Creating NSMenu with NSMenuItems in it, programmatically?

First, I'd like to point out that this question is probably already asked, I just couldn't find any answers from them.

So, I'm programmatically trying to create a NSMenu and NSMenuIte开发者_运维问答m to the main bar, so fe. NSMenu would be File and then it would have 3x NSMenuItem in it, New, Open and Save.

But nothing's working, here's what I have currently:

NSMenu *fileMenu = [[NSMenu alloc] initWithTitle:@"File"];
NSMenuItem *newMenu = [[NSMenuItem alloc] initWithTitle:@"New" action:NULL keyEquivalent:@""];
NSMenuItem *openMenu = [[NSMenuItem alloc] initWithTitle:@"Open" action:NULL keyEquivalent:@""];
NSMenuItem *saveMenu = [[NSMenuItem alloc] initWithTitle:@"Save" action:NULL keyEquivalent:@""];
[newMenu setMenu:fileMenu];
[openMenu setMenu:fileMenu];
[saveMenu setMenu:fileMenu];

But nothing happens, I'm pretty sure I have to tell the application that it should use fileMenu, but how do I do that, and if that's not the problem, then what is? I'm pretty new at this stuff, but interested in learning, so just any tip will be better than nothing!

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When you set the menu, you set the menu that appears for that item, not its parent menu.

To add those three items to your menu, use:

[fileMenu addItem: newMenu];
[fileMenu addItem: openMenu];
[fileMenu addItem: saveMenu];

And then to add the menu to the menu bar:

NSMenuItem *fileMenuItem = [[NSMenuItem alloc] initWithTitle: @"File"];
[fileMenuItem setSubmenu: fileMenu]; // was setMenu:
[[NSApp mainMenu] addItem: fileMenuItem];
[fileMenuItem release];

Every menu owns multiple menu items; a single menu item can be responsible for a submenu; and all these menus are anchored to the UI by [NSApp mainMenu].