应用程序适用于iPhone; iPad模拟器只提供黑屏

Question

这是来自app delegate的applicationDidLaunch方法：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[self.window makeKeyAndVisible];

                //This hides the status bar throughout the app.

[UIApplication sharedApplication].statusBarHidden=YES;


NSMutableArray *tabItems = [[NSMutableArray alloc] initWithCapacity:5];

GHHaikuViewController *hvc = [[GHHaikuViewController alloc] init];
hvc.tabBarItem.title = @"Home";
hvc.tabBarItem.image = [UIImage imageNamed:@"53-house.png"];
[tabItems addObject:hvc];

GHComposeViewController *cvc = [[GHComposeViewController alloc] init];
cvc.tabBarItem.title = @"Compose";
cvc.tabBarItem.image = [UIImage imageNamed:@"216-compose.png"];
[tabItems addObject:cvc];

GHWebViewController *wvc = [[GHWebViewController alloc] init];
wvc.tabBarItem.title = @"Buy";
wvc.tabBarItem.image = [UIImage imageNamed:@"80-shopping-cart.png"];
[tabItems addObject:wvc];

GHFeedback *fvc = [[GHFeedback alloc] init];
fvc.tabBarItem.title = @"Feedback";
fvc.tabBarItem.image = [UIImage imageNamed:@"18-envelope.png"];
[tabItems addObject:fvc];

GHSettingsViewController *svc = [[GHSettingsViewController alloc] init];
svc.tabBarItem.title = @"Settings";
svc.tabBarItem.image = [UIImage imageNamed:@"20-gear-2.png"];
[tabItems addObject:svc];

UITabBarController *tbc = [[UITabBarController alloc] init];
tbc.viewControllers = tabItems;
self.window.rootViewController = tbc;

return YES;
}

此处来自第一个视图控制器的viewDidLoad，为简洁起见进行了简化：

-(void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
background.backgroundColor = [UIColor whiteColor];
[self.view addSubview:background];
NSLog(@"View loaded.");
}

iPhone上的一切正常。在iPad（或至少模拟器），＆＃34;查看已加载＆＃34;日志，但它不是白色屏幕，而是黑色。早些时候我正在玩iPad的故事板，但是我删除了它，我认为我删除了所有文件，现在一切都是从代码运行的。我已经清理了这个项目。我在俯瞰什么？

编辑：以下是Xcode中目标摘要的一个镜头。

Answer 1

如果您不使用主故事板或xib，则需要在代码中创建UIWindow：

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

Answer 2

确保在项目设置中清除iPad的故事板。删除故事板时，IMO Xcode不会删除该条目。你应该只在那里配置iPhone的故事板。