How to make the page transition after clicking the button [duplicate] - swift

Question

This question already has answers here:
Passing data between view controllers
(45 answers)
Closed 1 year ago.
I'm developing an app to log book that children have read. So I would like to know how to make the page transition back to the menu page after clicking the "save" button. I also want to make the alert that shows "Data has been saved!". Below are my codes.
#IBOutlet weak var newBookSaveButton: UIButton!
#IBAction func newBookTapped(_ sender: Any) {
guard let uid = Auth.auth().currentUser?.uid,
let data = bookData() else {
return
}
db.collection("new reading").document(uid).setData(data)
}
func bookData() -> [String: Any]? {
guard let title = bookTitleTextField.text,
let author = bookAuthorTextField.text,
let summary = bookSummaryTextField.text else {
return nil
}
let data: [String: Any] = [
"bookTitle": title,
"bookAuthor": author,
"bookSummary": summary
]
return data
self.transitionToMenu()
}
func transitionToMenu() {
let MenuViewController = storyboard?.instantiateViewController(withIdentifier: Constants.Storyboard.MenuViewController) as? MenuViewController
view.window?.rootViewController=MenuViewController
view.window?.makeKeyAndVisible()
}
}
With this code, I still unable to transition back to the Menu page. Your help are very much appreciated.

Answer 1

You can use this function:
func transitionToMenu() {
let alert = UIAlertController(title: nil, message: "Data has been saved!", preferredStyle: .alert)
alert.view.alpha = 0.5
alert.view.layer.cornerRadius = 15
self.present(alert, animated: true)
DispatchQueue.main.asyncAfter(deadline: DispatchTime.now() + 2) {
alert.dismiss(animated: true)
if let navController = self.navigationController {
navController.popViewController(animated: true)
} else {
self.dismiss(animated: true, completion: {})
}
}
}