iOS 系统导航与自定义导航衔接与动画

1首先写一个BaseNavigationController

import UIKit

class BaseNavigationController: UINavigationController, UIGestureRecognizerDelegate {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        self.interactivePopGestureRecognizer?.delegate = self
    }
    
    func gestureRecognizerShouldBegin(_ gestureRecognizer: UIGestureRecognizer) -> Bool {
            if self.viewControllers.count == 1{
                return false;
            }
            return true;
    }
    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */

}

2 写一个父类

import UIKit

class YQBaseViewController: UIViewController {
    func isHiddenNav() -> Bool {
        return false
    }
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }
    
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated);
//            self.navigationController?.setNavigationBarHidden(true, animated: true)
        self.navigationController?.setNavigationBarHidden(self.isHiddenNav(), animated: animated)

    }
    
//    override func viewWillDisappear(_ animated: Bool) {
//        super.viewWillDisappear(animated);
//        self.navigationController?.navigationBar.isHidden = false;
//    }
  
    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */

}

2 FirstVC

class FirstViewController: YQBaseViewController {
    override func isHiddenNav() -> Bool {
        return true
    }
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
    }
    @IBAction func btnClick(_ sender: Any) {
        let toVC = SecondViewController.init()
        
        self.navigationController?.pushViewController(toVC, animated: true)
    }
    

    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */

}

3 Second

import UIKit

class SecondViewController: YQBaseViewController {
    
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        self.title = "系统导航"
    }


    /*
    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        // Get the new view controller using segue.destination.
        // Pass the selected object to the new view controller.
    }
    */

}

ViewController

import UIKit

class ViewController: YQBaseViewController {


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.

        self.title = "系统导航"
    }

    @IBAction func tbClick(_ sender: Any?) {
        
        let toVC = FirstViewController.init()
        self.navigationController?.pushViewController(toVC, animated: true)
        
    }
}

Simulator Screen Recording - iPhone 12 - 2021-05-26 at 11.26.24.gif

效果如图