Dismiss modal from a view in a tab bar view - swift

Question

How can I dismiss a modal view opened from a view in a tab bar view and stays on that view?
I have a tab bar view after login in and there are two views on the tab view (Clients and Profile).
On clients I have a list of clients and I can open another view that shows invoices.
Tapping on an invoice, it shows me the details of a particular invoice.
On this view, there is an actionView with some buttons.
One of those button is "Make Payment".
When tapped on Make Payment, a modal windows is shown.
However, when I tap on a cancel button, it removes all the views and goes back to the login view (initial view)
Invoice View
#IBAction func showActionAlert(_ sender: Any) {
let alertController = UIAlertController(title: nil, message: nil, preferredStyle: .actionSheet)
let payButton = UIAlertAction(title: "Make Payment", style: .default, handler: { (action) -> Void in
let storyboard = UIStoryboard(name: "Main", bundle: nil)
let controller = storyboard.instantiateViewController(withIdentifier: "MakePaymentViewController")
self.present(controller, animated: true, completion: nil)
})
let voidButton = UIAlertAction(title: "Void", style: .destructive, handler: { (action) -> Void in
})
let deleteButton = UIAlertAction(title: "Delete", style: .destructive, handler: { (action) -> Void in
})
let cancelButton = UIAlertAction(title: "Cancel", style: .cancel, handler: { (action) -> Void in })
alertController.addAction(payButton)
alertController.addAction(voidButton)
alertController.addAction(deleteButton)
alertController.addAction(cancelButton)
self.navigationController!.present(alertController, animated: true, completion: nil)
}
Modal View
#IBAction func cancelButton(_ sender: Any) {
let tmpController :UIViewController! = self.presentingViewController;
self.dismiss(animated: false, completion: {()->Void in
tmpController.dismiss(animated: true, completion: nil);
});
}

Answer 1

I changed the cancelButton action and it worked:
#IBAction func cancelButton(_ sender: Any) {
dismiss(animated: true, completion: nil)
}

Answer 2

The controller you're presenting it from is your navigationController in which your navigation stack is.
If you present several viewControllers from your navigationController and then dismiss all the presented Controllers from the parent/presentingViewController(which is navigationController) all viewControllers that are presented on are dismissed.
Instead of presenting it like this :
self.navigationController!.present(alertController, animated: true, completion: nil)
do this
self.present(alertController, animated: true, completion: nil)
And while dismissing do:
self.dismiss(animated: true, completion: nil)