La barra de navegación de iOS 15 (Navegación) se vuelve blanca (falta la barra de navegación)

prefacio

ambiente

Xcode 13.0  
iOS 15.0  
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El código fuente está colocado en github, si quieres verlo puedes ir directamente al final del artículo

Solución

Principalmente las siguientes dos propiedades (propiedades de UINavigationController)

// 静止样式
self.navigationBar.standardAppearance;
// 滚动样式
self.navigationBar.scrollEdgeAppearance;
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A continuación, solo se muestra el código de procesamiento principal de UINavigationController. Si desea verlo todo, puede ir al final del artículo para descargar el código fuente.

sin grandes titulares

import UIKit

/// 不使用大标题
class TestOneNC: UINavigationController {
    
    override init(rootViewController: UIViewController) {
        super.init(rootViewController: rootViewController)
        print(#function);
        self.xq_init()
    }
    
    override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
        super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
        print(#function);
        self.xq_init()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        print(#function);
        self.xq_init()
    }
    
    func xq_init() {
        print(#function);
        self.navigationBar.prefersLargeTitles = false
        self.navigationBar.barTintColor = .red;
        self.navigationBar.tintColor = .green
        
        let appearance = UINavigationBarAppearance.init()
        appearance.configureWithOpaqueBackground()
        appearance.backgroundColor = UIColor.red
        appearance.shadowImage = UIImage.init()
        appearance.shadowColor = UIColor.clear
        self.navigationBar.standardAppearance = appearance
        self.navigationBar.scrollEdgeAppearance = appearance
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        print(#function);
    }
    
}
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gran titulo usado

import UIKit

/// 使用大标题
class TestNC: UINavigationController {
    
    var appearance_test: UINavigationBarAppearance?
    
    override init(rootViewController: UIViewController) {
        super.init(rootViewController: rootViewController)
        print(#function);
        self.xq_init()
    }
    
    override init(nibName nibNameOrNil: String?, bundle nibBundleOrNil: Bundle?) {
        super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil)
        print(#function);
        self.xq_init()
    }
    
    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        print(#function);
        self.xq_init()
    }
    
    func xq_init() {
        print(#function);
        self.navigationBar.prefersLargeTitles = true
        self.navigationBar.barTintColor = .red;
        self.navigationBar.isTranslucent = true
        self.navigationBar.tintColor = .green
        
        let appearance = UINavigationBarAppearance.init()
        appearance.configureWithOpaqueBackground()
        appearance.backgroundColor = UIColor.red
        appearance.shadowImage = UIImage.init()
        appearance.shadowColor = UIColor.clear
        self.appearance_test = appearance
        // wxq 静止样式
        self.navigationBar.standardAppearance = appearance
    }
    
    override func viewDidLoad() {
        super.viewDidLoad()
        print(#function);
    }
    
    func xq_scrollEdgeAppearance(_ appearance: UINavigationBarAppearance?) {
        // wxq 滚动样式
        self.navigationBar.scrollEdgeAppearance = appearance
    }
    
    override func pushViewController(_ viewController: UIViewController, animated: Bool) {
        print(#function, self.viewControllers);
        if self.viewControllers.count >= 1 {
            viewController.hidesBottomBarWhenPushed = true;
            viewController.navigationItem.largeTitleDisplayMode = .never;
        }
        
        // wxq 第一次设置即可
        if self.viewControllers.count == 1 {
            self.xq_scrollEdgeAppearance(self.appearance_test)
        }
        
        super.pushViewController(viewController, animated: animated)
    }
    
    override func popToRootViewController(animated: Bool) -> [UIViewController]? {
        print(#function, self.viewControllers);
        self.xq_scrollEdgeAppearance(nil)
        return super.popToRootViewController(animated: animated)
    }
    
    override func popViewController(animated: Bool) -> UIViewController? {
        print(#function, self.viewControllers);
        if self.viewControllers.count <= 2 {
            self.xq_scrollEdgeAppearance(nil)
        }
        return super.popViewController(animated: animated)
    }

}

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proyecto

Dirección del proyecto XQNavigationBar15BlankDemo