iOS 横竖屏UI切换#

一、第三方支援#

pod 'HXRotationTool' # https://github.com/TheLittleBoy/HXRotationTool

二、xcode 设置#

三、`Info.plist` 设置#

iPhone 应用

<key>UISupportedInterfaceOrientations</key>
<array>
    <string>UIInterfaceOrientationPortrait</string>
    <string>UIInterfaceOrientationPortraitUpsideDown</string>
    <string>UIInterfaceOrientationLandscapeLeft</string>
    <string>UIInterfaceOrientationLandscapeRight</string>
</array>

iPad 应用

<key>UISupportedInterfaceOrientations~ipad</key>
<array>
    <string>UIInterfaceOrientationPortrait</string>
    <string>UIInterfaceOrientationPortraitUpsideDown</string>
    <string>UIInterfaceOrientationLandscapeLeft</string>
    <string>UIInterfaceOrientationLandscapeRight</string>
</array>

四、代码处理#

相关枚举说明

UIInterfaceOrientationMask用于指定应用支持的界面方向的位掩码。它的值可以组合使用，以定义应用程序支持的方向

typedef NS_OPTIONS(NSUInteger, UIInterfaceOrientationMask) {
    UIInterfaceOrientationMaskPortrait = (1 << UIInterfaceOrientationPortrait),/// 表示设备处于竖屏（Portrait）模式。
    UIInterfaceOrientationMaskLandscapeLeft = (1 << UIInterfaceOrientationLandscapeLeft),/// 表示设备处于左横屏（Landscape Left）模式。
    UIInterfaceOrientationMaskLandscapeRight = (1 << UIInterfaceOrientationLandscapeRight),/// 表示设备处于右横屏（Landscape Right）模式。
    UIInterfaceOrientationMaskPortraitUpsideDown = (1 << UIInterfaceOrientationPortraitUpsideDown),/// 表示设备处于倒竖屏（Portrait Upside Down）模式。
    UIInterfaceOrientationMaskLandscape = (UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight), /// 表示设备可以处于任意横屏（Landscape）模式，包括左横屏和右横屏。
    UIInterfaceOrientationMaskAll = (UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight | UIInterfaceOrientationMaskPortraitUpsideDown),/// 表示设备可以处于所有方向，包括竖屏、左横屏、右横屏和倒竖屏。
    UIInterfaceOrientationMaskAllButUpsideDown = (UIInterfaceOrientationMaskPortrait | UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight),/// 表示设备可以处于所有方向，但不包括倒竖屏。
} API_UNAVAILABLE(tvos);

UIInterfaceOrientation 描述界面当前的方向，用于确定应用界面是如何显示的。其值包括：

通常与 UIInterfaceOrientationMask 中定义的支持方向进行比较

typedef NS_ENUM(NSInteger, UIInterfaceOrientation) {
    UIInterfaceOrientationUnknown            = UIDeviceOrientationUnknown, /// 界面方向未知或不确定。这通常用于初始化或错误状态
    UIInterfaceOrientationPortrait           = UIDeviceOrientationPortrait, /// 设备处于竖屏（Portrait）模式，即设备的顶部朝上
    UIInterfaceOrientationPortraitUpsideDown = UIDeviceOrientationPortraitUpsideDown,/// 设备处于倒竖屏（Portrait Upside Down）模式，即设备的顶部朝下
    UIInterfaceOrientationLandscapeLeft      = UIDeviceOrientationLandscapeRight, /// 设备处于左横屏（Landscape Left）模式。❤️注意，这个方向对应于设备顶部向右（而不是向左），这与其名称可能引起的直观理解不同❤️
    UIInterfaceOrientationLandscapeRight     = UIDeviceOrientationLandscapeLeft /// 设备处于右横屏（Landscape Right）模式。同样地，这个方向对应于设备顶部向左
} API_UNAVAILABLE(tvos);

UIDeviceOrientation 描述设备本身的物理方向，即设备如何被用户持握。其值包括：

虽然它有时与 UIInterfaceOrientation 一致，但它们并不总是相同
例如，在设备平放时（UIDeviceOrientationFaceUp 或 UIDeviceOrientationFaceDown）

typedef NS_ENUM(NSInteger, UIDeviceOrientation) {
     UIDeviceOrientationUnknown, /// 设备方向未知或不确定。这通常用于初始化或错误状态
     UIDeviceOrientationPortrait,            /// 设备竖直放置，设备底部的 Home 键在底部（设备顶部朝上）
     UIDeviceOrientationPortraitUpsideDown,  /// 设备竖直放置，设备底部的 Home 键在顶部（设备顶部朝下）
     UIDeviceOrientationLandscapeLeft,       /// 设备水平放置，设备底部的 Home 键在右侧（设备顶部朝左）
     UIDeviceOrientationLandscapeRight,      /// 设备水平放置，设备底部的 Home 键在左侧（设备顶部朝右）
     UIDeviceOrientationFaceUp,              /// 设备平放，屏幕朝上
     UIDeviceOrientationFaceDown             /// 设备平放，屏幕朝下
} API_UNAVAILABLE(tvos);

