Swift 4 Unwind segue not working on navigation controller

Question

I am working on an app in Swift 4 and I am trying to unwind a segue. I have a Table View Controller, When the user selects a cell, the segue happens to a navigation controller which has a relationship root view controller with another controller I have UIViewController . In the UIViewController I have a UIButton inside Navigation Items, I have unwind set with the UIButton by selecting the button and dragging to exit and I have the unwind code inside the UITableViewController like so:

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
            if segue.identifier == "segueRSVP" {
            }
        }



    @IBAction override func unwind(for unwindSegue: UIStoryboardSegue, towardsViewController subsequentVC: UIViewController) {
        print("Here")
    }

But nothing happens, it doesn't even get triggered.

Here are my screenshots:

Answer 1

Add this unwind to your RSVP controller:

@IBAction func unwindToThisViewController(segue: UIStoryboardSegue) {
    print("IM BACK")
}

Then control + drag the button in your detail controller up to the exit and select the method: unwindToThisViewController

Just tested this on xcode swift 4 and it should work

I'm not sure why, but when I "overrode" unwind, it didn't work for me either, so I set up my own ibaction

Answer 2

In my case, was tagging the swift unwind func with @objc keyword.

@objc func unwindToThisViewController(segue: UIStoryboardSegue) { ... }

Hope this works.