On Apr 24, 2009, at 8:47 PM, Jon Gordon wrote:
On Apr 24, 2009, at 4:40 PM, Jason Foreman wrote:
On Apr 23, 2009, at 7:37 PM, Jon Gordon wrote:
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.
The Core Data Application Xcode template does create an class that
is hooked up as the application delegate. However you are
certainly free to add code to it or replace it with your own
delegate, as long as your delegate also provides the functionality
that the generated template delegate does (setting up Core Data
stack, etc). The default delegate isn't so much "provided by Core
Data" as it is "an default generated for you by Xcode."
Thanks for the reply. I've seen this information about the existence
of the default delegate elsewhere, but I can't seem to find any
information about the delegate itself. Indeed, whenever I ask NSApp
what the delegate is (by using NSLog and [NSApp delegate]), it
reports that the delegate is null. I've tried searching the docs
and Googling the Web, to no avail. Do you know of any documentation
for this?
I haven't used Core Data, but I see there are two Xcode templates that
give you different things. If you create a "Core Data *Document-
based* Application", no app delegate is created for you. If you
create a "Core Data Application", an app delegate class is created and
you can see the .h and .m files in Xcode. Anything you read about a
delegate being created for you was probably referring to the latter
case.
--Andy
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