Re: Core Data and the Application Delegate
Re: Core Data and the Application Delegate
- Subject: Re: Core Data and the Application Delegate
- From: Jon Gordon <email@hidden>
- Date: Fri, 24 Apr 2009 20:44:20 -0400
I believe it to be so because of some things I found while Googling to
look for the answer. I even found one poster to some list who claimed
that his Core Data app worked perfectly well until he set his own
application delegate, at which point it stopped working perfectly well.
On the other hand, though, I have put
NSLog(@"delegate: %@", [NSApp delegate]);
statements at various points in my code, which is based on the
Document-Based Core Data application template, and it always reports a
null application delegate. So now I'm full-on confused.
Thanks for the reply, though.
-Jon
On Apr 24, 2009, at 3:27 PM, Sean McBride wrote:
On 4/23/09 8:37 PM, Jon Gordon said:
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?
I don't believe so. Why do you believe this? In any case, you can
check yourself by asking NSApplication what its delegate is.
--
____________________________________________________________
Sean McBride, B. Eng email@hidden
Rogue Research www.rogue-research.com
Mac Software Developer Montréal, Québec, Canada
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