Navigation Controller is not loading ( push , present ) another viewController - ios

Question

I cannot load the viewController on clicking the button, knowing that the defined Vc holds a value of the VC that i want to present.
//AppDelegate
func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
// Override point for customization after application launch.
let mainViewController = UIStoryboard(name: "Main", bundle: nil).instantiateViewController(identifier: "ViewController") as! ViewController
let navVC = UINavigationController.init(rootViewController: mainViewController)
self.window?.rootViewController = navVC
self.window?.makeKeyAndVisible()
return true
}
//ViewController Class
class ViewController: UIViewController, UIScrollViewDelegate {
#IBOutlet weak var collectionView: UICollectionView!
#IBOutlet weak var button: UIButton!
#IBOutlet weak var pageController: UIPageControl!
private let reuseIdentifier = /*"CollectionViewCell"*/ "Cell"
let collectionViewImages : [UIImage] = [#imageLiteral(resourceName: "cooov"), #imageLiteral(resourceName: "shutterstock535739452"), #imageLiteral(resourceName: "portraitYoungManLyingBedCheckingHisFeverThermometer232147948490")]
let collectionViewTexts : [String] = [
"Stay at home ! your health is our Priority",
"Access Latest Coronavirus articles !",
"Check up on your health on a daily basis !"
]
override func viewDidLoad() {
super.viewDidLoad()
renderButton()
renderCell()
pageController.numberOfPages = collectionViewImages.count
pageController.currentPage = 0
}
#IBAction func buttonClicked(_ sender: UIButton) {
let signupVC = UIStoryboard.init(name:"SignUp", bundle: nil).instantiateViewController(withIdentifier: "SignUp")
as! SignUp
self.navigationController?.pushViewController(signupVC, animated: true)
}
}
//SignUp class The VC that should appear on ButtonClick
class SignUp : BaseViewController {
override func viewDidLoad() {
super.viewDidLoad()
}
}
//the class that is inherited by ViewController
class BaseViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
self.navigationController?.navigationBar.isHidden = true
}
}
[enter image description here][1]}
enter image description here
here is a link to the pics provided please check.
https://drive.google.com/drive/folders/1CxysH911PIa3-S9Dx6EUV7DE8vlnEd4l?usp=sharing

Answer 1

Here is the function you can change it like this and let me know the outcome
first run this one
#IBAction func buttonClicked(_ sender: UIButton) {
let signupVC = UIStoryboard.init(name:"SignUp", bundle: nil).instantiateViewController(withIdentifier: "SignUp")
let navVC = UINavigationController.init(rootViewController: signupVC)
// self.present(navVC, animated: true, completion: nil)
if let nav = self.navigationController {
nav.pushViewController(navVC, animated: true)
} else {
print("navigation controller not found")
}
}
And then try to present ... and let me know what happened
#IBAction func buttonClicked(_ sender: UIButton) {
let signupVC = UIStoryboard.init(name:"SignUp", bundle: nil).instantiateViewController(withIdentifier: "SignUp")
let navVC = UINavigationController.init(rootViewController: signupVC)
self.present(navVC, animated: true, completion: nil)
}

Answer 2

You don't need new UINavigation controller to push.
#IBAction func buttonClicked(_ sender: UIButton) {
let signupVC = UIStoryboard.init(name:"SignUp", bundle: nil).instantiateViewController(withIdentifier: "SignUp")
as! SignUp
self.navigationController?.pushViewController(signupVC, animated: true)
}
Also if you are working with iOS 13.0+ and using Xcode 11+, your
SceneDelegate will be called instead of AppDelegate. So try copying the paste to SceneDelegate as well.