Unique Download Filename

gistfile1.m

NSString* fname = [target lastPathComponent];
NSString* fnameNoExt = [fname stringByDeletingPathExtension];
NSString* extension = [fname pathExtension];

int fileIndex = 1;
while ([[NSFileManager defaultManager] fileExistsAtPath: [folder stringByAppendingPathComponent:fname]])
{
    //NSLog(@"FNAME : %@",fname);
    fname = [NSString stringWithFormat:@"%@ (%d).%@", fnameNoExt, fileIndex, extension];
    //NSLog(@"Setting filename to :: %@",fname);
    fileIndex++;
}
target = [folder stringByAppendingPathComponent:fname];