swift隐藏显示导航栏的底线

//

//  UIBarExtension.swift

//  sinaDemo

//

//  Created by admin on 17/4/21.

//  Copyright © 2017年 super. All rights reserved.

//   为了隐藏导航栏的底线

 

import Foundation

import UIKit

 

extension UINavigationBar {

    // 隐藏线

    func hideBottomHairline() {

        let navigationBarImageView = hairlineImageViewInNavigationBar(view: self)

        navigationBarImageView!.isHidden = true

    }

    

    // 显示线

    func showBottomHairline() {

        let navigationBarImageView = hairlineImageViewInNavigationBar(view: self)

        navigationBarImageView!.isHidden = false

    }

    

    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

    }

}

 

extension UIToolbar {

    

    func hideHairline() {

        let navigationBarImageView = hairlineImageViewInToolbar(view: self)

        navigationBarImageView!.isHidden = true

    }

    

    func showHairline() {

        let navigationBarImageView = hairlineImageViewInToolbar(view: self)

        navigationBarImageView!.isHidden = false

    }

    

    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

    }

}

 

 

// 隐藏调用

  // 为了控制导航栏的状态颜色 和 底线

    override func viewWillAppear(_ animated: Bool) {

        super.viewWillAppear(true)

 

        UIApplication.shared.statusBarStyle = .lightContent

 

        let navigationBar = self.navigationController?.navigationBar

            navigationBar?.hideBottomHairline()

    }

 

 

// 显示调用

   override func viewWillDisappear(_ animated: Bool) {

        let navigationBar = self.navigationController?.navigationBar

            navigationBar?.showBottomHairline()

    }