问题描述
我有一个NSWindowController的子类。在我的子类中，我有一个keyDown：方法。
I have a subclass of a NSWindowController. In my subclass, I have a keyDown: method.
当我按键盘上的帮助键，我的keyDown：方法不被调用，我想它因为我需要做一些自定义。
When I press the Help Key on the keyboard, my keyDown: method is not called and I would like it to be as I need to do something custom.
现在，当我按帮助键，光标变成一个问号。
Right now, when I press the help key, the cursor changes to a question mark.
任何人都知道如何覆盖帮助键的默认行为？
Anyone know how to override the default behavior of the help key?
推荐答案
已经能够找到是使用NSContextHelpModeDidActivateNotification检测何时进入此模式。
The best solution I've been able to find is to use the NSContextHelpModeDidActivateNotification to detect when this mode is entered.
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(helpContextModeActivated:)
name:NSContextHelpModeDidActivateNotification
object:nil];
调用选择器时，只需调用：
When the selector is called, simply call:
[NSHelpManager setContextHelpModeActive:NO];
取消激活模式并将光标向后移动。
to deactivate the mode and change the cursor back.
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