iOS16之前切換橫豎屏使用的是UIDevice的setValue:forKey:方法進(jìn)行切換。但在iOS16后不再支持使用setValue方法設(shè)置設(shè)備的方向，建議替換為UIWindowScene 的requestGeometryUpdate方法。

iOS16之前切換屏幕方法：

///豎屏
[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationUnknown] forKey:@"orientation"];
[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationPortrait] forKey:@"orientation"];
///橫屏
[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationUnknown] forKey:@"orientation"];
[[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationLandscapeLeft] forKey:@"orientation"];

iOS16之后切換屏幕方法:

///豎屏
if (@available(iOS 16.0, *)) {
    [self.navigationController setNeedsUpdateOfSupportedInterfaceOrientations];
    NSArray *array = [[[UIApplication sharedApplication] connectedScenes] allObjects];
    UIWindowScene *ws = (UIWindowScene *)array[0];
    UIWindowSceneGeometryPreferencesIOS *geometryPreferences = [[UIWindowSceneGeometryPreferencesIOS alloc] init];
    geometryPreferences.interfaceOrientations = UIInterfaceOrientationMaskPortrait;
    [ws requestGeometryUpdateWithPreferences:geometryPreferences errorHandler:^(NSError * _Nonnull error) {
         //業(yè)務(wù)代碼
    }];
} else {
    [[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationUnknown] forKey:@"orientation"];
    [[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationPortrait] forKey:@"orientation"];
}
//橫屏
if (@available(iOS 16.0, *)) {
    [self.navigationController setNeedsUpdateOfSupportedInterfaceOrientations];
    NSArray *array = [[[UIApplication sharedApplication] connectedScenes] allObjects];
    UIWindowScene *ws = (UIWindowScene *)array[0];
    UIWindowSceneGeometryPreferencesIOS *geometryPreferences =     [[UIWindowSceneGeometryPreferencesIOS alloc] init];
    geometryPreferences.interfaceOrientations =     UIInterfaceOrientationMaskLandscapeLeft;
    [ws requestGeometryUpdateWithPreferences:geometryPreferences     errorHandler:^(NSError * _Nonnull error) {
         //業(yè)務(wù)代碼
    }];
} else {
    [[UIDevice currentDevice] setValue:[NSNumber   numberWithInteger:UIDeviceOrientationUnknown] forKey:@"orientation"];
    [[UIDevice currentDevice] setValue:[NSNumber numberWithInteger:UIDeviceOrientationLandscapeLeft] forKey:@"orientation"];
}

注意：[self.navigationController setNeedsUpdateOfSupportedInterfaceOrientations];這段代碼，需要寫在在轉(zhuǎn)屏的頁(yè)面合適位置，否則轉(zhuǎn)屏不起作用，導(dǎo)致監(jiān)聽轉(zhuǎn)屏的方法viewWillTransitionToSize: viewWillTransitionToSize未被回調(diào)（自動(dòng)轉(zhuǎn)屏?xí)r也不會(huì)回調(diào)）。