OS X app development, problem with global NSEvents

Question

Cocoa

Good afternoon, colleagues.

Putting together the first application for OS X. Faced a problem.

It is necessary that the program in the background catches the global keystroke ctrl, alt, cmd (hold). Maybe someone came across?

Answer 1

Is it ?
There's an example for ctrl alt cmd + t

I'm posting the code that worked for my case.
I'm adding the global event handler after the app launches. My shortcut makes ctrl+alt+cmd+T open my app.

- (void) applicationWillFinishLaunching:(NSNotification *)aNotification
{
    // Register global key handler, passing a block as a callback function
    [NSEvent addGlobalMonitorForEventsMatchingMask:NSKeyDownMask
                                           handler:^(NSEvent *event){

        // Activate app when pressing cmd+ctrl+alt+T
        if([event modifierFlags] == 1835305 && [[event charactersIgnoringModifiers] compare:@"t"] == 0) {

              [NSApp activateIgnoringOtherApps:YES];
        }
    }];

}