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Not quite. In iOS land you have to more explicitly call viewController.dismissViewControllerAnimated(true, completion: nil) if your view controller is a modal or one of the various dismissal methods on UINavigationController if your viewController was pushed on to the screen.
In Swift 3 this function is:
viewController.dismiss(animated: true)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
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