Weird behavior using keyEquivalent on NSMenuItem

Question

I wanted to be able to set the keyEquivalent of an NSMenuItem based on an NSString, e.g. : CMD+R, ALT+SHIFT+D, etc

For this, I created a method in an NSString category as following (debugging NSLogs included) :

- (NSDictionary*)toKeyEquivalent
{
    NSMutableDictionary* result = [NSMutableDictionary dictionary];

    NSArray* parts = [self componentsSeparatedByString:@"+"];

    NSLog(@"parts :%@",parts);

    if ([[parts objectAtIndex:0] isEqualToString:@""])
    {
        return [NSDictionary dictionaryWithObjectsAndKeys:@"",@"key",[NSNumber numberWithInt:0],@"mask", nil];
    }
    else
    {
        [result setValue:[parts lastObject] forKey:@"key"];

        int mask = 0;

        for (NSString* p in parts)
        {
            if ([p isEqualToString:@"CMD"])
            {
                NSLog(@"cmd");
                mask |= NSCommandKeyMask;
            }
            else if ([p isEqualToString:@"SHIFT"])
            {
                NSLog(@"shift");
                mask |= NSShiftKeyMask;
            }
            else if ([p isEqualToString:@"CTRL"])
            {
                NSLog(@"ctrl");
                mask |= NSControlKeyMask;
            }
            else if ([p isEqualToString:@"ALT"])
            {
                NSLog(@"alt");
                mask = NSAlternateKeyMask;
            }
        }

        [result setValue:[NSNumber numberWithInt:mask] forKey:@"mask"];

        return result;
    }
}

Now, I'm testing that using CMD+R.

The NSLog output is :

2012-04-03 10:36:19.051 App[4654:903] parts :( CMD, R )

2012-04-03 10:36:19.052 App[4654:903] cmd

2012-04-03 10:36:19.052 App[4654:903] keyEq : { key = R; mask = 1048576; } - for Run

Which looks good; mask=1048576 means 1<<20 which is equal to NSCommandKeyMask.

In other words, it SEEMS as if the Key Equivalent (Command-R) has been correctly interpreted.

The weird thing, though, is that when the menu item finally appears, the Key Equivalent appearing next to is "Command-SHIFT-R".... :-S

Why is that? Any ideas?

Answer 1

Did you pass in r or R? I think if you pass it an upper case string, it automatically adds the shift requirement.