Facebook iOS SDK 4.1.0 Share Callback

Question

Using the FBSDK mentioned in the title of this question, I present a simple share dialog in a view controller:

// Setup the content for the share
FBSDKShareLinkC         


        

Answer 1

Edit: It turns out, the results dictionary is empty when the completion method is called if the Facebook app is installed on the device. To overcome this, a check needs to be done to see if Facebook is installed first.

Of course after posting I stumbled upon the answer. The results dictionary returned in the didCompleteWithResults method contains a postId key if the share actually occurred. So the logic is as simple as:

- (void)sharer:(id<FBSDKSharing>)sharer didCompleteWithResults:(NSDictionary *)results
{
    NSURL *fbURL = [NSURL URLWithString:@"fb://"];
    if (![[UIApplication sharedApplication] canOpenURL:fbURL])
        if (results[@"postId"]) {
            NSLog(@"Sweet, they shared, and Facebook isn't installed.");
        } else {
            NSLog(@"The post didn't complete, they probably switched back to the app");
        }
    } else {
        NSLog(@"Sweet, they shared, and Facebook is installed.");
    }
}

Although this works, it doesn't seem to be a very safe way of going about things (what if Facebook changes the key from "postId" to something else in the future? Unlikely but you get my point).