swift之navigationController、navigation bar_swift basenavigationcontroller

 // 1.设置导航栏标题属性：设置标题颜色

        self.navigationController?.navigationBar.titleTextAttributes = [NSAttributedStringKey.foregroundColor:UIColor.red]  

// 2.设置导航栏前景色：设置item指示色

        self.navigationController?.navigationBar.tintColor = UIColor.purple

             

// 3.设置导航栏半透明

        self.navigationController?.navigationBar.isTranslucent = true

           

// 4.设置导航栏背景图片

        self.navigationController?.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)//设置导航栏透明，只有当 self.navigationController?.navigationBar.isTranslucent = true时才有效果

self.navigationController?.navigationBar.setBackgroundImage(UIImage.init(named: "bannerhomeOne"), for: UIBarMetrics.default)//设置有图片背景的导航

       

// 5.设置导航栏阴影图片----导航栏底部的那一条黑线

        self.navigationController?.navigationBar.shadowImage = UIImage()

 

 //6.设置导航栏的背景色----如果设置了背景图片，这个就不起作用了

self.navigationController?.navigationBar.barTintColor=UIColor.init(red:39.0/255, green:131.0/255, blue:207.0/255, alpha:1)

导航上右侧按钮：

  func addrightbtn(){

        //navitem search 搜索按钮

            let buttonSearch = UIButton.init(frame: CGRect.init(x: 0, y: 0, width: 20, height: 20))

        buttonSearch.setTitle("设置", for: UIControl.State.normal)

        buttonSearch.addTarget(self, action: #selector(settingbtn), for: UIControl.Event.touchUpInside)

            let barButtonSearch = UIBarButtonItem(customView: buttonSearch)

            //调节按钮位置

        let spacer = UIBarButtonItem.init(barButtonSystemItem: UIBarButtonItem.SystemItem.fixedSpace, target: nil, action: nil)

            spacer.width = -5;

            

            //设置按钮

            self.navigationItem.rightBarButtonItems = [spacer, barButtonSearch]

    }

    @objc func settingbtn(){

        print("设置")

        let mysettingvc = LYBMysettingvc.init()

        navigationController?.pushViewController(mysettingvc, animated: true)

    }

基础导航控制器NAV：

import UIKit
 
class LYBBaseNav: UINavigationController {
 
    override func viewDidLoad() {
        super.viewDidLoad()
 
    }
    
    func configBackBtn() -> [UIBarButtonItem] {
 
         // 返回按钮
 
         let backButton = UIButton(type: .custom)
 
         // 给按钮设置返回箭头图片
 
         backButton.setImage(UIImage(named: "fanhui"), for: .normal)
 
         // 设置frame
 
         backButton.frame = CGRect(x: 200, y: 13, width: 18, height: 18)
 
         backButton.addTarget(self, action: #selector(back), for: .touchUpInside)
 
         // 自定义导航栏的UIBarButtonItem类型的按钮
 
         let backView = UIBarButtonItem(customView: backButton)
 
         // 重要方法，用来调整自定义返回view距离左边的距离
 
         let barButtonItem = UIBarButtonItem(barButtonSystemItem: .fixedSpace, target: nil, action: nil)
 
         barButtonItem.width = -5
 
         // 返回按钮设置成功
 
        return  [barButtonItem, backView]
 
     }
    
    @objc func back(){
        self.popViewController(animated: true)
    }
    
    //拦截跳转事件,每一次push都会调用
    override func pushViewController(_ viewController: UIViewController, animated: Bool) {
    if self.children.count > 0 {
        viewController.hidesBottomBarWhenPushed = true
        //添加返回按钮方式一
        viewController.navigationItem.leftBarButtonItems=self.configBackBtn()
        
    }
    super.pushViewController(viewController, animated: animated)
    }
 
    //返回上一级界面之前的设置操作
  override func popViewController(animated: Bool) -> UIViewController? {
    print("返回");
      //每一次对viewController进行push的时候，会把viewController放入一个栈中
      //每一次对viewController进行pop的时候，会把viewController从栈中移除
      if self.children.count == 2
      {
          //如果viewController栈中存在的ViewController的个数为两个，再返回上一级界面就是根界面了
          //那么要对tabbar进行显示
          let controller:UIViewController = self.children[0]
          controller.hidesBottomBarWhenPushed = false
          
      }
      else
      {
          //如果viewController栈中存在的ViewController的个数超过两个，对要返回到的上一级的界面设置hidesBottomBarWhenPushed = true
          //把tabbar进行隐藏
          let count = self.children.count-2
          let controller = self.children[count]
          controller.hidesBottomBarWhenPushed = true
      }
      
      
      return super.popViewController(animated: false)
  }
}

基础控制器VC：

import UIKit
 
class LYBBaseVC: UIViewController {
 
    override func viewDidLoad() {
        super.viewDidLoad()
//        String.ReachabilitymonitorNet()
//        String.ReachabilityOncemonitorNet()
        self.edgesForExtendedLayout = UIRectEdge.init(rawValue: 0)
        self.view.backgroundColor=UIColor.white
       
        //修改导航栏标题文字颜色
//               self.navigationController?.navigationBar.titleTextAttributes =
//                [.foregroundColor: UIColor.red,.font:UIFont.systemFont(ofSize: 12)]
    }
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        
        //设置导航栏背景透明
//self.navigationController?.navigationBar.setBackgroundImage(UIImage(),for: .default)
//self.navigationController?.navigationBar.shadowImage = UIImage()
    }
    
    //视图将要消失
       override func viewWillDisappear(_ animated: Bool) {
           super.viewWillDisappear(animated)
            
        //重置导航栏背景
//           self.navigationController?.navigationBar.setBackgroundImage(nil, for: .default)
//           self.navigationController?.navigationBar.shadowImage = nil
       }
    
   
}