在起始页面上隐藏UINavigationController [英] Hiding a UINavigationController on start page

问题描述

我有一个NavigationController，它以一个viewController开头，其中viewDidLoad中具有:

Hi I have a navigationController that starts with a view controller in which in viewDidLoad has:

 self.navigationController.navigationBarHidden = YES;

我单击该页面上的一个按钮，它过渡到我放入的第二个视图控制器:

I click a button on that page and it transitions to a second view controller in which I put:

self.navigationController.navigationBarHidden = NO;

在我单击导航栏中的上一步"按钮之前，此方法工作正常.如何将导航栏永久保持在起始页面之外，而不是保持过渡页面呢?

This works fine until I click the Back button in the navigation bar. How do I keep the navigation bar permanently off the start page but not the transitioned one?

推荐答案

在firstViewController的viewWillAppear中添加 self.navigationController.navigationBarHidden = YES; .

Add self.navigationController.navigationBarHidden = YES; in the viewWillAppear of the firstViewController.

您正在在viewDidLoad方法中添加隐藏操作，该方法将被调用一次，因为当您按下nextViewController时，导航堆栈中的viewController不会被卸载.

You are adding hidden action in the viewDidLoad method which is called once as the viewControllers in navigation stack are not unloaded when your push to the nextViewController.

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