upload image in flickr from iphone

Question

uploading image into flickr , flickr API provided

 NSInputStream *imageStream = [NSInputStream inputStreamWithData:imageData];
 [request uploadImageStream:imageStream suggestedFilename:@"Foobar.jpg"
    MIMEType:@"image/jpeg" 
    arguments:[NSDictionary dictionaryWithObjectsAndKeys:@"0", @"is_public", nil]];

but its not working. is there any other way to upload image in flickr thanks in advance