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macoscocoansnotificationcenternsdocument

NSNotificationCenter in document-based app

I'm using NSNotificationCenter to send custom notifications in a document-based app.

A document-based app can have many open documents. Ideally, I would like the the document and its children to receive only the notifications created within the document or its children. In other words, a document should receive only the notifications that the same document generates.

At first I thought I could use the notificationSender parameter of addObserver:selector:name:object: but then I realised that I don't always know which object will send the notification.

Do I have to check if I'm in the right document for every custom notification? Is there a better way to do this?

Solution

  • I think that your approach works if you use the main document as notificationSender argument for both addObserver:selector:name:object: and postNotificationName:object:.