Question

我有一个应用程序，其中包含横向和纵向的所有视图，但是有两个视图控制器是严格的肖像。

我使用了以下方法，并且在除iPad之外的所有设备中都运行良好。

 func application(application: UIApplication, supportedInterfaceOrientationsForWindow window: UIWindow?) -> UIInterfaceOrientationMask {
    NSLog("Function called")
    if isShouldRotate == true{
        return UIInterfaceOrientationMask.AllButUpsideDown

    }

    return UIInterfaceOrientationMask.Portrait
}

然后我开始了解UINavigationController的子类，但不知道如何实现它。

请让我知道这些步骤。

Answer 1

我通过继承UINavigationController类来解决它！

在App代表中：

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

    var currentViewController: UIViewController? = self.topViewController()
    if currentViewController != nil && currentViewController!.canAutoRotate() {
        return UIInterfaceOrientationMask.All
    }



    return UIInterfaceOrientationMask.Portrait
}

func topViewController() -> UIViewController? {
    if UIApplication.sharedApplication().keyWindow != nil
    {
        return self.topViewControllerWithRootViewController(UIApplication.sharedApplication().keyWindow!.rootViewController!)
    }
    return nil
}

func topViewControllerWithRootViewController(rootViewController: UIViewController?) -> UIViewController? {
    if rootViewController == nil {
        return nil
    }
    if rootViewController!.isKindOfClass(UITabBarController) {
        var tabBarController: UITabBarController = (rootViewController as? UITabBarController)!
        return self.topViewControllerWithRootViewController(tabBarController.selectedViewController)
    }
    else {
        if rootViewController!.isKindOfClass(UINavigationController) {
            var navigationController: UINavigationController = (rootViewController as? UINavigationController)!
            return self.topViewControllerWithRootViewController(navigationController.visibleViewController)
        }
        else {
            if (rootViewController!.presentedViewController != nil) {
                var presentedViewController: UIViewController = rootViewController!.presentedViewController!
                return self.topViewControllerWithRootViewController(presentedViewController)
            }
            else {
                return rootViewController
            }
        }
    }
}

在您不想旋转的特定视图控制器中：

override func canAutoRotate() -> Bool {
    return false
  }

supportedInterfaceOrientationsForWindow未在iPad中调用

1 个答案: