iOS:自定义navigation按钮，侧滑功能失效修复

video.swift

//
//  VideoPlayerController.swift
//  AInOne
//
//  Created by Apple on 2021/7/3.
//

import UIKit

class VideoPlayerController: UIViewController {
    // 修复侧滑丢失
    private var navigationDelegate: UIGestureRecognizerDelegate?
    
    override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        
        navigationDelegate = navigationController?.interactivePopGestureRecognizer?.delegate
               navigationController?.interactivePopGestureRecognizer?.delegate = self as? UIGestureRecognizerDelegate
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        navigationController?.interactivePopGestureRecognizer?.delegate = navigationDelegate
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        setupUI()
        // Do any additional setup after loading the view.
    }
}

extension VideoPlayerController {
    func setupUI() {
        let leftItem = UIBarButtonItem(image: UIImage(systemName: "arrow.left"), style: .plain, target: self, action: #selector(back))
        leftItem.tintColor = UIColor.white
        self.navigationItem.leftBarButtonItem = leftItem
    }

    @objc func back() {
        self.navigationController?.popViewController(animated: true)
    }
}