ios - dismiss two controllers Swift

Question

I have this situation :

I have a first view controller , when tap on button in it I open in modal mode another view controller , in this view controller when I tap another button I open in modal view another view controller and in it there is a button and when I tap on it I want to go to first view controller without re-initialize it. How do I do it?

Answer 1

This is the perfect situation for an unwind segue.

Put this in your first viewController (the one you want to return to):

@IBAction func backFromVC3(_ segue: UIStoryboardSegue) {
    print("We are back in VC1!")
}

Then in the Storyboard in your 3rd viewController, control-drag from your button to the exit icon at the top of the viewController and choose backFromVC3 from the pop-up.

Now, when the user presses the button in VC3, both VC3 and VC2 will be dismissed and you will return to VC1.

---

If you are not using Storyboards, you can dismiss the viewControllers with code. Here is code for a button's handler to dismiss two levels of viewController:

func doDismiss(_ sender: UIButton) {
    // Use presentingViewController twice to go back two levels and call
    // dismissViewController to dismiss both viewControllers.
    self.presentingViewController?.presentingViewController?.dismiss(animated: true, completion: nil)
}