Iphone 如何将navigationcontroller添加到uiviewcontroller

我试着这么说，它说的是糟糕的访问。[崩溃]

如何看待这个问题

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@提前感谢

您在第一行设置了自动释放（alloc/init）

然后在第三行显式释放视图控制器

因此，您过度释放此对象并导致崩溃

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您可以删除[employeeDetailed release]行，一切正常。

您不能将UINavigationController添加到现有的导航堆栈中。您不需要这样显示新的导航控制器模式：

employeeDetailed  = [[[EmployeeDetailedViewController alloc] initWithNibName:@"EmployeeDetailedViewController" bundle:nil] autorelease];
    UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:employeeDetailed] autorelease];
    [employeeDetailed release];
    [self.navigationController pushViewController:navController animated:YES];

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这将对您有用。请尝试一下。

我发现在应用程序的特定部分中显示导航控制器的最佳方法如下：

- (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.
    UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:self.viewController] autorelease];
    self.window.rootViewController = navController;
    [self.window makeKeyAndVisible];

    return YES;
}



employeeDetailed  = [[[EmployeeDetailedViewController alloc] initWithNibName:@"EmployeeDetailedViewController" bundle:nil] autorelease];

[self. navigationController presentModalViewController: navController];

然后在myViewController.m中 使用

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@谢谢，我忘了内存问题了。！你能帮我弄清楚怎么推ViewController吗？它不推铍，你不能把新的UINavigationController推到现有的导航堆栈上。您引用了self.navigationController，因此我假设当前控制器是堆栈的一部分。在这种情况下，您应该能够简单地使用：[self.navigationController pushViewController:employeeDetailed animated:YES]；是的，我使用了[self.navigationController-pushViewController:employeeDetailed-animated:YES]；控制器仍然没有做任何事情！self.navigationController是否存在？i、 e.您确定当前控制器是导航堆栈的一部分吗？我不想要presentmodalviewcontroller，先生。我需要PushView控制器，然后只按

员工详细信息

，不按

导航控制器

。

- (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.
    UINavigationController *navController = [[[UINavigationController alloc] initWithRootViewController:self.viewController] autorelease];
    self.window.rootViewController = navController;
    [self.window makeKeyAndVisible];

    return YES;
}



employeeDetailed  = [[[EmployeeDetailedViewController alloc] initWithNibName:@"EmployeeDetailedViewController" bundle:nil] autorelease];

[self. navigationController presentModalViewController: navController];

MyViewController *myViewController = [[MyViewController alloc]initwithnibname :@"MyViewController"];
    UINavigationController *myNavC = [[UINavigationController alloc]initWithRootViewController:myViewController];

[self.NavigationController pushViewController: XController animated:YES];