Programmatically go back to previous ViewController in Swift

Question

I send the user over to a page on a button click. This page is a UITableViewController.

Now if the user taps on a cell, I would like to push him ba

Answer 1

Swift 3, Swift 4

if movetoroot { 
    navigationController?.popToRootViewController(animated: true)
} else {
    navigationController?.popViewController(animated: true)
}

navigationController is optional because there might not be one.