Cocoa 应用程序菜单栏不可点击

我正在我的可可应用程序中构建一个菜单栏，其中包含以下代码@implementation我的自定义应用程序CustomApplication:

+(void) setUpMenuBar
{
  [CustomApplication sharedApplication];

  // Main menu
  NSMenu* mainMenu = [NSApp mainMenu];
  if (mainMenu != nil) return; // We set it already
  mainMenu = [[[NSMenu alloc] initWithTitle:@""] autorelease];
  [NSApp setMainMenu:mainMenu];

  // Application menu
  NSMenuItem* appleItem = [mainMenu addItemWithTitle:@""
                                              action:nil
                                       keyEquivalent:@""];

  NSString* appName = @"MyApp";

  NSMenu* appleMenu = [[NSMenu alloc] initWithTitle:@""];

  // Apple menu
  [appleMenu addItemWithTitle:[@"About " stringByAppendingString:appName]
                       action:@selector(orderFrontStandardAboutPanel:)
                keyEquivalent:@""];

  // Quit
  [appleMenu addItemWithTitle:[@"Quit " stringByAppendingString:appName]
                                        action:@selector(terminate:)
                                        keyEquivalent:@"q"];

  [appleItem setSubmenu:[appleMenu autorelease]];
}

启动时，我的应用程序获得焦点，但菜单栏不可点击。 但是，如果我单击窗口并再次单击窗口（将焦点返回到应用程序），它将变得可单击并正常工作。

我错过了什么？

UPDATE

当我创建应用程序时会调用此方法，如下所示。[UPDATE]这就是我开始申请的内容。它实际上是从任何外部的 ocaml 绑定中调用的第一件事@implementation一个类的。

CustomApplicationDelegate* delegate = [CustomApplicationDelegate new];

[CustomApplication sharedApplication];
[NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
[NSApp activateIgnoringOtherApps:YES];

[[NSApplication sharedApplication] setDelegate:delegate];

[CustomApplication setUpMenuBar];

[[CustomApplication sharedApplication] finishLaunching];

好的，感谢@bhaller 的评论，我能够解决我的问题。

实际上，我将电话转接到代表，如下所示。

-(void)applicationWillFinishLaunching:(NSNotification *)aNotification
{
  [CustomApplication sharedApplication];
  [CustomApplication setUpMenuBar];
  [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
}

-(void)applicationDidFinishLaunching:(NSNotification *)notification
{
  [CustomApplication sharedApplication];

  [NSApp activateIgnoringOtherApps:YES];
}