NSFileHandle Issue creating a file

[zer0]

Hi,

I have search google on how to append text to a file and got that working but it only works if the file is already created.

heres a section of my code

NSFileHandle *fh = [NSFileHandle fileHandleForWritingAtPath:@"/Users/ahug4122/RSItemDataLog.txt"];
	[fh seekToEndOfFile];
	
	for (int i = 0; i < [items count]; i++)
	{
		RunescapeItem *rsi = [items objectAtIndex:i];
		NSString *str = [[NSString alloc] initWithFormat:@"\n%@:%@", [rsi name], [rsi price]];
		NSData *data = [str dataUsingEncoding:NSASCIIStringEncoding];
		[fh writeData:data];
		[str release];
		
	}

Now that code works great but only if the file is there. I couldn't find how to create a file before adding data into it, in the API documentation.

and should i release the data object in that loop as well, kinda new to the whole memory management?

[FlyingDiver]

The NSFileHandle class description does say:

Return Value

The initialized file handle, or nil if no file exists at path.

I think you need to use NSFileManager to check for the existence of the file, and create it if needed.

joe

[zer0]

I have done that check now but the NSFileHandler documentation doesn't show how to create the file if its not there, only how to create a file desciptor.

...Zer0...

[FlyingDiver]

Originally Posted by zer0

I have done that check now but the NSFileHandler documentation doesn't show how to create the file if its not there, only how to create a file desciptor.

...Zer0...

[NSFileManager createFileAtPath: blah contents: blahblah attributes: morerblah];

joe

[zer0]

Thanks Joe,

I will look at the rest of the api for NSFileManager later.

...Zer0...

[85joshua@gmail.com]

NSFileHandle *fh = [NSFileHandle fileHandleForWritingAtPath:@"/Users/ahug4122/RSItemDataLog.txt"];
	[fh seekToEndOfFile];
	
	for (int i = 0; i < [items count]; i++)
	{
		RunescapeItem *rsi = [items objectAtIndex:i];
		NSString *str = [[NSString alloc] initWithFormat:@"\n%@:%@", [rsi name], [rsi price]];
		NSData *data = [str dataUsingEncoding:NSASCIIStringEncoding];
		[fh writeData:data];
		[str release];
		
	}

when i have insert in this code.

i am writing data into one file(a.xml) in iphone default directory to put xml file.As the same file i have read them , to be change the data with directly for iphone default directory in that file(a.xml).

do you know any idea for file handling .reply this concept .

[85joshua@gmail.com]

Originally Posted by FlyingDiver

The NSFileHandle class description does say:



I think you need to use NSFileManager to check for the existence of the file, and create it if needed.

joe

i am writing data into one file(a.xml) in iphone default directory to put xml file.As the same file i have read them , to be change the data with directly for iphone default directory in that file(a.xml).

do you know any idea for file handling .reply this concept .

[FlyingDiver]

Originally Posted by 85joshua@gmail.com

i am writing data into one file(a.xml) in iphone default directory to put xml file.As the same file i have read them , to be change the data with directly for iphone default directory in that file(a.xml).

do you know any idea for file handling .reply this concept .

What so you mean "iphone default directory". If it's the main bundle of the application, you can't write there. You can write to the documents directory.

joe

[85joshua@gmail.com]

Originally Posted by FlyingDiver

What so you mean "iphone default directory". If it's the main bundle of the application, you can't write there. You can write to the documents directory.

joe

hi FlyingDriver

I had already done with in this concept using array function.

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
	NSString *documentsDirectory = [paths objectAtIndex:0];
	return [documentsDirectory stringByAppendingPathComponent:kFilename];

but "how to edit the file(a.xml) in the phone simulater from the document directory" and "how to read the data from the iphone simulator in the document directory".

I have store the application configuration file(.xml) in the iphone then i have edit,read and write the file from the iphone document directory and automatically change the settings.

Where to go and find the document directory in iphone simulator.
do u have understand.if you have any idea send reply me for example or documentation