Present view controller and allow user to swipe back - ios

Question

Currently, I'm presenting a new view controller like this:
let mainStoryboard = UIStoryboard(name: "Main", bundle: Bundle.main)
if let viewController = mainStoryboard.instantiateViewController(withIdentifier: "MyViewController") as? MyViewController {
// Present fullscreen
viewController.modalPresentationStyle = .fullScreen
self.present(viewController, animated: true, completion: nil)
}
However, this doesn't let me swipe from the left to go back to the previous controller. How can I enable this behaviour?
Update
Here is my code now:
#objc func onNextButtonTapped(sender: UITapGestureRecognizer) {
let mainStoryboard = UIStoryboard(name: "Main", bundle: Bundle.main)
if let viewController = mainStoryboard.instantiateViewController(withIdentifier: "MyViewController") as? MyViewController {
self.navigationController?.pushViewController(viewController, animated:true)
}
}

Answer 1

You need to push view controller to the navigational stack for that behaviour.
let mainStoryboard = UIStoryboard(name: "Main", bundle: Bundle.main)
if let viewController = mainStoryboard.instantiateViewController(withIdentifier: "MyViewController") as? MyViewController {
navigationController?.pushViewController(viewController, animated: true)
}
For this to work the view controller that you're putting this code in must be embedded in a UINavigationController. For embedding the view controller into a navigation controller make sure the selected view controller does have the class that your code is contained in.
And after embedding it should look like this: