Sharing Facebook open graph action succeeds, but post isn't visible - ios

Question

I'm migrating a legacy app from facebook iOS SDK 2.x to 3.x, and I'm having trouble getting my open graph object to share successfully.
Here's the code I have to share the object:
NSMutableDictionary *properties = [#{
#"og:type": #"my-app:my-object",
#"og:title": #"Title",
#"og:description": #"text",
} mutableCopy];
if(photoUrl){
FBSDKSharePhoto *photo = [FBSDKSharePhoto photoWithImageURL:[NSURL URLWithString:photoUrl] userGenerated:NO];
properties[#"og:image"] = #[photo];
}
FBSDKShareOpenGraphObject* graphObject = [FBSDKShareOpenGraphObject objectWithProperties:properties];
FBSDKShareOpenGraphAction *action = [[FBSDKShareOpenGraphAction alloc] init];
action.actionType = #"my-app:my-action";
[action setObject:graphObject forKey:#"my-object"];
FBSDKShareOpenGraphContent *content = [[FBSDKShareOpenGraphContent alloc] init];
content.action = action;
content.previewPropertyName = #"my-object";
FBSDKShareAPI* shareAPI = [FBSDKShareAPI shareWithContent:content delegate:[ShareDelegate theShareDelegate]];
if(![shareAPI share]){
NSLog(#"![shareAPI share]");
onFail(nil);
}else{
NSLog(#"Share succeeded");
onFinish();
}
The share action appears to succeed. The delegate method -(void)sharer:(id<FBSDKSharing>)sharer didCompleteWithResults:(NSDictionary *)results is called with this results dictionary:
{
completionGesture = post;
postId = 1608774589402167;
}
But the post doesn't appear in the test user's news feed. Also, on the open graph -> action types section of the app dashboard at https://developers.facebook.com I see this error message:
Your Open Graph action failed to publish on any of the Platforms you submitted. Make sure the action is working properly by publishing the action with a test user before resubmitting.
This graph action was being shared successfully using the Facebook 2.x SDK for iOS.
What could the point of failure be?

Answer 1

I'm not sure if you still need the answer here, but to get the action to show in the users' timeline you need to set the key on your action:
[action setString:#"true" forKey:#"fb:explicitly_shared"];
This requires configuration for your custom action as well (check boxes at the bottom of the page).