Key/Main NSWindow Responder Chain for multiple NSPanel windows

Question

I have an NSDocument based app which also has a preferences NSPanel window. The preferences panel can then pop an NSFontPanel to configure a default font for my app. Challenge I have is that when the NSFontPanel is displayed, it becomes 'key' - which means the responder chain will direct changeFont: messages to the 'main' window (ie my document NOT my preferences panel)

Anyone know how this scenario should be handled? I guess, what I want is for the changeFont: message to goto the 'topmost non-key window' in this situation. I could do a quick check in my main window to check if preferences panel is visible and pass the message on - but that feels hacky...

Any suggestions would be most welcome!

Answer 1

您可以通过发送changeFont:消息来使用NSNotiFication