iOS (9 &10) 应用程序不会颠倒旋转

Question

我遇到了麻烦，如果我将 phone 倒置，我的应用程序就会被迫倒置旋转。

我有一个包含两个场景的故事板文件： NavigationControllerScenes and MainScene / SettingsScene

在 info.plist 中，我选中了以纵向或倒置方向开始的框。

在我添加的应用委托中：

#if __IPHONE_OS_VERSION_MAX_ALLOWED < 90000
    - (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
    #else
    - (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window
    #endif
    {
      return UIInterfaceOrientationMaskPortrait;
    }

在设置视图控制器中：

        - (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation // iOS 6 autorotation fix
    {
        return UIInterfaceOrientationPortraitUpsideDown;
    }


    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
    {
        return YES;
    }

    - (BOOL)shouldAutorotate  // iOS 6 autorotation fix
    {
        return YES;
    }
    - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
    {
        self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
        if (self) {
            // Custom initialization
        }
        return self;
    }

#if __IPHONE_OS_VERSION_MAX_ALLOWED < 90000
        - (NSUInteger)supportedInterfaceOrientations{
    #else
    - (UIInterfaceOrientationMask)supportedInterfaceOrientations
    #endif
    {
        return UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskPortraitUpsideDown;
    }

}

在主视图控制器中

        - (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation // iOS 6 autorotation fix
    {
        return UIInterfaceOrientationPortraitUpsideDown;
    }


    - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
    {
        return YES;
    }

    - (BOOL)shouldAutorotate  // iOS 6 autorotation fix
    {
        return YES;
    }
    - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
    {
        self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
        if (self) {
            // Custom initialization
        }
        return self;
    }


    #if __IPHONE_OS_VERSION_MAX_ALLOWED < 90000
            - (NSUInteger)supportedInterfaceOrientations
    #else
    - (UIInterfaceOrientationMask)supportedInterfaceOrientations
    #endif
    {
        return UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskPortraitUpsideDown;
    }

可以横向和纵向旋转，但不能上下颠倒纵向。如果我取消选中 info.plist 中的纵向框并只选中倒置框，应用程序将在一开始就崩溃。所以我认为缺少设置...

我不明白的是，我可以在不同的应用程序中成功地使用这些代码片段，只有一个场景 - 所以我认为错误来自多个场景。也许我需要创建一个覆盖某些方法的 navigationController。

还有一件事：这不起作用 - 应用程序执行语句但没有任何反应：

NSNumber * value = [NSNumber numberWithInt:UIInterfaceOrientationPortraitUpsideDown];
[[UIDevice currentDevice] setValue:value forKey:@"orientation"];

在一个场景的应用程序中它有效！

Answer 1

最后我自己找到了答案：

创建一个 CustomNavigationController class 如下：

// .h file
#import <UIKit/UIKit.h>
@interface CustomNavigationController : UINavigationController
@end

// .m file
#import "CustomNavigationController.h"

@interface CustomNavigationController ()

@end

@implementation CustomNavigationController

- (BOOL)shouldAutorotate
{
    return self.topViewController.shouldAutorotate;
}
- (NSUInteger)supportedInterfaceOrientations
{
    return self.topViewController.supportedInterfaceOrientations;
}

@end

在故事板中单击导航控制器场景。在自定义 class 部分添加创建的 class as shown here

iOS (9 &10) 应用程序不会颠倒旋转

iOS (9 &10) App does not rotate upside down

ios

objective-c

orientation

landscape-portrait

portrait