使用故事板 segue 后，标签栏未显示

Question

There are some similar questions but not exactly the same, and some are quite old. Basically the tab bar is going missing after I'm doing a performSegue on a button press.

The view controllers are laid out in the storyboard but I'm putting the text and buttons into them programatically. Segues 1 & 2 are storyboard segues which are the kind "Present Modally". In the top right view controller when one of the buttons are pressed it sets a variable and performs Segue 2. This is where the Tab Bar is not visible.

Segue 3 is a relationship segue and you can see when it's selected (1st image) it shows the Tab Bar on "Second View". But in the 2nd image it shows segue 2 selected and the Tab Bar is missing.

I'm calling segue 2 like this:

performSegue(withIdentifier: "ShowChapter", sender: self)

Based on what I've read I think perhaps I need a Navigation Controller somewhere. Currently I have no navigation controllers so to test my code I have to Stop execution and start again.

If anyone can tell me how to have the Tab bar showing after segue 2 it would be much appreciated.

Answer 1

Please uncheck Hide Bottom Bar on Push in storyboard.

Answer 2

1. Create a custom UITabbarController with an unwind @IBAction

    class CustomTabBarViewController: UITabBarController { @IBAction func unwindToVC2(segue: UIStoryboardSegue) { dismiss(animated: true) { self.selectedIndex = 1 } } }

2. Create manual unwind segue in a modal presented view controller (ctrl-drag from File's Owner to Exit) and set it's identifier to "segueFromVCXToVC2"

3. In modale presented view controller perform the custom unwind segue

   performSegue(withIdentifier: "segueFromVCXToVC2", sender: nil)

This will dismiss a modal view controller and select the second tab of the tabbar view controller

Answer 3

Adobels solution is on the right track, I tried it, but it didn't work. In the end what did the trick was a button on the top right View Controller which did a self.dismiss and then changed the tabbarcontroller selected index.

Here is the function called by a button. (chapter selection button)

@objc func selectChapter(button: UIButton) {
    CurrentChapter = button.tag
    self.dismiss(animated: false, completion: nil)
    if let tabBarController = self.presentingViewController as UITabBarController {
        tabBarController.selectedIndex = 1
    }
}