This document describes the Accelerate framework, which contains C APIs for vector and matrix math, digital signal processing, large number handling, and image processing.

The Core Graphics framework is based on the Quartz advanced drawing engine. It provides low-level, lightweight 2D rendering with unmatched output fidelity. You use this framework to handle path-based drawing, transformations, color management, offscreen rendering, patterns, gradients and shadings, image data management, image creation, and image masking, as well as PDF document creation, display, and parsing.

Core Video provides a pipeline model for digital video. Partitioning the processing into discrete steps makes it simpler for developers to access and manipulate individual frames without having to worry about translating between data types (QuickTime, OpenGL, and so on) or display synchronization issues. Applications that do not need to manipulate individual video frames should never need to use Core Video directly.

Evernote SDK for iOS.

The Image I/O programming interface framework allows applications to read and write most image file formats. This framework offers high efficiency, color management, and access to image metadata.

Keyboard TextField Manager

The Media Player framework provides facilities for playing movie, music, audio podcast, and audio book files. This framework also gives your application access to the iPod library, letting you find and play audio-based media items synced from iTunes on the desktop. iPod library access is read-only.

Work with image and video assets managed by the Photos app, including those from iCloud Photo Library and Live Photos. Fetch and cache full-sized assets or thumbnails asynchronously, revise content, and sync revisions to multiple devices. In iOS and macOS, the Photos framework provides classes that support building photo editing extensions for the Photos app. In iOS and tvOS, the Photos framework also provides direct access to the photo and video assets managed by the Photos app, including the iCloud Photo Library. Use this framework to retrieve assets for display and playback, edit their image or video content, or work with collections of assets such as albums, moments, and iCloud Shared Albums.