Change the alpha value of the navigation bar

Question

Is this possible?

I want to change the alpha value of the navigation bar in my view controller (in an animation), but if I do self.navigationController.navigat

Answer 1

The most straightforward way of doing this is modifying the alpha component of navigationBar background view, which at this time (iOS9) is a first navigationBar subview. Note however that we never know if the subview hierarchy will be changed by apple in later releases, so gotta be careful.

let navigationBackgroundView = self.navigationController?.navigationBar.subviews.first
navigationBackgroundView?.alpha = 0.7