JSQMessagesViewController is a UIKit-based conversational UI framework and library for iOS. It provides a set of components for rendering interactive message streams, multimedia chat histories, and customizable input controllers within mobile applications.
The framework features a layout engine that calculates dynamic bubble dimensions and handles orientation-aware rendering. It includes a resizing text input area with a customizable toolbar for sending and formatting messages, as well as support for group conversations with multiple participants.
The library covers message rendering through branded visual styling, avatar visibility control, and localized metadata for timestamps. It integrates rich media and data detectors to create interactive text and supports customizable chat cells and bubble animations.
The project is implemented in Objective-C.