如何在相册中保存自制的实时照片？

Question

我尝试用JPG文件和MOV文件制作实时照片.就像这样:

   CGSize targetSize = CGSizeZero;
    PHImageContentMode contentMode = PHImageContentModeDefault;


    __weak NSURL *videoUrl;
    __weak NSURL *photoUrl;

//         Call private API to create the live photo
            self.livePhotoView.livePhoto = nil;
            self.livePhoto = nil;
            self.livePhoto = [[PHLivePhoto alloc] init];
            SEL initWithImageURLvideoURL = NSSelectorFromString(@"_initWithImageURL:videoURL:targetSize:contentMode:");
            if ([self.livePhoto respondsToSelector:initWithImageURLvideoURL]) {
                NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[self.livePhoto methodSignatureForSelector:initWithImageURLvideoURL]];
                [invocation setSelector:initWithImageURLvideoURL];
                [invocation setTarget:self.livePhoto];
                [invocation setArgument:&(photoURL) atIndex:2];
                [invocation setArgument:&(videoUrl) atIndex:3];
                [invocation setArgument:&(targetSize) atIndex:4];
                [invocation setArgument:&(contentMode) atIndex:5];
                [invocation invoke];
            }

            // Set the live photo
            self.livePhotoView.livePhoto = self.livePhoto;

最后,我得到了实时照片并在livePhotoView中显示它.然后我尝试保存或分享它.我使用Class UIActivityViewController.Like this:

  if (self.livePhoto) {

    UIActivityViewController *activityViewController =
    [[UIActivityViewController alloc] initWithActivityItems:@[self.livePhotoView.livePhoto]
                                      applicationActivities:nil];
    [self presentViewController:activityViewController
                       animated:YES
                     completion:^{
                         // ...
                     }];


}

当我分享实时照片时,我分享的只是静止图像.当我选择保存实时照片时,我在相册中找不到任何内容.我在很多地方搜索.我只是在这个https:// github中找到一些信息.com/genadyo/LivePhotoDemo/issues/3.但它没有解决我的问题.

我发现一个应用程序可以在AppStore中完成.但我无法理解它是如何工作的.https://itunes.apple.com/cn/app/livemaker-free-for-live-photo/id1053967828?mt=8