我无法为单个屏幕旋转纵向应用程序

Question

这是我故事板的一部分，我尝试过，但无法处理。

我在 navigationController 中尝试过，但没有成功。你有什么建议吗？

override var shouldAutorotate : Bool {
    if self.topViewController != nil{
        return self.topViewController!.shouldAutorotate
    }else{
        return  super.shouldAutorotate
    }
}

override var supportedInterfaceOrientations : UIInterfaceOrientationMask {
    if self.topViewController != nil{
        return self.topViewController!.supportedInterfaceOrientations
    }else{
        return  super.supportedInterfaceOrientations
    }
}

override var preferredInterfaceOrientationForPresentation: UIInterfaceOrientation{
    if self.topViewController != nil{
        return self.topViewController!.preferredInterfaceOrientationForPresentation
    }else{
        return  super.preferredInterfaceOrientationForPresentation
    }
}

override var preferredStatusBarStyle : UIStatusBarStyle {
    return self.topViewController!.preferredStatusBarStyle
}

Answer 1

您可以将此应用程序生命周期方法 supportedInterfaceOrientationsFor 添加到您的应用程序委托类中，以根据您的要求支持各种方向。

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask {

    if self.window?.rootViewController != nil {

        if self.window!.rootViewController! is UITabBarController {

            if self.window?.rootViewController?.childViewControllers.last is UINavigationController {

                if self.window?.rootViewController?.childViewControllers.last?.childViewControllers.last is YourViewController {
                    return UIInterfaceOrientationMask.all;
                } else {
                    return UIInterfaceOrientationMask.portrait;
                }

            } else {
                if self.window!.rootViewController?.childViewControllers.last is YourViewController {
                    return UIInterfaceOrientationMask.all;
                } else {
                    return UIInterfaceOrientationMask.portrait;
                }
            }                       
        }
    }
}