How to Segue Values When My Viewcontroller Is Embedded in an Uinavigationcontroller

How do I segue values when my ViewController is embedded in an UINavigationController?

casting it as ViewController is working fine for me.

var dest = segue.destinationViewController as! ViewController

And your segue connection should be :

Passing Data between view Controllers Using a segue from a view embedded in a navigation controller to a tabbarcontroller

This is my view controller where you can check that I am sending 5 to tabbar first viewcontroller:

   class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        self.performSegue(withIdentifier: "segueIdentifier", sender: self)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

    // MARK: - Navigation

    // In a storyboard-based application, you will often want to do a little preparation before navigation
    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
        let barViewControllers = segue.destination as! UITabBarController
        let destinationNv = barViewControllers.viewControllers?[0] as! UINavigationController
        let destinationViewController = destinationNv.viewControllers[0] as! FirstViewController
        destinationViewController.currentBalance = 5
    }
}

Now You can check my firstview controller where you can check that what value we are getting.

class FirstViewController: UIViewController {

    var currentBalance = 0
    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        print(currentBalance)
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }

}

Now, You can check my console and storyboard:

Embed a UIViewController in a NavigationController using segues

In your Storyboard, you can embed a ViewController in a Navigation Controller by selecting the View Controller and then picking from the menu at the top Editor->Embed In->Navigation Controller. From another view controller, you control drag to this Navigation controller to set up the modal segue. You can also control drag to the original View Controller to set up segues to it without the Navigation Controller.

How to pass variable to a ViewController that is embedded in a Navigation Controller?

You can pass the value by overriding the prepare(for segue:) function in ViewController1

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

    // Get the new view controller using segue.destination 
    guard let destination = segue.destination as? UINavigationController else {
        return
    }

    guard let finalDestination = destination.viewControllers.first as? ViewController2 else {
        return
    }

    finalDestination.testID = "Test Value"
}

Segue from one view controller embedded within UINavigationController to another UINavigationController

Push segue occurs only within one navigation controller. It's how it implements 'show' type segue. Making 'show' segue from navigation controller to another navigation controller is not what Xcode drawing tool considered as 'pushing'. It interprets it as popover by default.

Pass data to View Controller embedded inside a Container View Controller

Actually I feel like the correct solution is to rely on programmatic instantiation of the content view, and this is what I chose after careful and thorough thoughts.

Here are the steps that I followed:

• The Table View Controller has a push segue set to ContainerViewController in the storyboard. It still gets performed when the user taps on a cell.

• I removed the embed segue from the Container View to the ContentViewController in the storyboard, and I added an IB Outlet to that Container View in my class.

• I set a storyboard ID to the Content View Controller, say… ContentViewController, so that we can instantiate it programmatically in due time.

• I implemented a custom Container View Controller, as described in Apple's View Controller Programming Guide. Now my ContainerViewController.swift looks like (most of the code install and removes the layout constraints):

  class ContainerViewController: UIViewController {
  
      var contentViewController: UIViewController? {
          willSet {
              setContentViewController(newValue)
          }
      }
  
      @IBOutlet private weak var containerView: UIView!
      private var constraints = [NSLayoutConstraint]()
  
      override func viewDidLoad() {
          super.viewDidLoad()
          setContentViewController(contentViewController)
      }
  
      private func setContentViewController(newContentViewController: UIViewController?) {
          guard isViewLoaded() else { return }
          if let previousContentViewController = contentViewController {
              previousContentViewController.willMoveToParentViewController(nil)
              containerView.removeConstraints(constraints)
              previousContentViewController.view.removeFromSuperview()
              previousContentViewController.removeFromParentViewController()
          }
          if let newContentViewController = newContentViewController {
              let newView = newContentViewController.view
              addChildViewController(newContentViewController)
              containerView.addSubview(newView)
              newView.frame = containerView.bounds
              constraints.append(newView.leadingAnchor.constraintEqualToAnchor(containerView.leadingAnchor))
              constraints.append(newView.topAnchor.constraintEqualToAnchor(containerView.topAnchor))
              constraints.append(newView.trailingAnchor.constraintEqualToAnchor(containerView.trailingAnchor))
              constraints.append(newView.bottomAnchor.constraintEqualToAnchor(containerView.bottomAnchor))
              constraints.forEach { $0.active = true }
              newContentViewController.didMoveToParentViewController(self)
          }
      } }
  

• In my LetterTableViewController class, I instantiate and setup my Content View Controller, which is added to the Container's child view controllers. Here is the code:

  override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
      if let containerViewController = segue.destinationViewController as? ContainerViewController {
          let indexPath = tableView.indexPathForCell(sender as! UITableViewCell)!
          let letter = letterForIndexPath(indexPath)
          containerViewController.navigationItem.title = "Introducing \(letter)"
          if let viewController = storyboard?.instantiateViewControllerWithIdentifier("ContentViewController"),
             let contentViewController = viewController as? ContentViewController {
              contentViewController.letter = letter
              containerViewController.contentViewController = contentViewController
          }
      }
  }
  

This works perfectly, with an entirely content-agnostic container view controller. By the way, it used to be the way one instantiated a UITabBarController or a UINavigationController along with its children, in the appDidFinishLaunching:withOptions: delegate method.

The only downside of this I can see: the UI flow ne longer appears explicitly on the storyboard.

Passing data with segue through navigationController

The destination view controller of the segue is the UINavigationController. You need to ask it for its top view controller to get to the real destination view controller:

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    if segue.identifier == "showItemSegue" {
        let navController = segue.destination as! UINavigationController
        let detailController = navController.topViewController as! ShowItemViewController
        detailController.currentId = nextId!
    }
}

SWIFT 3: Segue with navigation controller

For the first Problem, When using embedded in navigation controller you have don't have to create action function when the button is tapped. Navigation controller does it for you. So things you need to do :

1. Disconnect the function btnTapped from the button using storyBoard.
2. Delete or comment the function btnTapped(You don't need it).

accessing the UInavigationcontroller embedded view controller?

you need to do like

Step-1

Create the custom class of NavigationController , for example NavigationViewController (SubClass of UINavigationController).

Step-2

Assign the class name for that NavigationController in Identity Inspector.

Step-3

Set the Storyboard ID for that class in Identity Inspector Xcode.

Step-4

Finally access the class via Code, for example

UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"Main"
                                                         bundle: nil];

NavigationViewController *controller =(NavigationViewController *)[mainStoryboard instantiateViewControllerWithIdentifier:@"navigate"];
NSLog(@"%@",[controller topViewController]);

[appdelegate.window setRootViewController:controller];

for example

How to embed a UINavigationController in prepareForSegue?

The segue you're intersecting is to your VC2, not a navigation controller. You're going to need to update the "AddSegue" segue to point to a navigation controller, then link your VC2 as the root view controller of the navigation controller.

If you post your storyboard, I can give you more details on how to do this.

EDIT: Here's how you should set up your storyboard. It might get a bit weird, since VC2 has two parent navigation controllers, but it should be fine.

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