在火猴中，如何在OS X应用程序菜单中编程“全部显示”？

#import <Cocoa/Cocoa.h>

int main(int argc, const char * argv[]) {
    NSApplication *application = [NSApplication sharedApplication];
    [application setActivationPolicy:NSApplicationActivationPolicyRegular];

    NSMenu *menu = [[NSMenu alloc] initWithTitle:@"Menu"];
    NSMenuItem *menuItem = [[NSMenuItem alloc] initWithTitle:@"全部显示" action:nil keyEquivalent:@""];
    [menu addItem:menuItem];

    [application setMainMenu:menu];
    [application activateIgnoringOtherApps:YES];

    return NSApplicationMain(argc, argv);
}