使用NSMenuItems在其中创建NSMenu，以编程方式？

问题描述：

首先，我想指出，这个问题可能已经问过了，我找不到任何答案。

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

m以编程方式试图创建一个NSMenu和NSMenuItem到主栏，所以fe。 NSMenu将是文件，然后它将有3x NSMenuItem在其中，新，打开和保存。

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

但没有什么工作，这里是我目前：

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];

但没有什么发生，我很确定我必须告诉应用程序应该使用fileMenu，但是如何做到这一点，如果这不是问题，那么什么是？我对这个东西很新鲜，但对学习感兴趣，所以只要任何提示就会比没有东西更好。

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!

答

要将这三个项目添加到菜单中，请使用：

To add those three items to your menu, use:

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

然后将菜单添加到菜单栏：

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];

每个菜单都有多个菜单项;单个菜单项可以负责子菜单;所有这些菜单都通过 [NSApp mainMenu] 锚定到UI。

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].

使用NSMenuItems在其中创建NSMenu，以编程方式？

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