编辑按钮未显示在UITabBarController的MoreNavigationController中 [英] Edit button not displayed in UITabBarController's MoreNavigationController

问题描述

UITabBarController 正被推入堆栈：

  let presenter = presentViewController as！ UINavigationController 
 let tabvc = UITabBarController（）
 tabvc.viewControllers = vcs 
 tabvc.customizableViewControllers = vcs 
 presenter.pushViewController（tabvc，animated：true）
  

一旦显示，正确显示更多标签按钮，但重新排列标签栏的编辑按钮不会。根据有关MoreNavigationController的

---

推送设计

另一个导航控制器 初始视图控制器，使用其中一个自适应动作Segue：

• 显示


• 自定义

- >否修改按钮，因为它与父<直接冲突 UITableViewController 。

• 显示详细信息


• 目前模仿


• Popover演示文稿

- > 编辑按钮显示为预期。

---

代码

1。程序模式

使用问题中提供的确切代码，更改最后一行：

 让presenter = presentViewController为！ UINavigationController 
 let tabvc = UITabBarController（）
 tabvc.viewControllers = vcs 
 tabvc.customizableViewControllers = vcs 
 presenter.presentViewController（tabvc，animated：true，completion：nil）
  

2。故事板模态

保持 Storyboard 主题，创建一个正确类型的segue，分配一个标识符（即 presentModallySegue ）和上面的5行成为单行：

  self.performSegueWithIdentifier（presentModallySegue，发件人：self）
  

3。 root交换

更激烈的解决方案是在窗口级别交换根视图控制器：

  let tabvc = UITabBarController（）
 tabvc.viewControllers = vcs 
 tabvc.customizableViewControllers = vcs 
 self.view.window！.rootViewController = tabvc 
  

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< h1>结论

更改设计以采用标签栏控制器作为初始视图控制器，或显示标签栏控制器模态。

A UITabBarController is being pushed onto the stack:

let presenter = presentingViewController as! UINavigationController
let tabvc = UITabBarController()
tabvc.viewControllers = vcs
tabvc.customizableViewControllers = vcs
presenter.pushViewController(tabvc, animated: true)

Once presented the more tab button correctly shows, but the edit button to rearrange the tab bars does not. According to the docs on the MoreNavigationController:

The interface for the standard More item includes an Edit button that allows the user to reconfigure the tab bar. By default, the user is allowed to rearrange all items on the tab bar. If you do not want the user to modify some items, though, you can remove the appropriate view controllers from the array in the customizableViewControllers property.

My guess is that the tab bar is not happy being in a navigation controller. Any ideas on bringing the edit button back?

解决方案

You can have both a UINavigationController and a UITabBarController ; using Storyboard helps understand the issue better, any of these solutions will work:

1. Start out with a UITabBarController as initial view controller
2. Use presentViewController instead of pushViewController
3. Use a modal Storyboard segue to perform a modal presentation
4. Swap out the rootViewController dynamically

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Initial View Controller Design

When the Tab Bar Controller is initial View Controller, the Edit button is displayed normally.

---

Pushed Design

Another Navigation Controller is initial View Controller, using one of 5 adaptive Action Segue:

• Show
• Custom

-> No Edit button, since it is in direct conflict with the parent UITableViewController.

• Show Detail
• Present Modally
• Popover Presentation

-> Edit button displayed as expected.

---

Code

1. Program Modal

Using the exact code presented in the question, change the last line:

let presenter = presentingViewController as! UINavigationController
let tabvc = UITabBarController()
tabvc.viewControllers = vcs
tabvc.customizableViewControllers = vcs
presenter.presentViewController(tabvc, animated: true, completion: nil)

2. Storyboard Modal

keeping with the Storyboard theme, create a segue of the correct type, assign an identifier (i.e. presentModallySegue) and the 5 lines above become this single line:

self.performSegueWithIdentifier("presentModallySegue", sender: self)

3. root Swap

A more drastic solution involves swapping out the root view controller at the window level:

let tabvc = UITabBarController()
tabvc.viewControllers = vcs
tabvc.customizableViewControllers = vcs
self.view.window!.rootViewController = tabvc

---

Conclusion

Either change your design to adopt the Tab Bar Controller as the initial View Controller, or present the Tab Bar Controller modally.

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