Instance Method

childContaining(_:)

Returns the child view controller that contains the source of the unwind segue.

Declaration

func childContaining(_ source: UIStoryboardUnwindSegueSource) -> UIViewController?

Parameters

source

The unwind segue source object containing information about the unwind segue.

Return Value

The view controller that contains the segue source.

Discussion

Container view controllers call this method to identify the child view controller that is the source of the unwind segue. Typically, you call this method from your allowedChildrenForUnwinding(from:) method so that you can remove the corresponding view controller from the returned list of children.

See Also

Performing Segues

func shouldPerformSegue(withIdentifier: String, sender: Any?) -> Bool

Determines whether the segue with the specified identifier should be performed.

func prepare(for: UIStoryboardSegue, sender: Any?)

Notifies the view controller that a segue is about to be performed.

func performSegue(withIdentifier: String, sender: Any?)

Initiates the segue with the specified identifier from the current view controller'€™s storyboard file.

func allowedChildrenForUnwinding(from: UIStoryboardUnwindSegueSource) -> [UIViewController]

Returns an array of child view controllers that should be searched for an unwind segue destination.

func canPerformUnwindSegueAction(Selector, from: UIViewController, sender: Any?) -> Bool

Called on a view controller to determine whether it responds to an unwind action.

Beta
func unwind(for: UIStoryboardSegue, towards: UIViewController)

Called when an unwind segue transitions to a new view controller.