Question

I recognize which key user enter in textfield with below code.but i can’t recognize keys like ‘Caps lock’ – ‘shift’ – ‘control’ – ‘command’ – ‘option’ – ‘tab’ how can i recognize them ?

- (void)keyUp:(NSEvent *)theEvent
{
    unichar keyChar = 0;
    keyChar = [theArrow characterAtIndex:0];
    NSString *aci=[NSString stringWithFormat:@"%d",keyChar];
}

Answer 1

Those are modifier keys and they don’t generate NSKeyDown and NSKeyUp events. They generate NSFlagsChanged events. The corresponding NSResponder method is -flagsChanged:.