ios 6 iPhone window.rootViewController崩溃

Question

我的应用程序在iPad和iPhone上都能很好地使用iOS 5.1。在iOS 6中，应用程序在iPad上运行良好，但在设置window.rootViewController = navigationViewController时在iPhone中崩溃。我已经设置了异常断点，它会在application didFinishLaunchingWithOptions中的这段代码处停止执行。我甚至尝试将其添加为[window addSubView:navigationViewController.view]，但没有成功。有没有遇到过类似的问题。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:    (NSDictionary *)launchOptions
{
     self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
     rootViewController = [[SpringboardViewController alloc] initWithNibName:@"SpringboardViewController" bundle:nil];   
     UINavigationController *nav = [[UINavigationController alloc] initWithRootViewController:rootViewController];

    self.window.rootViewController = nav;
    self.window makeKeyAndVisible];
    return YES;
}

Answer 1

你能写一个异常吗？

看一下这些问题

applications expected to have a root view controller console

Applications are expected to have a root view controller at the end of application launch

Answer 2

感谢你们的回复，我发现了问题所在，问题出在应用调试器在self.window.rootViewController = nav时返回的是UIInterfaceOrientationPortrait而不是UIInterfaceOrientationMaskPortrait，我认为问题出在这条语句上。

谢谢Ravindharan和食人魔。