Macos 单击“关闭”时删除窗口？

我已经创建了一个像这样的附加窗口-

attachedWindow = MAAttachedWindow(view: castedView.view, attachedToPoint: point, inWindow: self.view.window!, onSide: MAPositionBottom , atDistance: 5.0)
attachedWindow!.delegate = self
attachedWindow!.makeKeyAndOrderFront(self)

我用NSWindowDelegate-

        func windowDidResignKey(notification: NSNotification) {
        attachedWindow!.orderOut(self)
}

当我单击除attachedWindow之外的任何位置时，这都很有效，但当我单击此attachedWindow正下方窗口的标准关闭、缩小、缩放按钮时，则不会调用windowDidResignKey。因此，attachedWindow不会被删除，而是停留在屏幕上。我做错了什么？不应单击标准关闭、缩小、缩放按钮，应调用windowDidResignKey