在iOS6中，将ViewController推入堆栈时强制将ViewController强制为特定

Question

我设置了以下视图控制器：viewController1可以自由旋转到除了人像倒置之外的任何方向。viewController2被推到viewController1的顶部，我希望它与viewController1的方向相同，并且我希望它不能旋转。viewController3被推到viewController2的顶部。我希望viewController3处于纵向模式。我在尝试在iOS6中完成此操作时遇到了很多问题（在iOS5中尚未尝试过）。首先，我已经创建了自己的导航控制器，并将以下内容放入其中：- (UIInterfaceOrientation)preferredInterfaceOrientationForPresentation{    return [self.topViewController preferredInterfaceOrientationForPresentation];}- (NSUInteger)supportedInterfaceOrientations{    return [self.topViewController supportedInterfaceOrientations];}- (BOOL) shouldAutorotate{    return [self.topViewController shouldAutorotate];}我尝试了这些东西的许多不同组合，以了解是否有用。如果vc2是横向的，我主要是在强迫vc3以纵向显示。任何帮助，将不胜感激。

Answer 1

- (NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window

{

if ([self.window.rootViewController.presentedViewController isKindOfClass: [SecondViewController class]])

{

    SecondViewController *secondController = (SecondViewController *) self.window.rootViewController.presentedViewController;

    if (secondController.isPresented)

        return UIInterfaceOrientationMaskAll;

    else return UIInterfaceOrientationMaskPortrait;

}

else return UIInterfaceOrientationMaskPortrait;

}

对于斯威夫特

func application(application: UIApplication, supportedInterfaceOrientationsForWindow window: UIWindow) -> Int {

    if self.window?.rootViewController?.presentedViewController? is SecondViewController {

        let secondController = self.window!.rootViewController.presentedViewController as SecondViewController

        if secondController.isPresented {

            return Int(UIInterfaceOrientationMask.All.toRaw());

        } else {

            return Int(UIInterfaceOrientationMask.Portrait.toRaw());

        }

    } else {

        return Int(UIInterfaceOrientationMask.Portrait.toRaw());

    }

}