导航栏未显示在嵌入式Navigation Controller中

Question

I'm trying to display the navigation bar at the top of the screen, but it's not showing in embed navigation controller.

Here is how it is in the storyboard:

And here it's in the simulator:

As you can see, I created a custom TabBar (following this tutorial ) at the bottom of the screen so I can navigate between the different views.

I believe that I'm going to have to load the navbar programatically because the only solution that I found was to set the navigation controller as the initial view controller, but I already set another view as the initial one so I can't do that.

Answer 1

Issue :

When you instantiate a viewController using storyBoard identifier they wont come with free embedded navigation controller, even if you have added a NavigationController to them. As a result you are adding a viewController without navigation bar to your tab bar VC.

Solutions:

Solution1: If you want each child viewControllers to carry their own navigation controller hence their own navigation stack, provide a storyboard identifier to Navigation Controller behind your child viewControllers and instantiate the Navigation controller itself rather than ViewController. And add NavigationController as you tab bar looking VC's child. Because navigation controller loads the embdedded VC by default you will see your child VC with nav bar.

Solution2: All that you care for is only nav bar than add the Navigation Controller behind the VC containing tab bar looking View.

Hope it helps

Answer 2

Have you tried constraining the navigation bar to your view? Otherwise it can move offscreen.

Answer 3

您需要将标签栏控制器设置为视图的导航控制器-否则，如果将设置直接指向视图，则只是在加载视图时未连接任何导航控制器。