view(forKey:)
Returns the specified view involved in the transition.
Declaration
func view(forKey key: UITransitionContextViewKey) -> UIView?Parameters
- key:
The key identifying the view you want. For a list of possible keys, see
View Transition Keys.
Return Value
The view object for the specified key or nil if the view could not be found.
Discussion
The view returned by this method may or may not be the root view of the corresponding view controller. A situation where the views may not be the same is when a system-provided presentation controller installs another view underneath the presented view controller’s view.