代码示例

在 UITabBarController 中适配横屏

@interface MyTabBarController : UITabBarController
@end

@implementation MyTabBarController

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

- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return [self.selectedViewController supportedInterfaceOrientations];
}

@end

在 UINavigationController 中适配横屏

@interface MyNavigationController : UINavigationController
@end

@implementation MyNavigationController

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

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

@end

确保所有子视图控制器正确实现了旋转方法

@interface MyViewController : UIViewController
@end

@implementation MyViewController

- (BOOL)shouldAutorotate {
    return YES;
}

- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskAllButUpsideDown;
}

@end

关键方法说明

如果需要一进App就实现横屏转向，需要在AppDelegate.m里面实现：

- (UIInterfaceOrientationMask)application:(UIApplication *)application 
  supportedInterfaceOrientationsForWindow:(UIWindow *)window {
    return UIInterfaceOrientationMaskLandscape;
}

在具体的子控制器里面实现，决定这个控制器页面是否横屏

/// 决定当前界面是否开启自动转屏，如果返回NO，后面两个方法也不会被调用，只是会支持默认的方向
- (BOOL)shouldAutorotate {
    return YES;
}
/// 当前控制器支持的屏幕旋转方向（在具体的控制器子类进行覆写）
/// iPad设备上，默认返回值UIInterfaceOrientationMaskAllButUpSideDwon
/// iPhone设备上，默认返回值是UIInterfaceOrientationMaskAll
- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskAll;
}
/// 设置进入界面默认支持的方向
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{
    return [super preferredInterfaceOrientationForPresentation];
}

通知监听UIDeviceOrientationDidChangeNotification

/// 设备方向
JobsAddNotification(self,
                selectorBlocks(^id _Nullable(id _Nullable weakSelf,
                                          id _Nullable arg){
    NSNotification *notification = (NSNotification *)arg;
    if([notification.object isKindOfClass:NSNumber.class]){
        NSNumber *b = notification.object;
        NSLog(@"SSS = %d",b.boolValue);
    }
    @jobs_strongify(self)
    NSLog(@"通知传递过来的 = %@",notification.object);

    switch (UIDevice.currentDevice.orientation) {
            // 处理竖屏方向的逻辑
        case UIDeviceOrientationPortrait:/// 设备竖直向上，Home 按钮在下方
            NSLog(@"系统通知：↓");
            break;
        case UIDeviceOrientationPortraitUpsideDown:/// 设备竖直向下，Home 按钮在上方
            NSLog(@"系统通知：↑");
            break;
            // 处理横屏方向的逻辑
        case UIDeviceOrientationLandscapeLeft:/// 设备水平，Home 按钮在右侧
            NSLog(@"系统通知：→");
            break;
        case UIDeviceOrientationLandscapeRight:/// 设备水平，Home 按钮在左侧
            NSLog(@"系统通知：←");
            break;
        default:
            break;
    }

    return nil;
},nil, self),UIDeviceOrientationDidChangeNotification,nil);

五、屏幕上下倒立不可用#

技术上是可能的，但实际使用中可能受到限制
目前涉及的iPhone全面屏（包括:刘海屏 或者 动态岛）系列，不支持倒立（上下颠倒）屏幕方向。这是 Apple 的设计决定，主要基于以下几个原因：
- 用户体验：刘海屏的设计使得倒立使用时，“刘海"或"动态岛"会位于屏幕底部，这可能会影响用户体验和交互
- 硬件限制：前置摄像头、扬声器和各种传感器都集中在"刘海"区域，倒立使用可能会影响这些硬件的正常功能
- 设计一致性：保持界面的一致性，避免在不同设备间出现使用差异
具体来说，以下 iPhone 型号不支持倒立屏幕：iPhone X 及之后的所有型号（包括 iPhone XS, XR, 11, 12, 13, 14, 15 系列等）
对于应用开发，如果 App 特别需要支持倒立显示（例如，为了在某些特殊场景下方便查看内容），可能需要考虑实现自定义的界面旋转逻辑，而不是依赖系统的屏幕旋转

