获取导航中父View的类名

这样推出View：

[[self.navigationController pushViewController:myViewController animated:YES];

怎么样获取推出View（这是子view）的父View控制器的类名？

这样：

NSUInteger numberOfViewControllersOnStack = [self.navigationController.viewControllers count];
UIViewController *parentViewController = self.navigationController.viewControllers[numberOfViewControllersOnStack - 2];
Class parentVCClass = [parentViewController class];
NSString *className = NSStringFromClass(parentVCClass);