从MainMenu获取特定菜单项

问题描述

我有一个包含窗口的nib（winA.xib）。我的应用程序委托包含一个名为WinAController的NSWindowController子类。

WinAController有一个属性（NSMenu * mainMenu），我要指向MainMenu。我设置它之后我实例化WinAController与这段代码：

  WinAController = [[WinAController alloc] initWithWindowNibName：@WinA ; 
 WinAController.mainMenu = [NSApp mainMenu]; 
 

我在MainMenu的Window顶层菜单项下有一个菜单项，调用[ WinAController showWindow]方法并显示WinA。我想根据WinA是否可见来切换此菜单项的开/关状态。 WinAController也有另一个属性（NSMenuItem * myMenuItem）。

如何获得对窗口顶级菜单项的子菜单的引用。我想获得的子菜单项的标题是命令。我试过这个：

  if（mainMenu！= nil）{
 myMenuItem = [mainMenu itemAtIndex：[mainMenu indexOfItemWithTitle ：@命令]]; 
} 
  

但它似乎不起作用。

我错了什么？

感谢，

：我现在把WinAController放在mainMenu.xib中。我设置WinA（在winA.xib）文件的所有者是WinAController类，但我不知道如何将WinAController的窗口IBOutlet连接到WinA，因为他们在不同的nibs！

哦，没有什么冒险，没有获得。你想做什么，当然是以下：

  @interface MyApplicationDelegate：NSObject {
 IBOutlet NSMenuItem * winAMenuItem; 
} 
 
 @property（assign）IBOutlet NSMenuItem * winAMenuItem; 
 
 @end 
  

然后您可以通过 [[NSApp delegate] winAMenuItem];

I have a nib (winA.xib) that contains a window. My app delegate contains an NSWindowController subclass called WinAController.

WinAController has a property (NSMenu *mainMenu) that I want to point to the MainMenu. I have set it after I instantiate WinAController with this code:

    WinAController = [[WinAController alloc] initWithWindowNibName:@"WinA"];
    WinAController.mainMenu = [NSApp mainMenu];

I have a menu item underneath the "Window" top-level menu item on MainMenu that invokes the [WinAController showWindow] method and displays WinA. I want to toggle the on/off state of this menu item depending on whether WinA is visible or not. WinAController also has another property (NSMenuItem *myMenuItem).

How can I get a reference to a sub menu of the "Window" top-level menu item. The title of sub menu item I want to get is "Command". I have tried this:

    if (mainMenu != nil) {
    myMenuItem = [mainMenu itemAtIndex:[mainMenu indexOfItemWithTitle:@"Command"]];
}

But it doesn't seem to work.

Where am I going wrong?

Thanks,

Edit: I have now placed WinAController in mainMenu.xib. I have set WinA's (in winA.xib) File's Owner to be of class WinAController but I can't figure out how to hook up WinAController's window IBOutlet to WinA as they are in different nibs!

解决方案

I thought I told you to put the Window Controllers in MainMenu.xib?

Oh well, nothing ventured, nothing gained. What you want to do, of course, is the following:

@interface MyApplicationDelegate : NSObject {
  IBOutlet NSMenuItem *winAMenuItem;
}

@property(assign) IBOutlet NSMenuItem *winAMenuItem;

@end

Then you can access this through [[NSApp delegate] winAMenuItem];

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