目前openSDK的iOS文档里，在分享图片时，只给出了一个单图分享的代码，请问openSDK如何分享多图（9张以内）到微信（朋友，或朋友圈）：

UIImage *image = [UIImage imageNamed:@"res2.png"];
imageData = UIImageJPEGRepresentation(image, 0.7);
   
WXImageObject *imageObject = [WXImageObject object];
imageObject.imageData = imageData;

WXMediaMessage *message = [WXMediaMessage message];
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"res5"
                                                     ofType:@"jpg"];
message.thumbData = [NSData dataWithContentsOfFile:filePath];
message.mediaObject = imageObject;

SendMessageToWXReq *req = [[SendMessageToWXReq alloc] init];
req.bText = NO;
req.message = message;
req.scene = WXSceneTimeline;
[WXApi sendReq:req];