Ios 内容不'；如果我使用UINavigationController，请不要旋转

如果我在应用程序中使用UINavigationController，则应用程序内容不会旋转。只有状态栏方向会更改

这是我的didFinishLaunchingWithOptions方法

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.


    UIStoryboard* sb = [UIStoryboard storyboardWithName:@"Main"
                                                 bundle:nil];
    SpecificViewController *control=[sb instantiateViewControllerWithIdentifier:@"specific"];
    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:control];
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; [self.window setRootViewController:navigationController];

    return YES;
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.

    self.window.rootViewController =nil;
    UIStoryboard* sb = [UIStoryboard storyboardWithName:@"Main"
                                                 bundle:nil];
    SpecificViewController *control=[sb instantiateViewControllerWithIdentifier:@"specific"];
    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:control];

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

    return YES;
}

我不明白为什么我会得到这个结果

找到了它

最后，我找到了一个解决办法。但我不明白为什么

这是我的didFinishLaunchingWithOptions方法

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.


    UIStoryboard* sb = [UIStoryboard storyboardWithName:@"Main"
                                                 bundle:nil];
    SpecificViewController *control=[sb instantiateViewControllerWithIdentifier:@"specific"];
    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:control];
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]]; [self.window setRootViewController:navigationController];

    return YES;
}

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.

    self.window.rootViewController =nil;
    UIStoryboard* sb = [UIStoryboard storyboardWithName:@"Main"
                                                 bundle:nil];
    SpecificViewController *control=[sb instantiateViewControllerWithIdentifier:@"specific"];
    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:control];

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

    return YES;
}

这是SpecificViewController的viewDidLoad方法

- (void)viewDidLoad {
    [super viewDidLoad];

    [[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation:UIStatusBarAnimationNone];
    [[UIApplication sharedApplication] setStatusBarHidden:NO withAnimation:UIStatusBarAnimationNone];

    self.navigationItem.title=@"The Title";

}

我在plist文件中将“基于视图控制器的状态栏外观”属性设置为NO。

---

它现在起作用了，但我不明白这一切意味着什么以及为什么。

这对我来说很有效，请尝试：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    UIStoryboard* sb = [UIStoryboard storyboardWithName:@"Main"
                                                 bundle:nil];
    SpecificViewController *control=[sb instantiateViewControllerWithIdentifier:@"specific"];
    UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:control];
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    [self.window setRootViewController:navigationController];
    [self.window makeKeyAndVisible];

    return YES;
}

将此添加到SpecificViewController.m

- (BOOL)prefersStatusBarHidden
{
    return NO;
}

---

将“基于视图控制器的状态栏外观”属性设置为“是”，并从主界面选项中删除“Main”。您不需要使用setStatusBarHidden方法。

我认为您接受的答案在这里并不正确，我想如果它对您有效，这很好，但我仍然认为它是错误的

旋转不起作用的原因是因为您正在使用自动创建UIWindow的故事板。然后，在应用程序的didfishLaunching方法中，您分配了一个新的UIWindow。只有第一个UIWindow（由您的故事板创建）将接收旋转通知，这就是为什么您只注意到状态栏旋转而没有注意到视图

解决方案是从

didfishlaunchwithoptions

方法中删除以下行：

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

---

您的rootViewController也将在情节提要中设置，无需在代码中再次设置。

您缺少

[self.window makeKeyAndVisible]中的code>使用选项完成启动。