iOS Can't dismiss view controller - ios

Question

I have issue with my app. Scenario is simple, after successfully account creation i wan't to dismiss current page or navigate to login page. My storyboard looks like this:
After successful account creation i having a popup with some info about it's ok, we send you verification email and after this popup i want to go to the page second from left - it's my main application page (now called "View Controller").
I tried dismiss window, but i have no effect there, it can only dismiss my popup window.
When i trying to redirect then i have issue with back button when is pressed,it lead to Sign Up page. There is some code:
// Create new user and send verification email
Auth.auth().createUser(withEmail: userEmail, password: userPassword) { user, error in if error == nil && user != nil {
self.sendVerificationMail();
self.displayAlertMessage(alertTitle: "Success", alertMessage: "Your account created successfully. We send you a verification email.");
// Redirect to View Controller
} else {
self.displayAlertMessage(alertTitle: "Unhandled error", alertMessage: "Undefined error #SignUpViewController_0002");
}
}
...
func displayAlertMessage(alertTitle: String, alertMessage:String, alertRedirection:String = ""){
let alert = UIAlertController(title: alertTitle, message: alertMessage, preferredStyle: UIAlertController.Style.alert);
let okAction = UIAlertAction(title:"Ok", style: UIAlertAction.Style.default, handler: nil);
alert.addAction(okAction);
self.present(alert, animated:true, completion:nil);
}
If i add this:
self.view.window!.rootViewController?.dismiss(animated: false, completion: nil)
After alert, it close only alert, before alert, it do nothing ( same as dismiss).

Answer 1

To dismiss and pop to main view you can use alert button action handler.
alert.addAction(UIAlertAction(title: "OK", style: UIAlertAction.Style.default, handler: { (action) in
self.dismiss(animated: true, completion: {
self.navigationController?.popToRootViewController(animated: true)
})
}))
Or you can use the navigation to specific view controller using below lines.
for viewController in self.navigationController!.viewControllers {
if viewController.isKind(of: <Your_Main_ViewController_Class_Name>.self) {
self.navigationController?.popToViewController(viewController, animated: true)
break
}
}
Your_Main_ViewController_Class_Name is the view controller that within your navigation controller stack to which you need to navigate. (ie) main view
To blindly navigate to main view once alert popup displayed, you can use completion handler while present the alert.
self.present(alert, animated: true, completion: {
DispatchQueue.main.asyncAfter(deadline: .now() + 0.01) {
self.navigationController?.popToRootViewController(animated: true)
}
})

Answer 2

well, you are using a navigation controller, for "present" a new view controller, you need to push it, for example.
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let vc = storyboard.instantiateViewControllerWithIdentifier("IDOFYOURVIEW") as CLASS_NAME_OFYOUR_VIEWCONTROLLER
navigationController?.pushViewController(vc, animated: true)
with the last code you can "present" (push) a new view controller
Now, if you want to make a other action when your press backbutton, try with this lines
override func viewDidLoad {
super.viewDidLoad()
self.navigationItem.hidesBackButton = true
let newBackButton = UIBarButtonItem(title: "Back", style: UIBarButtonItemStyle.Bordered, target: self, action: "back:")
self.navigationItem.leftBarButtonItem = newBackButton
}
func back(sender: UIBarButtonItem) {
//in this part you can move to other view controller, examples
// Go back specific view in your navigation controller
for controller in self.navigationController!.viewControllers as Array {
if controller.isKind(of: NAMECLASS_OFYOUR_VIEWCONTROLLER.self) {
_ = self.navigationController!.popToViewController(controller, animated: true)
break
}
}
// Perform your custom actions
// ...
// Go back to the previous ViewController
self.navigationController?.popViewControllerAnimated(true)
}
Regards