Multi window cocoa application

If there are multiple window in an application how do I pass values between them?

My first approach would be to create a NSWindowController for any window, and assign these co开发者_高级运维ntrollers to the Application Delegate.

Am I on the right way? What do you suggest?

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Yes, your technique is fine. If you are creating a document-based application you can also do this in your NSDocument subclass.