六、横竖屏检测·相关测评报告#

结论
- 不要在UITabBarController * 和挂载到的其子控制器上去做屏幕方向检测。因为涉及到应用程序初始化的中间过程，取值会是系统调整过程的中间值，不准确
- 在AppDelegate里面适配是强制性的，所以优先级最高
- 如果没有在AppDelegate里面适配，在实操过程中考虑选用UIDevice.currentDevice.orientation
- UIDevice.currentDevice.orientation不是总是有效。在应用启动时，设备方向信息有时可能还没有完全初始化，这可能导致得到 UIDeviceOrientationUnknown
- 如果一定要在UITabBarController * 和挂载到的其子控制器上去做屏幕方向检测，那么使用枚举，标的物为人工强制性的对其赋值
  全局的
```
/// 一进入App就横屏
- (UIInterfaceOrientationMask)application:(UIApplication *)application
  supportedInterfaceOrientationsForWindow:(UIWindow *)window {
    JobsAppTool.currentInterfaceOrientation = UIInterfaceOrientationLandscapeLeft | UIInterfaceOrientationLandscapeRight;
    JobsAppTool.currentDeviceOrientation = UIDeviceOrientationLandscapeLeft | UIDeviceOrientationLandscapeRight;
    JobsAppTool.currentInterfaceOrientationMask = UIInterfaceOrientationMaskLandscape;
    return UIInterfaceOrientationMaskLandscape;
}
```
- 其实系统有3个维度来综合评估当前是否为横屏
  - 设备真实的方向（定义手机横卧为横屏）
  - 具体的某个控制器门内是否做了横屏适配
  - 在AppDelegate里面适配
- 系统通知UIDeviceOrientationDidChangeNotification也是需要服从界面UI的生命周期，否则取值不成功
以下测评数据，各个相关的控制器均做了横屏适配

#pragma mark —— 在 当前控制器 中适配横屏
/// 适配横屏
- (BOOL)shouldAutorotate {
    return YES;
}
/// 当前控制器支持的屏幕旋转方向（在具体的控制器子类进行覆写）
/// iPad设备上，默认返回值UIInterfaceOrientationMaskAllButUpSideDwon
/// iPhone设备上，默认返回值是UIInterfaceOrientationMaskAll
- (UIInterfaceOrientationMask)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskAllButUpsideDown;
}
/// 设置进入界面默认支持的方向
- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{
    return [super preferredInterfaceOrientationForPresentation];
}

<font id=在AppDelegate里面适配>在AppDelegate里面适配：- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window 优先级最高
```
- (UIInterfaceOrientationMask)application:(UIApplication *)application
  supportedInterfaceOrientationsForWindow:(UIWindow *)window {
    return UIInterfaceOrientationMaskLandscape;
}
```

测评数据

DeviceOrientation d = self.getDeviceOrientation;
UIInterfaceOrientation s = self.getInterfaceOrientation;
UIDeviceOrientation f =  UIDevice.currentDevice.orientation;
NSLog(@"");

1、<font id=锚定`UIDevice.currentDevice.orientation`>锚定`UIDevice.currentDevice.orientation`（需要真机配合）#

不 在AppDelegate里面适配

当前设备横屏

`UIViewController`的生命周期方法	挂载到`UITabBarController`的子vc	UITabBarController *	普通UIViewController *
- (void)viewDidLoad	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown
-(void)viewWillAppear:(BOOL)animated	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown
-(void)viewDidAppear:(BOOL)animated	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown

当前设备竖屏

`UIViewController`的生命周期方法	挂载到`UITabBarController`的子vc	UITabBarController *	普通UIViewController *
- (void)viewDidLoad	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown
-(void)viewWillAppear:(BOOL)animated	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown
-(void)viewDidAppear:(BOOL)animated	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown

在AppDelegate里面适配

当前设备横屏

`UIViewController`的生命周期方法	挂载到`UITabBarController`的子vc	UITabBarController *	普通UIViewController *
- (void)viewDidLoad	UIDeviceOrientationLandscapeRight	UIDeviceOrientationUnknown	UIDeviceOrientationLandscapeRight
-(void)viewWillAppear:(BOOL)animated	UIDeviceOrientationLandscapeRight	UIDeviceOrientationUnknown	UIDeviceOrientationLandscapeRight
-(void)viewDidAppear:(BOOL)animated	UIDeviceOrientationLandscapeRight	UIDeviceOrientationLandscapeRight	UIDeviceOrientationLandscapeRight

