似乎无法在NSMenuItem上设置setEnabled:NO [英] Cannot seem to setEnabled:NO on NSMenuItem

问题描述

我继承了NSMenu的子类，并通过Interface Builder连接了一堆NSMenuItem.我已经通过调试器进行了测试，以查看它们是否已真正初始化.

I have subclassed NSMenu and connected a bunch of NSMenuItem's via Interface Builder. I have tested via the debugger to see that they really get initialized.

菜单设置为不自动启用项目.仍然，当我将任何我的NSMenuItem设置为[myMenuItem setEnabled:NO]时，它们仍被启用.即使我从NSMenu子类中调用[self update].

The menu is set to not auto enable items. Still when I set any of my NSMenuItem's to [myMenuItem setEnabled:NO] they continue to be enabled. Even if I call [self update] from within the NSMenu subclass.

我想念什么?

推荐答案

我在同事的帮助下解决了这个问题，因此我在这里将其发布给遇到相同问题的其他人.

I solved it with the help of a colleague, so I post it here for others that experience the same issue.

您应将NSMenu-sublass设置为自动启用项(默认行为)，然后在NSMenu-sublass中实现此方法.

You should set your NSMenu-sublass to auto-enable items (default behaviour) and then implement this method in the NSMenu-sublass.

- (BOOL)validateMenuItem:(NSMenuItem *)menuItem {
    return [menuItem isEnabled];
}

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