Cannot find "UIScreen" in scope

Question

I've just approached Swift, for building a quick utility app for my MacBook. I have written the following code, but it gives me the error "Cannot find 'UIScreen' in scope".

class AppDelegate: NSObject,NSApplicationDelegate{
    //...
    func applicationDidFinishLaunching(_ notification: Notification) {

        Timer.scheduledTimer(withTimeInterval: 10, repeats: true) { timer in
            UIScreen.mainScreen().brightness = CGFloat(0.0) //<- error here
        }
    }
    //...
}

Initially I thought I've missed an import, but I cannot find what to import (UIKit, is only for iOS). Thank you for any help

I already saw that, butI hoped in a less verbose code, as i thought that UIscreen worked also on macos. Thank you — Francesco Fattori, Jan 13 '22 at 18:18

score 1 · Accepted Answer · edited Jan 14 '22 at 00:51

1

Anything beginning with "UI" is an iOS class. Those classes are not available from a macOS app.

The equivalent class for macOS is probably NSScreen, although I don't think it has an exposed brightness property like the one you are trying to set.

edited Jan 14 '22 at 00:51

Willeke

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answered Jan 13 '22 at 18:00

Duncan C

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Cannot find "UIScreen" in scope

1 Answers1