objective c - How to reset/blacken a view in iOS -

• i created subview in viewcontroller , set black background while creating.

• after video rendered on , video pauses.

• i want blacken subview time after other video rendered on it.

questions

so thought options achieve either set black image on view or analogous memset in c++ displays whatever background had set. understanding/approach correct ?

i looking @ class reference uiview in apple documentation wasn't able figure out property/method this. how can use-case achived?