Set UINavigationBar appearance whenContainedInInstancesOf to my viewcontroller not working

Question

I want to set white barTintColor in some viewcontroller I have set UINavigationBar.appearance().barTintColor for all default color but when I use appearance whenContainedInInstancesOf It's not change my viewcontroller

UINavigationBar.appearance(whenContainedInInstancesOf: [MyViewController.self]).barTintColor = .white

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Any idea?. I tried this in my viewcontroller

self.navigationcontroller.navigationbar.barTintColor = .white

but I have to set color back to default when screen will disappear. I don't want to do like that. How can I do?

Answer 1

UINavigationBar is contained in a UINavigationController not UIViewController

with that said you need to create a custom UINavigationController

an empty class will do the job

class NavigationController: UINavigationController {}

then we can use it

UINavigationBar.appearance(whenContainedInInstancesOf: [NavigationController.self]).barTintColor = .white

Example can be found here