第一响应者的麻烦 [英] Trouble with First Responder
问题描述
我在基于文档的应用程序（即Bold，Italic等）中实现一些快捷方式时遇到了一些麻烦：
I've had some trouble implementing some shortcuts in a document based application (i.e. Bold, Italic etc) available here:
问题是所描述的方法将实际的粗体菜单项与字体管理器断开连接，并将其替换为我创建的操作（在本例中为 boldIt ）。因为只能有一个发送动作，所以它被替换，而不是添加。我怎么能克服这个？非常令人沮丧。如果有人可以帮助我，我将非常感激。
The issue is that the method described disconnects the actual 'Bold' menu item from the Font Manager, and replaces it with my action I created (in this case, boldIt). Because there can be only one sent action, it is replaced, not added. How can I overcome this? Very frustrating. If anyone can help me I would greatly appreciate it.
Zach
推荐答案
由于你没有菜单触发两个动作，有两种方法可以解决这个问题：
Since you can't have a menu trigger two actions, there's two good ways to approach this:
1）你的 boldIt：当它完成它的工作时，动作调用 NSFontManager 中的相应方法。这里的缺点是，无论 boldIt：被调用，还需要知道字体管理器。
1) Have your boldIt: action call the appropriate method in the NSFontManager when it's done with it's work. The drawback here is that whatever boldIt: is called on needs to know about the Font Manager as well.
2 ）子类NSFontManager并覆盖 addFontTrait：以在选择粗体时包含所需的行为，然后使用调用超类上的原始方法super addFontTrait：sender] 。
2) Subclass NSFontManager and override addFontTrait: to include your desired behaviour when 'Bold' is selected, and then call the original method on the super class with [super addFontTrait:sender].
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