Find out if user pressed the back button in uinavigationcontroller?

Question

When a view loads, i want to see if it\'s because the user pressed the back button. How can i check this?

Answer 1

For the sake of completeness, mix of two most upvoted answers (1, 2) in Swift:

override func willMoveToParentViewController(parent: UIViewController?) {
    super.willMoveToParentViewController(parent)
    if parent == nil {
        // view controller is popping
    }
}