ios - 如何使用 Facebook iOS SDK 4.0 FBSDKShareDialog 分享 NSData 或 phasset 视频

Question

我注意到您可以简单地将 NSData 视频分享到 facebook messenger:

NSData *videoData = [NSData dataWithContentsOfURL:localVideoUrl];
[FBSDKMessengerSharer shareVideo:videoData withOptions:options];

但我在分享到 Facebook 提要时遇到了同样的困难使用本地视频文件或相集。

FBSDKShareVideo *video = [FBSDKShareVideo videoWithVideoURL:localVideoUrl];
FBSDKShareVideoContent *content = [[FBSDKShareVideoContent alloc] init];
[content setVideo: video];
[FBSDKShareDialog showFromViewController:nil withContent:content delegate:self];

com.facebook.sdk:FBSDKErrorDeveloperMessageKey= native 对话框只允许 Assets 文件 URL

我如何使用 phasset 视频实现类似的良好应用切换行为？

谢谢!

Answer 1

使用新的 Facebook SDK 4.0，视频必须作为 Assets URL 传递。您必须将本地视频路径复制到 Assets Library 并使用生成的 URL 在 Facebook 上分享。

第一步:

NSURL *videoURL=[NSURL fileURLWithPath:[[NSBundle mainBundle] pathForResource:@"IMG_1007" ofType:@"mp4"]];
[self saveToCameraRoll:videoURL];

第 2 步:

- (void)saveToCameraRoll:(NSURL *)srcURL
{
    NSLog(@"srcURL: %@", srcURL);

    ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
    ALAssetsLibraryWriteVideoCompletionBlock videoWriteCompletionBlock =
    ^(NSURL *newURL, NSError *error) {
        if (error) {
            NSLog( @"Error writing image with metadata to Photo Library: %@", error );
        } else {
            NSLog( @"Wrote image with metadata to Photo Library %@", newURL.absoluteString);
            url_new  = newURL;
        }
    };

    if ([library videoAtPathIsCompatibleWithSavedPhotosAlbum:srcURL])
    {
        [library writeVideoAtPathToSavedPhotosAlbum:srcURL
                                    completionBlock:videoWriteCompletionBlock];
    }
}

第 3 步:

FBSDKShareDialog *shareDialog = [[FBSDKShareDialog alloc] init];    
NSURL *videoURL = url_new;
FBSDKShareVideo *video = [[FBSDKShareVideo alloc] init];
video.videoURL = videoURL;
FBSDKShareVideoContent *content = [[FBSDKShareVideoContent alloc] init];   
content.video = video;
shareDialog.shareContent = content;
shareDialog.delegate = self;
[shareDialog show];

如果您有任何其他疑问，请告诉我。

谢谢!