如何避免父视图控制器旋转

Question

我有父视图控制器 - 纵向。 我有儿童viewcontroller - 在景观。 当子视图控制器被解除时，父视图控制器仍然在景观中 - 它不应该这样做。请指教：=） 这些是设置： deployment info

我的应用代表

-(UIInterfaceOrientationMask)application:(UIApplication *)application    supportedInterfaceOrientationsForWindow:(UIWindow *)window {
   UIViewController* topVC = [self getTopController];
     if ([topVC isKindOfClass: [childVideoViewController class]]) {
         return UIInterfaceOrientationMaskLandscape;
     }
     return UIInterfaceOrientationMaskPortrait;
}

-(UIViewController*) getTopController{ UIViewController *topViewController =      [UIApplication sharedApplication].keyWindow.rootViewController;

    while (topViewController.presentedViewController) {
        topViewController = topViewController.presentedViewController;
    }
    return topViewController;
}

Answer 1

当您从子视图控制器返回时，您应该打电话 在子视图控制器中创建一个方法并实现此

- (void)setScreenOrientation:(UIInterfaceOrientation)orientation
{
UIDeviceOrientation deviceOrientation = (UIDeviceOrientation) orientation;
[[UIDevice currentDevice] setValue: [NSNumber numberWithInteger: deviceOrientation] forKey:@"orientation"];
}

在解雇前从子视图调用此方法：

    [self setScreenOrientation:UIInterfaceOrientationPortrait];

    [self dismissViewControllerAnimated:YES completion:nil];