当前设备竖屏

`UIViewController`的生命周期方法	挂载到`UITabBarController`的子vc	UITabBarController *	普通UIViewController *
- (void)viewDidLoad	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown
-(void)viewWillAppear:(BOOL)animated	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown
-(void)viewDidAppear:(BOOL)animated	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown	UIDeviceOrientationUnknown

2、<font id=锚定场景方向`UIInterfaceOrientation`>锚定场景方向`UIInterfaceOrientation`#

-(UIInterfaceOrientation)getInterfaceOrientation{
    UIInterfaceOrientation __block currentOrientation = UIInterfaceOrientationUnknown;
    if (@available(iOS 13.0, *)) {
        [self getViewByBlock:^id _Nullable(ComponentType componentType,
                                           UIView * _Nullable data) {
            /// 获取当前窗口场景的界面方向
            currentOrientation = data.window.windowScene.interfaceOrientation;
            return nil;
        }];
    } else {
        SuppressWdeprecatedDeclarationsWarning(currentOrientation = UIApplication.sharedApplication.statusBarOrientation;);
    }return currentOrientation;
}

不 在AppDelegate里面适配

当前设备横屏

`UIViewController`的生命周期方法	挂载到`UITabBarController`的子vc	UITabBarController *	普通UIViewController *
- (void)viewDidLoad	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown
-(void)viewWillAppear:(BOOL)animated	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown
-(void)viewDidAppear:(BOOL)animated	UIInterfaceOrientationPortrait❌	UIInterfaceOrientationPortrait❌	UIInterfaceOrientationPortrait❌

当前设备竖屏

`UIViewController`的生命周期方法	挂载到`UITabBarController`的子vc	UITabBarController *	普通UIViewController *
- (void)viewDidLoad	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown
-(void)viewWillAppear:(BOOL)animated	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown
-(void)viewDidAppear:(BOOL)animated	UIInterfaceOrientationPortrait	UIInterfaceOrientationPortrait	UIInterfaceOrientationPortrait

在AppDelegate里面适配

当前设备横屏

`UIViewController`的生命周期方法	挂载到`UITabBarController`的子vc	UITabBarController *	普通UIViewController *
- (void)viewDidLoad	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown
-(void)viewWillAppear:(BOOL)animated	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown
-(void)viewDidAppear:(BOOL)animated	UIInterfaceOrientationLandscapeLeft	UIInterfaceOrientationLandscapeLeft	UIInterfaceOrientationLandscapeLeft

当前设备竖屏

`UIViewController`的生命周期方法	挂载到`UITabBarController`的子vc	UITabBarController *	普通UIViewController *
- (void)viewDidLoad	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown
-(void)viewWillAppear:(BOOL)animated	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown	UIInterfaceOrientationUnknown
-(void)viewDidAppear:(BOOL)animated	UIInterfaceOrientationPortrait❌	UIInterfaceOrientationPortrait❌	UIInterfaceOrientationLandscapeRight

3、<font id=锚定`view.traitCollection.verticalSizeClass`>锚定`view.traitCollection.verticalSizeClass`#

-(DeviceOrientation)getDeviceOrientation

-(DeviceOrientation)getDeviceOrientation{
    UIView *view = self.getView;
    if(view){
        if(view.traitCollection.verticalSizeClass == UIUserInterfaceSizeClassCompact){
            return DeviceOrientationLandscape;
        }else{
            return DeviceOrientationPortrait;
        }
    }else return DeviceOrientationUnknown;
}

-(UIView *_Nullable)getView{
    UIView *view = nil;
    if ([self isKindOfClass:UIView.class]) {
        view = (UIView *)self;
    }else if ([self isKindOfClass:UIViewController.class]){
        UIViewController *vc = (UIViewController *)self;
        view = vc.view;
    }return view;
}

/// 屏幕方向
#ifndef DeviceOrientation_typedef
#define DeviceOrientation_typedef
typedef NS_ENUM(NSInteger, DeviceOrientation) {
    DeviceOrientationUnknown, /// 未知方向
    DeviceOrientationPortrait,/// 竖屏
    DeviceOrientationLandscape /// 横屏
};
#endif /* DeviceOrientation_typedef */

