强制控制器在纵向或横向中更改其方向

问题描述：

我有以下控制器，（我已经选择iPad中的所有类型定向模式）

I have following Controllers, (I have selected all types orientation modes in iPad)

这是我的iPad故事板布局

Here is my iPad Storyboard layout

Custom NavigationController > Loading Ctrl > Main Controller.

我的自定义导航包含

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

-(NSUInteger)supportedInterfaceOrientations
{
    return [[self.viewControllers lastObject] supportedInterfaceOrientations];
}

- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation
{
    return [[self.viewControllers lastObject] preferredInterfaceOrientationForPresentation];
}

在我的载入控制器

-(BOOL)shouldAutorotate
{
    return YES;
}

-(NSUInteger)supportedInterfaceOrientations
{
    if (UIUserInterfaceIdiomPad == UI_USER_INTERFACE_IDIOM())
        return UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight;
    else
        return UIInterfaceOrientationMaskPortrait;
}

supportedInterfaceOrientations像往常一样调用，一切似乎都确定，主控制器使用performSegue

The supportedInterfaceOrientations gets called as usual and everything seems ok, But when I push my Main Controller using performSegue

-(NSUInteger)supportedInterfaceOrientations
{
    if (UIUserInterfaceIdiomPad == UI_USER_INTERFACE_IDIOM())
        return UIInterfaceOrientationMaskLandscapeLeft | UIInterfaceOrientationMaskLandscapeRight;
    else
        return UIInterfaceOrientationMaskPortrait;
}

在MainController中不再调用。为什么呢？

No more calls in MainController. Why is that?

答

有一个窍门。

从应用程序获取状态栏并旋转它。

Fetch the status bar from the Application and rotate it.

[[UIApplication sharedApplication] setStatusBarOrientation:UIInterfaceOrientationPortrait animated:YES];

以模式方式创建并显示和关闭空视图控制器。

Create and display and dismiss an empty view controller modally.

UIViewController *mVC = [[UIViewController alloc] init];
[self presentModalViewController:mVC animated:NO];
[self dismissModalViewControllerAnimated:NO];

现在您的设备已被强制旋转。您现在可以切换到适当的视图控制器或使用导航控制器推一个。

Now your device shoud have been forced to rotate. You could now segue to a proper view controller or push one using the navigation controller.

强制控制器在纵向或横向中更改其方向

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