Append NSData to a file in Objective C

objective-c append nsdata
Nick Cartwright picture Nick Cartwright · Aug 10, 2009 · Viewed 13.9k times · Source

I'm attempting to download a large file on the iPhone and save it to disk as it is downloaded.

Ideally, in:

-(void)connection:(NSURLConnection*)connection didReceiveData:(NSData*)data {

}

I want to append 'data' to a file on disk.

I've checked out the NSData documentation. There are functions to write to a file, but I can't see anything to append to an existing file.

Does anyone know how I can append this data? Any help much appreciated! Nick.

Answer

mouviciel picture mouviciel · Aug 10, 2009

You can use a combination of -writeData: and -seekToEndOfFile methods from NSFileHandle class for writing NSData to the end of a file.

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