How to turn off keyboard sounds in Cocoa application?

Question

I have a problem with my OpenGL Cocoa application - every time a keyUp / KeyDown event is fired, a system sound is being played... How can I disable this logic for my application?

I have a bad feeling that for some strange reason my application may treat a key press as an error and play system alert sound... Please help!

Have you seen NSSound class references? '- (void)setVolume:(float)volume' — Parag Bafna, Nov 03 '11 at 09:46
That's interesting, however this is not a static method and I can't disable all sounds with it... My application doesn't use Cocoa audio services in any way... — Ryan, Nov 03 '11 at 11:40

Volodymyr B. · Accepted Answer · 2015-07-08T09:57:10.317

5

add to your NSView/NSWindow subclass

- (void)keyDown:(NSEvent *)theEvent {

and make exception on up and down keys, but for other [super keyDown:theEvent];

i think it's may sense

edited Jul 08 '15 at 09:57

answered Nov 07 '11 at 14:09

Volodymyr B.

3,369
2
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This worked for me. Return nil in keyDown when you don't want it to beep. – Paul Slocum Jul 03 '13 at 19:52
When you say add this to NSView, you do mean the file that subclasses NSView, right? – mginn Jun 21 '15 at 16:32

score 4 · Answer 2 · answered Dec 29 '19 at 12:14

For me, the following has turned out to be the optimal solution:

override func awakeFromNib() { 

    // Do your setup here.    

    NSEvent.addLocalMonitorForEvents(matching: .keyDown) {
       if keyDownPressed(with: $0) {
          return nil
       }
       return $0
    }
}

func keyDownPressed(with event: NSEvent) -> Bool {

    print("caught a key down: \(event.keyCode)")

    if event.keyCode == 125 {
        //your code for arrow down here
        return true
    }

    if event.keyCode == 126 {
        //your code for arrow up here
        return true
    }

    return false
}

score 0 · Answer 3 · answered Jun 27 '15 at 07:42

Create a Cocoa Class, subclassing it from NSView
Set it as the class for your View instead of standard greyed-out NSView in storyboard
Add the following to your subclass implementation:

@implementation YourCustomNSView

- (BOOL)acceptsFirstResponder {
    return YES;
}

- (void)keyDown:(NSEvent *)theEvent {

    NSLog (@"keypress %@", theEvent);
//    [super keyDown:theEvent]; // this line triggers system beep error, there's no beep without it
}

@end

arthas · Answer 4 · 2022-05-04T17:35:39.200

0

Swift 5.6 solution

It's caused because of unhandled keydown events in your responder chain.

Make sure some NSView subclass in your responder chain overrides this and returns true.

override performKeyEquivalent(with event: NSEvent) -> Bool {}

edited May 04 '22 at 17:35

answered May 04 '22 at 16:34

arthas

680
1
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How to turn off keyboard sounds in Cocoa application?

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