How to hide the black line below the Uinavigationbar, Swift version

turn from: http://www.starming.com/index.php?v=index&view=53

First build a Uibarextension.swift file to extend the Uinavigationbar

Import Foundation Import Uikit extension Uinavigationbar {func hidebottomhairline () {Let Navigationbarimag Eview = Hairlineimageviewinnavigationbar (self) navigationbarimageview!. Hidden = true} func Showbottomhairline () {Let Navigationbarimageview = Hairlineimageviewinnavigationbar (self) navigationbarimageview!. Hidden = false} private func Hairlineimageviewinnavigationbar (View:uiview)-> Uiimageview? {if View.iskindofclass (uiimageview) && View.bounds.height <= 1.0 {return (view as UIImage
            View)} Let Subviews = (view.subviews as [UIView]) for Subview:uiview in Subviews { If Let Imageview:uiimageview = Hairlineimageviewinnavigationbar (subview)?

        {return ImageView}} return nil}} extension Uitoolbar {func hidehairline () {Let Navigationbarimageview = Hairlineimagevi
      Ewintoolbar (self)  navigationbarimageview!.
        Hidden = true} func Showhairline () {Let Navigationbarimageview = Hairlineimageviewintoolbar (self) navigationbarimageview!. Hidden = false} private func Hairlineimageviewintoolbar (View:uiview)-> Uiimageview? {if View.iskindofclass (uiimageview) && View.bounds.height <= 1.0 {return (view as UIImage
            View)} Let Subviews = (view.subviews as [UIView]) for Subview:uiview in Subviews { If Let Imageview:uiimageview = Hairlineimageviewintoolbar (subview)?

        {return ImageView}}
 Return nil}}

and use it in the viewdidload.

Let Navigationbar = Self.navigationcontroller? Navigationbar
Navigationbar? Hidebottomhairline ()