user3497437 user3497437 - 1 year ago 60
iOS Question

Error trying to programmatically add a controller file to a navigation controller without creating storyboard

I am trying to push a view controller onto a navigation controller without designing a storyboard. Is this possible as I am new to Swift? I created my navigation controller in appdelegate.swift file:

let viewController: UIViewController = ViewController(nibName: nil, bundle: nil)
viewController.view.backgroundColor = UIColor.white
let navController: UINavigationController = UINavigationController(rootViewController: viewController)

self.window = UIWindow(frame: UIScreen.main.bounds)
self.window?.backgroundColor = UIColor.darkGray
self.window?.rootViewController = navController

And now in ViewController.swift file, when the user clicks the button below is the file when I try to add the signInController:

func SignIn(sender: UIButton!) {
print("Im, here")
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let controller = storyboard.instantiateViewController(withIdentifier: "signInController") as! signInController
self.navigationController?.pushViewController(controller, animated: true)

Below is my Error:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Storyboard (<UIStoryboard: 0x608000269600>) doesn't contain a view controller with identifier 'signInController''

Do I have to create a storyboard and go to the inspector Id to add the storyboard Id? But what if I wanted to accomplish this without creating a storyboard file?

Answer Source

If you are not using a storyboard then you shouldn't attempt to create your sign-in view controller from a storyboard. Change the code to create the view controller directly:

func SignIn(sender: UIButton!) {
    print("I'm, here")
    let controller = signInController()
    self.navigationController?.pushViewController(controller, animated: true)

BTW - you need to rename everything to follow standard naming conventions. Classnames should start with uppercase letters. All method, variable, and parameters names should start with lowercase letters.