Ios 在纵向模式下维护一个视图控制器，在横向模式下维护另一个视图控制器

我有一个iOS应用程序，有两个视图控制器，即-

FirstViewController

和

SecondViewController

我的窗口的rootViewController是UINavigationController

FirstViewController应仅在纵向模式下工作，而SecondViewController应仅在横向模式下工作

在Stackoverflow上搜索，我发现对于iOS6及以上版本，我必须在

UINavigationController

上创建一个类别，并覆盖

-支持的接口方向

问题

从FirstViewController开始。现在我的手机处于纵向模式，我按下SecondViewController，视图以纵向模式加载。一旦我将手机旋转到横向视图，视图将旋转到横向视图（从这一点开始，将根本不会返回到纵向视图）

当我弹回来时，FirstViewController将再次处于纵向（无论手机的方向如何）

我希望SecondViewController不应该以纵向模式显示。我整天绞尽脑汁……找不到解决办法

APPDELEGATE

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    ViewController *vc = [[ViewController alloc] init];

    self.navigationController = [[UINavigationController alloc] initWithRootViewController:vc];
    [self.navigationController setNavigationBarHidden:YES];
    self.window.rootViewController = self.navigationController;

    [self.window makeKeyAndVisible];

    return YES;
}

FirstViewController

- (IBAction)btnClicked:(id)sender
{
    SecondViewController *vc = [[SecondViewController alloc] init];
    [self.navigationController pushViewController:vc animated:NO];
}

#pragma mark - Rotation handlers
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationPortrait;
}

-(BOOL)shouldAutorotate
{
    return YES;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskPortrait;
}

- (IBAction)btnClicked:(id)sender
{
    [self.navigationController popViewControllerAnimated:YES];
}



#pragma mark - Rotation handlers
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationLandscapeRight);
}

-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeRight;
}

-(BOOL)shouldAutorotate
{
    return YES;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscapeRight;
}

SecondViewController

- (IBAction)btnClicked:(id)sender
{
    SecondViewController *vc = [[SecondViewController alloc] init];
    [self.navigationController pushViewController:vc animated:NO];
}

#pragma mark - Rotation handlers
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationPortrait;
}

-(BOOL)shouldAutorotate
{
    return YES;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskPortrait;
}

- (IBAction)btnClicked:(id)sender
{
    [self.navigationController popViewControllerAnimated:YES];
}



#pragma mark - Rotation handlers
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return (interfaceOrientation == UIInterfaceOrientationLandscapeRight);
}

-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return UIInterfaceOrientationLandscapeRight;
}

-(BOOL)shouldAutorotate
{
    return YES;
}

-(NSUInteger)supportedInterfaceOrientations
{
    return UIInterfaceOrientationMaskLandscapeRight;
}

u导航类别

@implementation UINavigationController (Rotation)

-(BOOL)shouldAutorotate
{
    //return [self.topViewController shouldAutorotate];
    return YES;
}


-(NSUInteger)supportedInterfaceOrientations
{
    return [self.topViewController supportedInterfaceOrientations];
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return [self.topViewController preferredInterfaceOrientationForPresentation];
}
@end

---

在我以前的应用程序中，我已经完成了

首先，您需要启用纵向、横向左侧和横向右侧方向来投影

现在

将以下代码设置为FirstViewController

-(void) viewWillAppear:(BOOL)animated{
[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait]; 
 }
      - (BOOL)shouldAutorotate
 {
       return NO;
 }

将下面的代码设置为secondViewController

#define degreesToRadian(x) (M_PI * (x) / 180.0)


 @implementation UINavigationController (Rotation_IOS6)

 -(BOOL)shouldAutorotate
{
 return [[self.viewControllers lastObject] shouldAutorotate];
 }

 -(NSUInteger)supportedInterfaceOrientations
 {
   return [[self.viewControllers lastObject] supportedInterfaceOrientations];
 }

 @end
 @interface secondViewController ()

 @end

 @implementation secondViewController

-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
    self.view.transform = CGAffineTransformIdentity;
    self.view.transform = CGAffineTransformMakeRotation(degreesToRadian(90));

 }
 - (BOOL)shouldAutorotate
{
   return YES;

 }

 - (NSUInteger)supportedInterfaceOrientations
 {
    return UIInterfaceOrientationMaskLandscape;
 }


  @end

---

嗯，有点晚了，但我是这么想的

当FirstVC是纵向的，Second可以是纵向的和横向的时，有很多解决方案，但是我找不到解决这个问题的好方法（仅第一个纵向和第二个横向）。以下是我所做的：

将两个视图控制器嵌入各自的导航控制器中。创建两个新类，比如第一个NavController和第二个NavController子类UINavigationController。将它们用作导航控制器。（如果您使用的是故事板，请选择导航控制器，转到Identity Inspector并更改“类”字段）

现在，在FirstNavController中，添加：

- (BOOL)shouldAutorotate 
{
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations 
{ 
    return UIInterfaceOrientationMaskPortrait;
}

在第二个导航控制器中：

- (BOOL)shouldAutorotate 
{
    return YES;
}

- (NSUInteger)supportedInterfaceOrientations 
{ 
    return UIInterfaceOrientationMaskLandscape;
}

您必须以模态方式呈现第二个NAVcontroller

无需在视图控制器中执行任何操作。确保在应用程序设置中添加所有必需的方向

---

这种方法的唯一缺点是，两个视图不在同一个导航堆栈中，因为第二个视图是以模式显示的，所以您不会看到“后退”按钮。但是，您可以自己添加一个取消/取消按钮，并在SecondVC中调用dismissViewControllerAnimated。

通过使用这样的转换，我只是在愚弄系统，使其相信它处于横向模式。如果我显示一个UIAlertView，它仍将处于纵向模式…如果我们使用导航控制器，这能工作吗？我不这么认为，因为单个视图上的仿射变换不会变换导航栏、状态栏等。通过使用上述代码，所有工作正常。在横向模式下，视图将显示。检查此屏幕截图，遮罩特定viewController上的方向。