Re: creating files to write data to?
Re: creating files to write data to?
- Subject: Re: creating files to write data to?
- From: FTB Accounts <email@hidden>
- Date: Fri, 15 Aug 2008 15:10:23 -0700 (PDT)
Devon, thanks for your response. However, your suggestion still does not make the code work. No data is written to the file.
> > /* WRITE DATA TO FILE: THIS IS A TEST */
> > [fh writeData:@"THIS IS A TEST"];
> > [fh closeFile];
I simply was copying the advice given on a previous post. I have tried just about everything and can get nothing to work? has anyone on this list ever had success in writing to a local file, and if so can you show me the code you used?
Thanks,
Seth
--- On Fri, 8/15/08, Devon Ferns <email@hidden> wrote:
> From: Devon Ferns <email@hidden>
> Subject: Re: creating files to write data to?
> To: email@hidden
> Cc: email@hidden
> Date: Friday, August 15, 2008, 2:28 PM
> NSFileHandle writeData takes an NSData pointer not a string
> and that's
> actually not how you do a string, you're missing the @
> in front of it.
>
> <http://developer.apple.com/documentation/Cocoa/Reference/Foundation/Classes/NSFileHandle_Class/Reference/Reference.html#//apple_ref/occ/instm/NSFileHandle/writeData:>
>
> Devon
>
> FTB Accounts wrote:
>
> >
> > /* WRITE DATA TO FILE: THIS IS A TEST */
> > [fh writeData:"THIS IS A TEST"];
> > [fh closeFile];
> >
ORIGINAL MESSAGE:
I saw this post on the list previously.
However I am still unable to write to a file... I have tried everything...
Here is my code for my main.m file. What am I missing?
I am running a Mac OS X 10.4.11 and editing with Xcode 2.2.1
HERE IS MY CODE FOR main.m:
#import <Cocoa/Cocoa.h>
int main(int argc, char *argv[]) {
/* Define what file to write to on local hard drive... */
NSString *fname="/Applications/xampp/xamppfiles/htdocs/data/data.txt";
/* CREAT EMPTY FILE? */
[@"" writeToFile:fname atomically:NO];
NSFileHandle *fh=[NSFileHandle fileHandleForWritingAtPath:fname];
/* WRITE DATA TO FILE: THIS IS A TEST */
[fh writeData:"THIS IS A TEST"];
[fh closeFile];
return NSApplicationMain(argc, (const char **) argv);
}
/* end main.m */
#############################################
Subject: Re: creating files to write data to?
From: Ondra Cada <email@hidden>
Date: Fri, 12 Mar 2004 00:37:49 +0100
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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