被告知何时隐藏 NSStatusItem [英] Being apprised of when NSStatusItem is hidden

问题描述

我有一个使用 NSStatusItem 的应用程序.在小屏幕上，状态栏没有太多空间.当用户切换到具有大量菜单项的应用程序时，我的状态项会被隐藏.有没有办法得到通知?

I have an app which uses an NSStatusItem. On small screens there's not much space in the status bar. When a user switches to an application with a lot of menu items, my status item gets hidden. Is there a way to get notified about this?

到目前为止我尝试过的:

What I tried so far:

• 我检查了是否有任何 NSNotification 被触发:否
• 我检查了 statusView 是否从视图层次结构中删除:否
• 我检查了 isHiddenOrHasHiddenAncestor:否

• I checked if any NSNotification is fired: No
• I checked if the statusView is removed from the view hierarchy: No
• I checked isHiddenOrHasHiddenAncestor: No

这是我用来创建状态项的代码.

Here's the code I use to create the status item.

self.statusItem = [[NSStatusBar systemStatusBar] statusItemWithLength:NSVariableStatusItemLength];
MyStatusView *maView = [[[MyStatusView alloc] initWithFrame:CGRectMake(0, 0, 50, 22)] autorelease];
[statusItem setTitle:@"Ma Status Item"];
[statusItem setView:maView];

推荐答案

你很聪明地意识到，当一个状态项被隐藏时，它的窗口将被移到背景中.

It's pretty smart of you to realize that when a status item is hidden, its window will be moved into the background.

现在您要查找的通知是:NSWindowDidResignKeyNotification(或 NSWindowDidResignMainNotification 取决于您的应用程序的上下文)

Now the notification you're looking for is: NSWindowDidResignKeyNotification (or NSWindowDidResignMainNotification depending on the context of your application)

关于键窗口和主窗口区别的清晰解释，参见这个.

For a clear explanation about the difference between a key window and a main window, see this.

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