检测活动NSDocument的焦点/不聚焦 [英] Detecting focus/unfocus of active NSDocument

问题描述

是否还有检测NSDocument的焦点/不聚焦？我想动态更新与活动文档相关的菜单项，但我看不到任何直接显而易见的方式。

Is there anyway to detect the focus/unfocus of an NSDocument? I would like to dynamically update a menu item that pertains to the active document but I can't see any immediately obvious way of doing it.

原因是， d喜欢激活，然后在文档焦点上填充菜单，然后在失去焦点时取消填充和停用。

The reason being, I'd like to activate and then populate the menu on document focus, and then unpopulate and deactivate on loss of focus.

任何想法？

感谢，

推荐答案

看起来NSDocument设置为所有文档窗口的委托，因此NSDocument子类中需要的钩子是：

It appears the NSDocument is set as the delegate for all the document windows, and so the hooks required in my NSDocument subclass were:

- (void) windowDidBecomeMain: (NSNotification *) notification
{
    NSLog(@"windowDidBecomeMain:");     
}


- (void) windowDidResignMain: (NSNotification *) notification
{
    NSLog(@"windowWillResign:");        
}


- (void) windowWillClose: (NSNotification *) notification
{
    NSLog(@"windowWillClose:");
}

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