Re: New Tiger NSDocument API's
Re: New Tiger NSDocument API's
- Subject: Re: New Tiger NSDocument API's
- From: Philip Ershler <email@hidden>
- Date: Mon, 13 Jun 2005 10:01:37 -0600
On Jun 12, 2005, at 11:18 PM, j o a r wrote:
On 12 jun 2005, at 21.53, Philip Ershler wrote:
I'm trying to get up to speed with the Tiger NSDocument API's.
I'm just trying to open a stream to my own type of file. Here's
the code I'm trying to use. I am (as the template comments in
MyDocument suggests) overriding readFromFileWrapper:(NSFileWrapper
*)fileWrapper ofType:(NSString *)typeName error:(NSError **)
outError. What I can't figure out is how to get the CFURLRef to
create the CFReadStream. If I set a breakpoint in this method, I
can see the appropriate URL pointing to the file that I chose in
the Open Dialog with the debugger. If there is some sample code or
documentation you can point me to, that would be great. Otherwise
a hint would sure be appreciated.
May I first of all ask what you're trying to do? Could you describe
the type of files you're working with, and anything else about
you're app that might be important for the reading / writing of
documents?
The files I need to read (and ultimately write) are custom format
files that come from a data acquisition system that has been designed
and built in our institute. The files consist of a 1024 byte header
followed by a stream of 16 bit integers. Total files size may run
from several hundred kilobytes to 1 or 2 gigabytes.
Also, why are you using functionality from CF? Do you have a
special reason to not use the Cocoa ("NS") API? Is the file too
large to be read all at once, and in that case, why not use
NSFileHandle?
I was just (perhaps naively) following the suggestion in the
NSDocument template that I got when I started a Cocoa Document based
app.
I appreciate your time and welcome any and all suggestions.
Phil
j o a r
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