Receiver (<Viewcontroller>) Has No Segue with Identifier 'Addsegue'

Initiating segue from error: Receiver has no segue with identifier

You shouldn't call the method like this:

ViewController().successfulLogin(Username: Username)

The above code will init a new instance of ViewController. You should use delegate pattern or completion handler to call the successfulLogin method.

Example of using completion handler:

In ViewController.swift:

@IBAction func loginButton() {
        login(Username: UserNameField.text!, Password: PasswordField.text!) { username in
            self.successfulLogin(Username: username)
        }
    }

In Login.swift:

func login(Username: String, Password: String, completion: @escaping (String) -> Void) {

    var request = URLRequest(url: URL(string: "web address")!)
    request.httpMethod = "POST"
    let postString = "action=login&username=\(Username)&password=\(Password)"
    request.httpBody = postString.data(using: .utf8)
    let task = URLSession.shared.dataTask(with: request) { data, response, error in
        guard let data = data, error == nil else {                                                 // check for fundamental networking error
        print("error=\(error)")
        return
    }

        if let httpStatus = response as? HTTPURLResponse, httpStatus.statusCode != 200 {           // check for http errors
            print("statusCode should be 200, but is \(httpStatus.statusCode)")
            print("response = \(response)")
    }

        let responseString = String(data: data, encoding: .utf8)

        if responseString! == "success" {
            print("Good")

            // Send to new page \\


            completion(Username)
    }



        if responseString! == "fail" {

            print("failed")
            // Alert Error \\


        func alertPopup(title: String, message: String) {

            let alertController = UIAlertController(title: title, message: message, preferredStyle: UIAlertControllerStyle.alert)
            UIApplication.shared.keyWindow?.rootViewController?.present(alertController, animated: true, completion: nil)
            alertController.addAction(UIAlertAction(title: "Try Again", style: UIAlertActionStyle.default, handler:  nil))
            }

            // Add to main Queue \\
            OperationQueue.main.addOperation{
            alertPopup(title: "Error", message: "Invalid Login")
            }
    }


}
task.resume()



}

NSInvalidArgumentException - receiver has no segue with identifier

i fixed it! 1. make sure the right storyboard is selected in Xcode(if you rename the storyboard change it in the project summary). then delete the app on the simulator and restart

Xcode, where to assign the segue identifier

Segue Identifier is not the same as storyboard ID, storyboard ID used when you want to create a View Controller based on that specific storyboard -and it has to be unique, unlike the segue identifier-.

If you already know how to create a segue, you can skip this part.

Adding a segue between two viewControllers:

From the Interface Builder, press the ctrl and drag between the two View Controllers that you want to link (make sure that you are dragging from the view controller itself, not the its main view). You should see:

Choose the "Show" -for instance-, the output should look like this:

As shown above, the arrow that surrounded by the red rectangle is the segue.

Additional note: if you selected the "Show" option, you have to embed your first view Controller in a Navigation Controller (select your first viewController -> Editor -> Embed In -> Navigation Controller), the output should looks like:

Because the "Show" means pushing into a navigation controller stack.

Assigning an identifier for the segue:

Select the segue, from the attribute inspector you'll see "Identifier" text field, that's it! make sure to insert the exact same name that used in performSegueWithIdentifier.

If you don't know where to find the attribute inspector, it is on the top right looks like:

---

Furthermore:

For adding multiple segues from one View Controller, follow the same process (ctrl + drag from the first controller to each other View Controller), the output should looks like:

In this case, you might face the issue how to recognize which segue has been performed, overriding prepare(for:sender:) method is the solution, you can make the checking based on the segue identifier property:

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

which would be the name that you have added to the segue in the storyboard.

Can't make a segue in Side Menu

I found solution here.

Quick answer:

Storyboard have to looks like "Nav Controller -> [Main View Controller] -> (modal) Side Menu Nav Controller -> (embed/root view controller relationship) Table View Controller (with menu options) -> (push) other view controllers"

Thanks for help @Abhishek Jadhav your code works fine!

ObjectiveC Segue between TableView and ViewController

in didSelectRowAtIndexPath:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
    {
        [self performSegueWithIdentifier:@"showDetails" sender:self];
    }

in prepareForSegue:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([segue.identifier isEqualToString:@"showDetails"])
    {
        NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
    ViewController *destViewController = segue.destinationViewController;
    destViewController.details = data [indexPath.row];
    }
}

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