UINavigationController堆栈中UIViewControllers的不同界面方向

Question

我有一个纵向方向的rootviewcontroller导航控制器。然后，我想将第二个视图控制器推向横向方向的堆栈。可悲的是，我发现没有办法强制应用程序重新检查supportedInterfaceOrientations。因此，风景视图控制器将显示在照相机中，直到用户将其设备转为风景。

我准备了一个测试项目：https://github.com/buechner/InterfaceOrientationTest

它甚至有可能到navigationcontroller堆内自动改变方向？

Answer 1

这是可以做到，但你将不得不作出UIStoryboardSegue子

1. 使UIStoryBoradSegue子类，并覆盖perform()

   override func perform() { 
   let sourceVC = self.sourceViewController 
   let destonationVC = self.destinationViewController 
   
   sourceVC.navigationController!.presentViewController(destonationVC, animated: true, completion: nil) 
   } 
   

2. 在你NavigationControllerSubclass改变shouldAutoRotate和supportedInterfaceOrientations

   public override func shouldAutorotate() -> Bool { 
   return (self.topViewController?.shouldAutorotate())! 
   } 
   
   
   public override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask { 
   return (self.topViewController?.supportedInterfaceOrientations())! 
   } 
   

3. 而从viewControllers连接Segue公司选择赛格瑞子

4.增加在每类shouldAutorotate和supportedInterfaceOrientations方法

override func shouldAutorotate() -> Bool { 

    return true 
    } 

    override func supportedInterfaceOrientations() -> UIInterfaceOrientationMask { 
    return .Portrait // or landscape in case you want orientation to be landscape 
    } 

1. 正如我们使自定义继续，您还需要添加后退按钮。

开始=>

Answer 2

就能呈现ViewController内LandscapeViewController强行使其landscape

使用下面按照你的LandscapeViewController

func launchLandscapeScreen() -> Void{ 

    let viewController = UIViewController() 
    self.presentViewController(viewController, animated: false, completion: nil) 
    self.dismissViewControllerAnimated(false, completion: nil) 
} 

方法在你 viewDidLoad的 LandscapeViewController

self.performSelector(#selector(LandscapeViewController.launchLandscapeScreen), withObject: nil, afterDelay:1) 

添加代码的行