How unwindForSegue:towardsViewController: works?
问题 In my simple app, I have created some controllers with basic segues between them: Yellow controller -> BlueController -> GreenController -> OrangeController . Every of them has its own custom class. From OrangeController I created unwindSegue to my YellowController . It is ok. Within every class I put: override func unwindForSegue(unwindSegue: UIStoryboardSegue, towardsViewController subsequentVC: UIViewController) { print(unwindSegue) print(subsequentVC) } But it was not called at all. Why?