You should be able to do the self. NavigationController.navigationBar. TintColor = UIColor blackColor in viewWillAppear or viewDidAppear.
The reason is that the navigationController is shared. So, when you change its color to Blue, you have to change it back to Black.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.