SIGABRT错误 - 将应用程序从xcode 3移植到xcode 4

Question

我最近将iPhone应用程序从xcode 3移植到xcode 4，并且出现SIGABRT错误。我已经找到了问题的行（这是注释掉线 - >在我的应用程序委托执行）：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {  

    // Override point for customization after application launch. 

    // Set the view controller as the window's root view controller and display. 
    self.window.rootViewController = self.viewController; 
    //navigationController = [[UINavigationController alloc] initWithRootViewController:self.window.rootViewController]; 
    navigationController.navigationBar.tintColor = [UIColor 
                 colorWithRed:217.0/255 
                 green:33.0/255 
                 blue:0 
                 alpha:1]; 
    navigationController.navigationBarHidden = YES; 
    [self.window addSubview:navigationController.view]; 
    [self.window makeKeyAndVisible]; 
    return YES; 
} 

任何想法，为什么navigationController = [[UINavigationController alloc] initWithRootViewController:self.window.rootViewController];导致问题？

编辑：编译器跳回主要方法并显示sigabrt错误。

int main(int argc, char *argv[]) { 

    NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 
    int retVal = UIApplicationMain(argc, argv, nil, nil); //jumps to this line 
    [pool release]; 
    return retVal; 
} 

Answer 1

你有什么太大的意义。试试这个：

navigationController = [[UINavigationController alloc] initWithRootViewController:self.viewController]; 
self.window.rootViewController = navigationController; 

并删除行[self.window addSubview:navigationController.view];。