How can I change different UINavigationBar Style in a UINavigationController?

I want to change the color and translucent of the UINavigationBar in one viewController without influence on other viewControllers. It seems impossible because they share a common UINavigationBar. Some similar questions tell me to change the style of UINavigationBar in viewWillAppear and restore it in viewWillDisappear.But I can see the effect is not perfect. I want to know how can the follow app can do this. It seems it does not share a common UINavigationBar