NSURL* url = [NSURL URLWithString:@"xxx"];    ASIFormDataRequest* request = [ASIFormDataRequest requestWithURL:url];    request.uploadPRogressDelegate = viewPost.progressView;    request.showAccurateProgress = YES;    request.shouldContinueWhenAppEntersBackground = YES;        if ([imageArray count] > 0) {        [request setPostFormat:ASIMultipartFormDataPostFormat];        for (NSData* data in imageArray) {            NSInteger idx = [imageArray indexOfObject:data];            [request addData:data withFileName:[NSString stringWithFormat:@"image%d.png",idx] andContentType:@"image/png" forKey:@"photos[]"];        }    }