Change height of UINavigationBar - Swift 3

UINavigationBar+Height.swift

import Foundation
import UIKit

private var AssociatedObjectHandle: UInt8 = 0

extension UINavigationBar {
    
    var height: CGFloat {
        get {
            if let h = objc_getAssociatedObject(self, &AssociatedObjectHandle) as? CGFloat {
                return h
            }
            return 0
        }
        set {
            objc_setAssociatedObject(self, &AssociatedObjectHandle, newValue, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN_NONATOMIC)
        }
    }
    
    override open func sizeThatFits(_ size: CGSize) -> CGSize {
        if self.height > 0 {
            return CGSize(width: UIScreen.main.bounds.width, height: self.height)
        }
        return super.sizeThatFits(size)
    }
    
}

Swift 3 version of UINavigationBar+Height.swift

Where should I put "navigationBar.height = someValue"?

Anybody else get this working? I am trying to change the height using -
nav.navigationController?.navigationBar.height = 100.0
but nothing has happened so far.

I have tried all the version of swift as well as objective-C.It worked well till iOS 10 but it is not working in iOS11. When i am going to set the height of navigation bar to 130, it will return the height 96. I don't know why it is so?Any help would be appreciated.

in iOS 11 it won't allow changing the frame of the navigation bar.