class MyNavigationController: UINavigationController {
    
    override func viewDidLoad() {
        super.viewDidLoad()
        setNavigation()
    }
    //MARK: 重寫跳轉(zhuǎn)
    override func pushViewController(_ viewController: UIViewController, animated: Bool) {
        /// 重新定義push之后的Controller
        if viewControllers.count > 0 {
            UIView.animate(withDuration: 0.5, animations: {
                viewController.hidesBottomBarWhenPushed = true
            })
        }
        let item = UIBarButtonItem(title: " ", style: .plain, target: self, action: nil)
        viewController.navigationItem.backBarButtonItem = item
        super.pushViewController(viewController, animated: animated)
    }
}

extension MyNavigationController {
    
    func setNavigation() {
        UINavigationBar.appearance().isTranslucent = false // 導(dǎo)航欄設(shè)置為不透明
        navigationBar.tintColor = .black // 導(dǎo)航欄文字 顏色
        navigationBar.barTintColor = .white // 導(dǎo)航欄背景設(shè)置為白色
        /// 標(biāo)題顏色/字號(hào)
        let titleTextAttributes = [NSAttributedString.Key.font: UIFont.systemFont(ofSize: 18), NSAttributedString.Key.foregroundColor: UIColor.black]
        if #available(iOS 13.0, *) {
            let _appearance = navigationBar.standardAppearance // UINavigationBarAppearance()
            _appearance.configureWithOpaqueBackground() // 重置背景和陰影顏色
            _appearance.backgroundEffect = nil // 去掉半透明效果
            _appearance.backgroundColor = .white //設(shè)置背景顏色
            _appearance.titleTextAttributes = titleTextAttributes
            _appearance.shadowColor = .clear // 設(shè)置導(dǎo)航欄下邊界分割線透明
            navigationBar.standardAppearance = _appearance //普通樣式
            navigationBar.scrollEdgeAppearance = _appearance //滾動(dòng)樣式
        } else {
            navigationBar.titleTextAttributes = titleTextAttributes // 導(dǎo)航欄文字樣式
            // 設(shè)置導(dǎo)航欄下邊界分割線透明
            navigationBar.subviews.first?.alpha = 0;
            navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
            navigationBar.shadowImage = UIImage()
        }
    }
}