不 在AppDelegate里面适配

当前设备横屏

`UIViewController`的生命周期方法	挂载到`UITabBarController`的子vc	UITabBarController *	普通UIViewController *
- (void)viewDidLoad	DeviceOrientationPortrait❌	DeviceOrientationPortrait❌	DeviceOrientationPortrait❌
-(void)viewWillAppear:(BOOL)animated	DeviceOrientationPortrait❌	DeviceOrientationPortrait❌	DeviceOrientationPortrait❌
-(void)viewDidAppear:(BOOL)animated	DeviceOrientationPortrait❌	DeviceOrientationPortrait❌	DeviceOrientationPortrait❌

当前设备竖屏

`UIViewController`的生命周期方法	挂载到`UITabBarController`的子vc	UITabBarController *	普通UIViewController *
- (void)viewDidLoad	DeviceOrientationPortrait	DeviceOrientationPortrait	DeviceOrientationPortrait
-(void)viewWillAppear:(BOOL)animated	DeviceOrientationPortrait	DeviceOrientationPortrait	DeviceOrientationPortrait
-(void)viewDidAppear:(BOOL)animated	DeviceOrientationPortrait	DeviceOrientationPortrait	DeviceOrientationPortrait

在AppDelegate里面适配

当前设备横屏

`UIViewController`的生命周期方法	挂载到`UITabBarController`的子vc	UITabBarController *	普通UIViewController *
- (void)viewDidLoad	DeviceOrientationPortrait❌	DeviceOrientationPortrait❌	DeviceOrientationLandscape
-(void)viewWillAppear:(BOOL)animated	DeviceOrientationPortrait❌	DeviceOrientationPortrait❌	DeviceOrientationLandscape
-(void)viewDidAppear:(BOOL)animated	DeviceOrientationLandscape	DeviceOrientationLandscape	DeviceOrientationLandscape

当前设备竖屏

`UIViewController的` 生命周期方法	挂载到`UITabBarController`的子vc	UITabBarController *	普通UIViewController *
- (void)viewDidLoad	DeviceOrientationPortrait❌	DeviceOrientationPortrait❌	DeviceOrientationLandscape
-(void)viewWillAppear:(BOOL)animated	DeviceOrientationPortrait❌	DeviceOrientationPortrait❌	DeviceOrientationLandscape
-(void)viewDidAppear:(BOOL)animated	DeviceOrientationPortrait❌	DeviceOrientationPortrait❌	DeviceOrientationLandscape

七、测评结论#

以上测评结论均来自iOS模拟器。其中UIDevice.currentDevice.orientation取值需要真机配合
以上测评判定标准
- 如果配置了- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window为横屏模式（默认为竖屏模式），但是终值为竖屏，则为错误读取
- 如果不配置- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window为横屏模式（默认为竖屏模式），则以当前设备定位为准
对于页面，因为需要根据相关配置做自适应调整，那么以靠后的生命周期读取值为准
- 比如在viewController里面-(void)viewDidAppear:(BOOL)animated的值为最终系统在综合各种因素后调整后的值
- 不要去关心中间值，以终值为准，这样方便定位我们从何时调用方法为有效调用
一般的架构是将UITabBarController及其子类作为根控制器，那么在呈现页面的时候，内部会去调整UI适配横竖屏。所以，UITabBarController及其子类以及挂载在上面的子控制器，均是需要在页面生命周期走完以后（即，-(void)viewDidAppear:(BOOL)animated以后）才能获取到正确的值
如果锚定UIDevice.currentDevice.orientation
- 不可用
如果锚定场景方向UIInterfaceOrientation
- 只在普通UIViewController *可用
如果锚定view.traitCollection.verticalSizeClass
- 只在普通UIViewController *可用

iOS 横竖屏UI切换#

iOS 横竖屏UI切换#

一、第三方支援#

二、xcode 设置#

三、Info.plist 设置#

四、代码处理#

五、屏幕上下倒立不可用#

六、横竖屏检测·相关测评报告#

1、<font id=锚定UIDevice.currentDevice.orientation>锚定UIDevice.currentDevice.orientation（需要真机配合）#

2、<font id=锚定场景方向UIInterfaceOrientation>锚定场景方向UIInterfaceOrientation#

3、<font id=锚定view.traitCollection.verticalSizeClass>锚定view.traitCollection.verticalSizeClass#

七、 测评结论#

三、`Info.plist` 设置#

1、<font id=锚定`UIDevice.currentDevice.orientation`>锚定`UIDevice.currentDevice.orientation`（需要真机配合）#

2、<font id=锚定场景方向`UIInterfaceOrientation`>锚定场景方向`UIInterfaceOrientation`#

3、<font id=锚定`view.traitCollection.verticalSizeClass`>锚定`view.traitCollection.verticalSizeClass`#

七、测评结论#