iPhone結合了標簽欄和navigationController

Question

我使用apple文檔以編程方式實現了組合的標簽欄和導航，

調用initWithFrame時不起作用，[進入黑屏]； 但是如果按下面的代碼所示，它將在不顯示標簽欄的情況下顯示主屏幕，並且在使用標簽欄時會顯示黑屏

這里的代碼

 - (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，如上圖所示，它可以工作，但是如果我對addSubview進行注釋並取消對initWithFrame的注釋，則它不起作用，

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

那么，我缺少什么？調用initWithFrame的正確方法是什么？

非常感謝！

Answer 1

為什么所有視圖控制器都自動發布？ 您可能應該保留它們並僅在完成使用后才釋放它們。

至於您的結構，我發現為tabbarcontroller中的每個選項卡構建一個導航控制器，將其添加到控制器，然后將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];