Autosaving in an NSPersistentDocument
Autosaving in an NSPersistentDocument
- Subject: Autosaving in an NSPersistentDocument
- From: Rick Mann <email@hidden>
- Date: Sat, 19 Jul 2008 11:22:17 -0700
Can someone please explain this part of the NSPersistentDocument docs?
"Although this tutorial does not aim to cover all the possible
features you might implement in an application, some functionality is
omitted due to limitations in NSPersistentDocument itself. Because of
the way Core Data operates, it is not possible to easily support
autosaving in anNSPersistentDocument-based application. Core Data
cannot save to a store and maintain the same changed state in a
managed object context, all while keeping an unsaved stack around as
the current document. For similar reasons, NSPersistentDocument does
not support Save To operations."
http://developer.apple.com/documentation/Cocoa/Conceptual/NSPersistentDocumentTutorial/01_Task/chapter_2_section_4.html#/
/apple_ref/doc/uid/TP40002829-SW5
What do they mean by auto-save?
I seem to be able to save my document (from the app's Save menu item),
and the Undo command is still available. I don't understand how I can
save manually, but it couldn't save automatically, and I don't get the
bit about "all while keeping an unsaved stack around".
TIA,
--
Rick
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