iPhone UINavigation 问题 - 嵌套推送动画可能会导致导航栏损坏

iPhone UINavigation 问题 - 嵌套推送动画可能会导致导航栏损坏

import UIKit
class ViewController: UIViewController {
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 创建导航栏
        let navigationController = UINavigationController(rootViewController: self)
        navigationController.navigationBar.barTintColor = .blue
        
        // 创建按钮
        let pushButton = UIButton(type: .system)
        pushButton.setTitle("Push", for: .normal)
        pushButton.addTarget(self, action: #selector(pushButtonTapped), for: .touchUpInside)
        pushButton.frame = CGRect(x: 0, y: 0, width: 100, height: 50)
        pushButton.center = view.center
        view.addSubview(pushButton)
    }
    @objc func pushButtonTapped() {
        let viewController = UIViewController()
        viewController.view.backgroundColor = .white
        navigationController?.pushViewController(viewController, animated: true)
    }
}

@objc func pushButtonTapped() {
    let viewController = UIViewController()
    viewController.view.backgroundColor = .white
    navigationController?.pushViewController(viewController, animated: false)
}