iOS16设备切换横竖屏

设置iOS设备横竖屏，因为iOS16之后有多个window的概念，切换横竖屏需要新的api，因此写一篇文章和演示用的demo供大家参考。

监听横竖屏业务区，涉及控制器，appdelegate等文件

下载demo

里面核心代码

/// 切换设备方向，赋值appdelegate用于决定屏幕方向。
/// - Parameter isLaunchScreen: 是否是全屏

- (void)p_switchOrientationWithLaunchScreen:(BOOL)isLaunchScreen {
    AppDelegate *appdelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
    if (isLaunchScreen) {
        // 全屏操作
        appdelegate.allowRotation = 2;
    } else {
        // 退出全屏操作
        appdelegate.allowRotation = 0;
    }

    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 = isLaunchScreen ? UIInterfaceOrientationMaskLandscapeRight : UIInterfaceOrientationMaskPortrait;
        UIWindowSceneGeometryPreferencesIOS *geometryPreferencesIOS = [[UIWindowSceneGeometryPreferencesIOS alloc] initWithInterfaceOrientations:orientation];
        // 开始切换
        [scene requestGeometryUpdateWithPreferences:geometryPreferencesIOS errorHandler:^(NSError * _Nonnull error) {
            NSLog(@"强制%@错误:%@", isLaunchScreen ? @"横屏" : @"竖屏", error);
        }];
    } else {
        [self p_swichToNewOrientation:isLaunchScreen ? UIInterfaceOrientationLandscapeRight : UIInterfaceOrientationPortrait];
    }
}

-(void)setAllowRotation:(NSInteger)allowRotation{
    if(_allowRotation !=allowRotation){
        _allowRotation = allowRotation;
    }
}

- (UIInterfaceOrientationMask)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window {
    if (self.allowRotation == 1) {
        return UIInterfaceOrientationMaskAllButUpsideDown;
    }else if (self.allowRotation == 0){
        return UIInterfaceOrientationMaskPortrait;
    }else{
        UIDeviceOrientation orientation = [UIDevice currentDevice].orientation;
        if (orientation == UIDeviceOrientationLandscapeLeft || orientation == UIDeviceOrientationLandscapeRight) {
            return UIInterfaceOrientationMaskLandscape;
        }else {
            return UIInterfaceOrientationMaskLandscape;
        }
    }
}

/// iOS16 之前进行横竖屏切换方式
需要切换的方向

- (void)p_swichToNewOrientation:(UIInterfaceOrientation)interfaceOrientation {
    NSNumber *orientationTarget = [NSNumber numberWithInteger:interfaceOrientation];
    [[UIDevice currentDevice] setValue:orientationTarget forKey:@"orientation"];
}

//监听横竖屏变化

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator {
    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];
    BOOL isLaunchScreen = NO;
    if (@available(iOS 16.0, *)) {
        NSArray *array = [[[UIApplication sharedApplication] connectedScenes] allObjects];
        UIWindowScene *scene = [array firstObject];
        isLaunchScreen = scene.interfaceOrientation == UIInterfaceOrientationLandscapeRight;
    } else {）
        // UIDeviceOrientationLandscapeLeft // Device oriented horizontally, home button on the right
        isLaunchScreen = [UIDevice currentDevice].orientation == UIDeviceOrientationLandscapeLeft;
    }
    NSLog(@"将要%@", isLaunchScreen ? @"横屏" : @"竖屏");
    [self p_updateViewWithIsLaunchScreen:isLaunchScreen size:size];
}

- (void)p_updateViewWithIsLaunchScreen:(BOOL)isLaunchScreen size:(CGSize)size {
    if (isLaunchScreen) {
       
        
    } else {
       
    }
}