Re: Saving only required files in a file wrapper?
Re: Saving only required files in a file wrapper?
- Subject: Re: Saving only required files in a file wrapper?
- From: Ken Thomases <email@hidden>
- Date: Wed, 7 May 2008 21:36:05 -0500
On May 7, 2008, at 9:06 PM, Graham Cox wrote:
On 8 May 2008, at 10:26 am, Keith Blount wrote:
The trouble with all of these methods is that they tell you not to
rely on fileURL
My interpretation of that advice is that at the time the read... and
write... methods are called, the document hasn't set up -fileURL, so
in that sense you can't rely on it (i.e. don't call -fileURL from
within these methods). But the URL passed to the methods themselves
as a parameter is definitely reliable. So provided you use the
parameter you'll be fine.
I think it means more than that. NSDocument tries to be smart about
atomic writes and backups. The URL passed into the write... methods
is not expected to be the same as the document's current location on
disk. You are to write the document, in whole, to the temporary
location provided to you (about which no assumptions should be made),
and then NSDocument will take care of swapping the newly-written
document with the old document and deleting the old document.
Obviously, this runs directly counter to Keith's desires.
Unfortunately, I don't know how to override these smarts in
NSDocument, other than perhaps what I described earlier with
NSFileWrapper.
-Ken
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