On Aug 17, 2008, at 12:07 AM, FTB Accounts wrote:
Here is the current code I am running:
This code has many fundamental errors. I think you need to review the
basics of the C language first, then of Objective-C. You have to walk
before you can run.
You say that you're not getting any errors or warnings when you build
this, but that can't be. You would definitely get warnings for this
code.
/* START CODE */
#import <Cocoa/Cocoa.h>
int main(int argc, char *argv[])
{
NSData *fname = "file:///Users/cknorr/mytest/MYTEST/data.txt";
You are initializing a variable of type NSData* (pointer to NSData).
However, the right-hand side is not an NSData*, it's a C-style string,
which is a character array (char* or char[]). These are not
compatible. It's certainly not meaningful. Any attempt to use the
fname variable as though it were a pointer to an NSData object would
fail, because it doesn't actually contain a valid pointer to an NSData
object.
NSFileHandle *fh=[NSFileHandle fileHandleForWritingAtPath:fname];
Even if fname did contain a valid pointer to an NSData object, the
above would not be correct. The +fileHandleForWritingAtPath: method
of NSFileHandle expects a pointer to an NSString object as its
argument, but that's not what you're providing.
Note that a pointer to a C-style string (character array), which is
what's in fname, is also _not_ a valid pointer to an NSString object.
They are two completely different ways of representing strings and are
not directly interchangeable.
[fh writeData:@"THIS IS A TEST"];
The -writeData: method of NSFileHandle expects a pointer to an NSData
object. However, what you're passing here is a pointer to an NSString
object. Again, this can't work.
[fh closeFile];
return NSApplicationMain(argc, (const char **) argv);
}
Regards,
Ken
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