How to hide status bar of a single view controller in iOS 9?

Question

In a ViewController, which I presented modally, I did this:

override func prefersStatusBarHidden() -> Bool {
    return true
}

This used

Answer 1

UIApplication.sharedApplication().setStatusBarHidden(true, withAnimation: .None) 

and when you want it back in a separate VC:

UIApplication.sharedApplication().setStatusBarHidden(false, withAnimation: .None)