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How to detect Delete key press in Swift?

question macOS swift
Ram Patra Published on August 14, 2020

Delete key press detection is slightly different than other keys. It uses NSDeleteCharacter like below:

event.charactersIgnoringModifiers == String(UnicodeScalar(NSDeleteCharacter)!) 

So, the complete code may look like:

NSEvent.addLocalMonitorForEvents(matching: .keyDown) {
    if self.keyDown(with: $0) {
        return nil // needed to get rid of purr sound
    } else {
        return $0
    }
}

private func keyDown(with event: NSEvent) -> Bool {
    if event.charactersIgnoringModifiers == String(UnicodeScalar(NSDeleteCharacter)!) {
    	print("Delete key presses!")
        return true
    } else {
    	return false
    }
}
Ram Patra Published on August 14, 2020
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