Re: creating files to write data to?
Re: creating files to write data to?
- Subject: Re: creating files to write data to?
- From: Ken Hawkins <email@hidden>
- Date: Thu, 11 Mar 2004 18:21:00 -0800
thank you thank Ondra! i knew there had to be a better way!
this will do with some teaking of course. the process is assembling a
file with tags (similar to jpeg format0 i might end up having to go
with a Dictionary to hold the data but this is a prototype....
thanks again!
ken;
On Mar 11, 2004, at 3:37 PM, Ondra Cada wrote:
Ken,
On Thursday, Mar 11, 2004, at 23:51 Europe/Prague, Ken Hawkins wrote:
how can i create a 0 length file that i will throughout the processes
of my app write data to. this is mixed string and binary data.
Do you insist on this workflow?
In a vast majority of cases you just write the complete file
atomically, like
NSData *d=... the contents of file computed somehow ...
[d writeToFile:FILENAME atomically:YES];
Nevertheless, you can use NSFileHandle
NSString *fname=...;
[@"" writeToFile:fname atomically:NO]; // create the empty file
NSFileHandle *fh=[NSFileHandle fileHandleForWritingAtPath:fname];
...
[fh writeData:... partial contents of file computed somehow ...]; //
as many times as you want to
...
[fh closeFile];
---
Ondra Hada
OCSoftware: email@hidden http://www.ocs.cz
private email@hidden http://www.ocs.cz/oc
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