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Core Data and the Application Delegate
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Core Data and the Application Delegate


  • Subject: Core Data and the Application Delegate
  • From: Jon Gordon <email@hidden>
  • Date: Thu, 23 Apr 2009 20:37:09 -0400

I'm having trouble understanding how to do certain things with the application delegate in a document-based application that uses Core Data. Or maybe I'm understanding things perfectly well, but I don't like the logical conclusion. But I digress.

In a normal (i.e., non-Core Data) document-based application, as I understand it, one can modify certain functions by providing a delegate to the instance of NSApplication. For example, to keep the application from opening a blank document at launch, I can have a delegate that implements applicationShouldOpenUntitledFile: and always returns NO.

But I understand (I think) also that, in a Core Data document-based application, the application delegate is set to one provided by Core Data. And in such cases, providing my own delegate breaks Core Data functionality that I'd otherwise get for free.

Am I right about this? If so, what's the best way to make changes (like not opening the blank document at startup) that would, absent Core Data, be made by providing an application delegate? And where's the best documentation for this?

Thanks,
	-Jon

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