调用initWithFrame时无效,[黑屏];但如果保留下面的代码,它可用于显示主屏幕,不带标签栏,当使用标签栏时会出现黑屏
这里是代码
- (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;
}
所以如果离开如上所示,它可以工作,但如果我评论addSubview并取消注释initWithFrame,它就不起作用了,
//[self.window addSubview:startViewControllerView.view];
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
那么,我错过了什么?, 什么是调用initWithFrame的正确方法?
非常感谢!
答案 0 :(得分:1)
为什么所有的viewcontrollers都会自动发布?你可能应该保留它们并且只有在你完成它们时才释放它们。
至于你的结构,我发现为tabbarcontroller中的每个标签构建一个单独的导航控制器,将它们添加到控制器,然后将tabbarcontroller添加到窗口就像这样......
<强> AppDelegate.h 强>
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;
<强> AppDelegate.m 强>
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];