroller using the following code. It will not shown any thing in iOS 5.1 portrait mode. when landscape it shows the controller inside the Rootviewcontroller. Its works fine upto iOS 5.0.
 
-(void)displayFileInReader:(NSURL *)fileURL    {

    SPDocumentReader *objiPadDocumentReader = [[SPDocumentReader alloc] init];
    objiPadDocumentReader.readerType = ReaderTypeLocalCachedDocument;
    objiPadDocumentReader.url = fileURL;
    UINavigationController *objNavigationController = [[UINavigationController alloc] initWithRootViewController:objiPadDocumentReader];
    objNavigationController.navigationBar.barStyle = UIBarStyleBlack;

    [self presentModalViewController:objNavigationController animated:YES];

    [objNavigationController release];
    objNavigationController = nil;

    [objiPadDocumentReader release];
    objiPadDocumentReader = nil;
}
 
I use self.splitviewcontroller and use detailviewcontroller instance instead of self.
 
But it this case when we click o detailview controller to dismiss/remove rootviewcontroller it cause crash saying something like "no window for the view".
 
Also sometimes in iOS 5.1 the RootView shows in wrong orientation.
 
thanks in advance

原文：https://stackoverflow.com/questions/9818563