save file to path

gistfile1.txt

    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,  NSUserDomainMask,YES);
    NSString *ourDocumentPath =[documentPaths objectAtIndex:0];

    NSString * filepath = [ourDocumentPath stringByAppendingString:[NSString stringWithFormat:@"image%lu.png",(unsigned long)index]];
//    [fileManager createDirectoryAtPath:filepath withIntermediateDirectories:YES attributes:nil error:nil];
    [fileManager createFileAtPath:filepath
                         contents:UIImagePNGRepresentation(image)
                       attributes:nil];
    NSLog(@"-------file %@",filepath);