iPhone结合了标签栏和navigationController

Question

我使用apple文档以编程方式实现了组合的标签栏和导航，

调用initWithFrame时不起作用，[进入黑屏]； 但是如果按下面的代码所示，它将在不显示标签栏的情况下显示主屏幕，并且在使用标签栏时会显示黑屏

这里的代码

 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:( NSDictionary *)launchOptions { self.tabBarController = [[[UITabBarController alloc] init] autorelease]; StartViewController *startViewControllerView = [[[StartViewController alloc] init] autorelease]; //ojo recomendado por apple!!! VideosViewController* VideosViewController_ = [[[VideosViewController alloc] init] autorelease]; PhotosViewController* PhotosViewController_ = [[[PhotosViewController alloc] init] autorelease]; SocialViewController* SocialViewController_ = [[[SocialViewController alloc] init] autorelease]; self.pagesNavigation = [[[UINavigationController alloc] initWithRootViewController:startViewControllerView] autorelease]; self.pagesNavigation.navigationBarHidden = NO; NSArray* controllers = [NSArray arrayWithObjects:VideosViewController_, PhotosViewController_, SocialViewController_, startViewControllerView, nil]; self.tabBarController.viewControllers = controllers; 

[self.window addSubview:startViewControllerView.view];
//self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
[self.window makeKeyAndVisible];
  return YES;
}

因此，如上图所示，它可以工作，但是如果我对addSubview进行注释并取消对initWithFrame的注释，则它不起作用，

  //[self.window addSubview:startViewControllerView.view];
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];

那么，我缺少什么？调用initWithFrame的正确方法是什么？

非常感谢！

Answer 1

为什么所有视图控制器都自动发布？ 您可能应该保留它们并仅在完成使用后才释放它们。

至于您的结构，我发现为tabbarcontroller中的每个选项卡构建一个导航控制器，将其添加到控制器，然后将tabbarcontroller添加到窗口，如下所示：

AppDelegate.h

property (nonatomic, retain) UITabBarController *tabBarController;
property (nonatomic, retain) UINavigationController *firstNavController;
property (nonatomic, retain) UINavigationController *secondNavController;
property (nonatomic, retain) FirstViewController *firstViewController;
property (nonatomic, retain) SecondViewController *secondViewController;

AppDelegate.m

firstViewController = [[FirstViewController alloc] someInitMethod:someArg];
firstNavController = [[UINavigationController alloc] initWithRootViewController:firstViewController]; 

secondViewController = [[SecondViewController alloc] someInitMethod:someArg];
secondNavController = [[UINavigationController alloc] initWithRootViewController:secondViewController]; 

tabBarController = [[UITabbarController alloc] init];

NSArray *tabs = [NSArray arrayWithObjects:firstNavController, secondNavController, nil];

[tabBarController setViewControllers:tabs animated:NO];

self.window.rootViewController = tabBarController;
[self.window makeKeyAndVisible];