UINavigation Controller from a ViewController

Question

我试图在没有导航的情况下从HomeViewController推送SecondViewController作为导航。然而，在我按下SecondViewController后，转换发生了，但没有显示导航栏。从ViewController执行导航转换的最佳方式是什么？

我对AppDelegate所做的(我对AppDelegate所做的，因为我处理pushNotifications响应(是验证当前控制器是否有导航：

extension UIApplication {

class func getTopViewController(base: UIViewController? = UIApplication.shared.keyWindow?.rootViewController) -> UIViewController? {

if let nav = base as? UINavigationController {
return getTopViewController(base: nav.visibleViewController)

} else if let tab = base as? UITabBarController, let selected = tab.selectedViewController {
return getTopViewController(base: selected)

} else if let presented = base?.presentedViewController {
return getTopViewController(base: presented)
}
return base
}
}

因此，如果导航可用，我会将其返回，然后调用另一个函数：

if let _topVC = UIApplication.getTopViewController(), UserHelper.shared.user.cpf != nil{
_topVC.didAcceptPushNotification()
}

因此，由于ViewController有一个导航，我创建了ViewController的扩展，以设置导航前进方向：

extension UIViewController{
@objc func didAcceptPushNotification() {
DeepLinkManager.shared.checkDeepLink(navigationController: navigationController)
}
}

然后我只说：

let notificationCenterVC = NotificationCentralListViewController(user: UserHelper.shared.user, notificationSpotlightId: nil)
self.navigationController?.pushViewController(notificationCenterVC, sender: self)

但是在VC转换之后没有显示导航栏。我做错了什么

Answer 1

最后我发现了错误。基本上我打电话给self.navigationController?.navigationBar.isHidden = false在按下SecondViewController之前，导航显示：

private func goToCentralDeNotificacoes() {
let notificationCenterVC = NotificationCentralListViewController(user: UserHelper.shared.user, notificationSpotlightId: nil)
self.navigationController?.navigationBar.isHidden = false
self.navigationController?.pushViewController(notificationCenterVC, animated: true)
}