Swift 隐藏NavigationBar 和 toolbar 下面的黑线

Swift 隐藏NavigationBar 和 toolbar 下面的黑线

在 基类控制器（BaseViewController）中 定义方法
直接上代码：

//MARK: - 隐藏NavigationBar下面的黑线public func hideNavBottomHairline(hide: Bool) {let navigationBarImageView = hairlineImageViewInNavigationBar(view: self.navigationController!.navigationBar)navigationBarImageView?.isHidden = hide}private func hairlineImageViewInNavigationBar(view: UIView) -> UIImageView? {if view.isKind(of: UIImageView.self) && view.bounds.height <= 1.0 {return (view as! UIImageView)}let subviews = (view.subviews as [UIView])for subview: UIView in subviews {if let imageView: UIImageView = hairlineImageViewInNavigationBar(view: subview) {return imageView}}return nil}

//MARK: - 隐藏toolbar下面的黑线public func hideHairlineInToolbar(hide: Bool) {let toolbarHairlineImageView = hairlineImageViewInToolbar(view: self.tabBarController!.tabBar)toolbarHairlineImageView?.isHidden = hide}private func hairlineImageViewInToolbar(view: UIView) -> UIImageView? {if view.isKind(of: UIImageView.self) && view.bounds.height <= 1.0 {return (view as! UIImageView)}let subviews = (view.subviews as [UIView])for subview: UIView in subviews {if let imageView: UIImageView = hairlineImageViewInToolbar(view: subview) {return imageView}}return nil}

//MARK: - viewWillAppearoverride func viewWillAppear(_ animated: Bool) {super.viewWillAppear(animated)//调用//隐藏NavigationBar下面的黑线super.hideNavBottomHairline(hide: true)}