Question

File I/O

Asked by: smithdale87

I'm having trouble reading a text file when I use it's relative path name instead of the absolute path.

(See code Below)

I'm not sure why this is not working, but it is the most annoying thing ever!
What am I doing wrong?

// does not work
NSString *fileContents = [NSString stringWithContentsOfFile:@"myFile.txt" encoding:NSUTF8StringEncoding error:NULL];  
 
 
//works
NSString *fileContents = [NSString stringWithContentsOfFile:@"/Users/myProfile/Desktop/myFile.txt" encoding:NSUTF8StringEncoding error:NULL];

                                  
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Asked On
2008-07-19 at 11:46:37ID23579335
Tags

objective c

,

Cocoa

Topics

Apple Programming

,

Objective-C Programming Language

Participating Experts
1
Points
250
Comments
5

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Answers

 

by: fridomPosted on 2008-07-19 at 12:58:07ID: 22043530

I think it's not clear from where the reading starts. The executable often is in some subdirectory and so if you don't have myFile.txt where the executable is than this file can not be found try to put the file in the same directory as the Objective C executable.

Pleae let me know if that  will do

Regards
Friedrich

 

by: smithdale87Posted on 2008-07-19 at 13:04:18ID: 22043542

Nope, still nothing.

The odd thing is that all my images are loaded with relative path names, and they are all in the same directory as the text file.

For instance the following works correctly
UIImage *image = [UIImage imageNamed:@"myImage.png"];

 

by: smithdale87Posted on 2008-07-19 at 13:16:02ID: 22043565

Also something I just tried...

//does not work
UIImage *image = [UIImage imageWithContentsOfFile:@"myImage.png"];


//works
UIImage *image = [UIImage imageNamed:@"myImage.png"];

 

by: fridomPosted on 2008-07-20 at 01:03:42ID: 22044916

I tried your program like this:


System GNUstep and here's the output

 ./test
2008-07-20 10:03:10.332 test[7043] this is t1.txt

That's correct.

So I can not tell what may go wrong on your machine. 

#include <stdio.h>
#include <Foundation/Foundation.h>
 
int
main(int argc, const char *argv[])
{
  NSAutoreleasePool *pool = [NSAutoreleasePool new]; //  init];
 
  NSString *fileContents = [NSString stringWithContentsOfFile:@"t1.txt"];
  NSLog(fileContents);
 
  [pool release];
 
  return 0;
}
                                              
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by: smithdale87Posted on 2008-07-20 at 15:38:57ID: 22047249

Finally figured it out...

In my project directory I had the following file "aFile.txt".

In order to read from it in my project I had to get it's path as follows:


NSString *path = [[[[NSBundle mainBundle] resourcePath] stringByAppendingString:@"/"] stringByAppendingString:@"aFile.txt"];
                                              
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20120131-EE-VQP-002

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