`dismiss(animated:completion:)`
> The presenting view controller is responsible for dismissing the view
> controller it presented. If you call this method on the presented view
> controller itself, UIKit asks the presenting view controller to handle
> the dismissal.
()
> view controllerview controller dismiss view controllerUIKitview controller dismiss
_call this method on the presented view
controller **itself**_ _itself_
(view controller).dismiss(...)
(VC`self.dismiss(...)`)
VC`self.dismiss(...)`iOS
`rootViewController``ViewController``dismiss`