从UITabBarController选项卡根视图中显示UINavigationController

Question

I'd like to present a navigation controller from a tab bar controller's tab's root view controller and have the tabs from the tab bar controller visible.

Here's a photo of an example storyboard:

The tab bar controller has a relationship to the ItemOneViewController , which is implemented like this:

import UIKit

class ItemOneViewController: UIViewController {

  private func presentNavigationController() {

    let id = "NavController"
    guard let vc = storyboard?.instantiateViewController(withIdentifier: id) else { return }

    present(vc, animated: true)
  }

  override func viewDidAppear(_ animated: Bool) {

    super.viewDidAppear(animated)
    presentNavigationController()
  }
}

I hoped that by presenting the navigation controller from the root view controller of a tab on a tab bar controller that the navigation controller would be presented behind the tabs, but when I run the described app, this is what the simulator looks like:

This is what the view hierarchy looks like:

I think I remember a previous colleague mentioning that a UINavigationController will replace the view stack, which makes sense but is there anyway to keep it or bring the UITabBarController with it?

I've tried adjusting the presentation style and context but haven't had any luck.

Answer 1

尝试在导航控制器中嵌入ItemOneViewController，而不是在导航控制器中嵌入ViewController VC。

Answer 2

Select ItemOneViewController from storyboard.

Go to the Editor and Embed with Navigation Controller

Your view hierarchy at Storyboard looks Like this :