项目中写好了横屏适配，一直也忘了整理出来，今天正好周五有空记录一下
先在AppDelegate文件中添加

//AppDelegate.h
@property (nonatomic, assign) BOOL screenOrientations;    /**< 是否是横屏 */
- (void)setScreenOrientations:(BOOL)screenOrientations;

//AppDelegate.m
- (void)setScreenOrientations:(BOOL)screenOrientations {
    _screenOrientations = screenOrientations;
    [self application:[UIApplication sharedApplication] supportedInterfaceOrientationsForWindow:nil];
}

- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
    if (self.screenOrientations) {
        return UIInterfaceOrientationMaskAll;
    }
    return UIInterfaceOrientationMaskPortrait;
}

去要横屏的页面加入下面代码

//viewWillDisappear方法添加
[self.appDelegate setscreenOrientations:NO];

//viewDidLoad方法添加
  if (@available(iOS 16.0, *)) {
        [self.appDelegate setscreenOrientations:YES];
  }

/// 切换设备方向
- (void)p_switchOrientationWithLaunchScreen{
    if (@available(iOS 16.0, *)) {
        // setNeedsUpdateOfSupportedInterfaceOrientations 方法是 UIViewController 的方法，所以这个操作最好是放在控制器中去操作
        [self setNeedsUpdateOfSupportedInterfaceOrientations];
        NSArray *array = [[[UIApplication sharedApplication] connectedScenes] allObjects];
        UIWindowScene *scene = [array firstObject];
        // 屏幕方向
        UIInterfaceOrientationMask orientation = UIInterfaceOrientationMaskLandscapeRight;
        UIWindowSceneGeometryPreferencesIOS *geometryPreferencesIOS = [[UIWindowSceneGeometryPreferencesIOS alloc] initWithInterfaceOrientations:orientation];
        // 开始切换
        [scene requestGeometryUpdateWithPreferences:geometryPreferencesIOS errorHandler:^(NSError * _Nonnull error) {
        }];
    } else {
        [self swichOldOrientation:UIInterfaceOrientationLandscapeRight];
    }
}
/// iOS16 之前进行横竖屏切换方式
- (void)swichOldOrientation:(UIInterfaceOrientation)interfaceOrientation {
    NSNumber *orientationTarget = [NSNumber numberWithInteger:interfaceOrientation];
    [[UIDevice currentDevice] setValue:orientationTarget forKey:@"orientation"];
}

在我的swift项目中貌似没啥影响，如果下面代码不行，可以自行将上面的oc代码转成swift

  /// 屏幕方向
    override open var supportedInterfaceOrientations: UIInterfaceOrientationMask {
        return .landscapeRight
    }