如何在iOS 12.2中更改导航栏高度？

import UIKit

class CustomNavigationBar: UINavigationBar {
    override func sizeThatFits(_ size: CGSize) -> CGSize {
        // 自定义导航栏的高度
        let customHeight: CGFloat = 100.0
        
        var newSize = super.sizeThatFits(size)
        newSize.height = customHeight
        
        return newSize
    }
}

class AppDelegate: UIResponder, UIApplicationDelegate {

    var window: UIWindow?

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        
        // 创建自定义导航栏
        let customNavigationBar = CustomNavigationBar(frame: CGRect(x: 0, y: 0, width: UIScreen.main.bounds.width, height: 100))
        
        // 设置导航栏样式
        customNavigationBar.barTintColor = .blue
        customNavigationBar.titleTextAttributes = [NSAttributedString.Key.foregroundColor: UIColor.white]
        
        // 创建根视图控制器
        let rootViewController = UIViewController()
        rootViewController.view.backgroundColor = .white
        
        // 创建导航控制器
        let navigationController = UINavigationController(rootViewController: rootViewController)
        navigationController.navigationBar.isHidden = true // 隐藏默认导航栏
        navigationController.navigationBar.addSubview(customNavigationBar)
        
        // 设置根视图控制器
        window = UIWindow(frame: UIScreen.main.bounds)
        window?.rootViewController = navigationController
        window?.makeKeyAndVisible()
        
        return true
    }

    // ...
}