That tweet doesn’t mention what API that is, and Google doesn’t give it to me. The best I can find (via https://stackoverflow.com/questions/18680028/prevent-sc

That tweet doesn’t mention what API that is, and Google doesn’t give it to me. The best I can find (via https://stackoverflow.com/questions/18680028/prevent-screen-capture-in-an-ios-app https://stackoverflow.com/questions/18680028/prevent-screen-...) is https://developer.apple.com/documentation/uikit/uitextinputtraits/1624427-issecuretextentry https://developer.apple.com/documentation/uikit/uitextinputt...: “A Boolean value that indicates whether a text object disables copying, and in some cases, prevents recording/broadcasting and also hides the text“ ⇒ People seem to creatively use this to hide views shown behind text views from screenshots. I wonder what those “in some cases” are, though.