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

Question

我注意到你可以简单地将NSData视频分享给facebook messenger：

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

但是当我使用本地视频文件或phasset分享到Facebook Feed时，我遇到了同样的困难。

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

com.facebook.sdk：FBSDKErrorDeveloperMessageKey =原生对话框只允许使用资产文件URL

我如何使用phasset视频进行类似的不错的应用切换行为？

谢谢！

Answer 1

使用新的Facebook SDK 4.0，视频必须作为资产URL传递。 您必须将本地视频路径复制到资产库，并使用生成的URL在Facebook上共享。

步骤1：

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！

Answer 2

请检查：1）视频的大小必须小于12MB。 2）分享的人应安装Facebook for iOS客户端，版本26.0或更高版本。

你应该使用以下行：

NSURL *movieUrl = [info objectForKey:UIImagePickerControllerReferenceURL];

代替

NSURL *movieUrl = [info objectForKey:UIImagePickerControllerMediaURL];