The Share Dialog offers a lightweight and consistent way to enable sharing from your apps. People now have the option to share activity from apps through this dialog without needing to login to Facebook first. This eliminates 1 – 3 extra steps required for login when sharing via the feed dialog.
The Share Dialog further improves upon the iOS 6 share sheet by adding support for publishing Open Graph actions to make it easier for people to tell their stories on mobile. In addition, people can now tag friends and share where they are enabling them to share in a more meaningful and engaging way, while helping even more people connect with your app.
Developers can get started on implementing the new dialog by downloading the SDK from here.