Ice Cream Builder: A simple Messages app extension

Last Revision:
Version 1.1, 2017-03-27
Fixes the content inset being used when the presentation style changes.
(Full Revision History)
Build Requirements:
Xcode 8.0 or later; iOS 10.0 SDK or later
Runtime Requirements:
iOS 10.0 or later

This sample is a simple example of building an app extension that interacts with the Messages app and lets users send interactive messages and create stickers.

The extension is based on a MSMessagesAppViewController subclass that then presents a child view controller depending on the current conversation, message state and presentation style. It also updates a conversation with new or updated messages and posts stickers to a conversation.