Programmatically go back to previous ViewController in Swift

Question

Swift 3:

If you want to go back to the previous view controller

_ = navigationController?.popViewController(animated: true)

If you want to go back to the root view controller

_ = navigationController?.popToRootViewController(animated: true)

If you are not using a navigation controller then pls use the below code.

self.dismiss(animated: true, completion: nil)

animation value you can set according to your requirement.