Back button missing after segue

Question

So, in this scenario...

• I have three storyboards (A, B, and C).
• C is a common storyboard that both A and B at some point segue to with a storyboard reference.
• Storyboard A and B are both UITableViews with a list of news articles.
• When you click on one of the UITableViewCells, it will segue to Storyboard C.
• In Storyboard C, I want to be able to go back to where I came from (A or B). So, I added a Navigation bar to Storyboard C and added a back button.
• In the UINavigationItem in Storyboard C, I set the Back Button value to Back.

When I build and run, the navigation bar is there in Storyboard C, but no back button in the navigation bar in Storyboard C. In Storyboard A and B, I even put those UITableViews inside a Navigation Controller thinking that to include a back bar, it needs to have come from a navigation controller first, and that didn't work.

When I go to the outlets page of the UINavigationItem, this is what it looks like:

How do I add the back button to Storyboard C?

FYI I'm not that experienced of an iOS developer, so there may be some obvious things that I'm not aware of.

EDIT: I use a show segue for both A-->C and B-->C segues.

Answer 1

You should setup your views like this:

• View A (Table View) ... Embed Navigation Controller For View A
• View B (Table View) ... Embed Navigation Controller For View B
• View C (Normal View) .... Do Not Embed Navigation Controller For View C
• Create Segue from view A -> View C

• Create Segue from view B -> View C

  You can see that, after you create Segue to View C, In View C will appear the navigation bar automatically because you just need to embed navigation controller for the root view (in this case is View A and View C)

This is how you can Embed Navigation Controller to a View Controller

After you do like I said. You will get the story board like this:

That's how you need to setup your story board.

So now you have 2 branch of navigation

1. View A -> View C (Root is View A)
2. View B -> View C (Root is View B)

Hope it helps you

Answer 2

• If you're pushing a ViewController "C" on navigation stack then you need to pop that controller on back button tap.

  pushing

  self.navigationController?.pushViewController(ViewControllerC, animated: true)

  poping

  self.navigationController?.popViewController(animated: true)

• If you're presenting a ViewController "C" then you need to dismiss that controller on back button tap.

  presenting

  self.presentViewController(ViewControllerC, animated:true, completion:nil)

  dismissing

  self.dismissViewControllerAnimated(false, completion: nil)

EDIT

you need to add this code like

When going from A -> C, you need to add this in didSelectRowAtIndexPath method of tableview (on tap of cell), ignore if you are using segue

self.navigationController?.pushViewController(ViewControllerC, animated: true)

When coming back from C -> A, you need to implement bar button action method like this in "C"

in viewDidLoad() method of view controller "C", add bar button programatically

let backBtn = UIButton(type: .custom)
backBtn.setImage(UIImage(named: "imagename"), for: .normal)
backBtn.frame = CGRect(x: 0, y: 0, width: 30, height: 30)
backBtn.addTarget(self, action: #selector(ViewControllerC.back), for: .touchUpInside)
let item2 = UIBarButtonItem(customView: backBtn) 

func back(sender: UIButton){
  self.navigationController?.popViewController(animated: true)
}

The same way you can do for View controller B also.

Answer 3

I think your navigation bar gets hidden when come back from another storyboard. In that case you have to show your navigation bar forcefully. In your first view controller in storyboard C. Try the following code:

- (void) viewWillAppear:(BOOL)animated
 {
     [self.navigationController setNavigationBarHidden:NO animated:animated];
     [super viewWillAppear:animated];
 }

swift3

override func viewWillAppear(_ animated: Bool) {
self.navigationController?.setNavigationBarHidden(false, animated: animated)
super.viewWillAppear(animated)
}