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AsyncDisplayKit Overview

An iOS framework from the developers at Facebook that aims to keep complex user interfaces smooth and responsive. It's built to go hand-in-hand with Pop's physics-based animations, but also works with conventional app designs and UIKit Dynamics. The framework centres around AsyncDisplayKit Nodes that provide a thread-safe abstraction layer over UIViews and CALayers. You can construct entire node hierarchies in parallel, or instantiate and size a single node on a background thread. Comes with drop-in replacements for UIImageView, UITextView and UITableView.

AsyncDisplayKit latest README

AsyncDisplayKit has been moved and renamed: Texture

Learn more here

Installation

ASDK is available via CocoaPods or Carthage. See our Installation guide for instructions.

Performance Gains

AsyncDisplayKit's basic unit is the node. An ASDisplayNode is an abstraction over UIView, which in turn is an abstraction over CALayer. Unlike views, which can only be used on the main thread, nodes are thread-safe: you can instantiate and configure entire hierarchies of them in parallel on background threads.

To keep its user interface smooth and responsive, your app should render at 60 frames per second — the gold standard on iOS. This means the main thread has one-sixtieth of a second to push each frame. That's 16 milliseconds to execute all layout and drawing code! And because of system overhead, your code usually has less than ten milliseconds to run before it causes a frame drop.

AsyncDisplayKit lets you move image decoding, text sizing and rendering, layout, and other expensive UI operations off the main thread, to keep the main thread available to respond to user interaction.

Advanced Developer Features

As the framework has grown, many features have been added that can save developers tons of time by eliminating common boilerplate style structures common in modern iOS apps. If you've ever dealt with cell reuse bugs, tried to performantly preload data for a page or scroll style interface or even just tried to keep your app from dropping too many frames you can benefit from integrating ASDK.

Learn More

Read the our Getting Started guide
Get the sample projects
Browse the API reference

Getting Help

We use Slack for real-time debugging, community updates, and general talk about ASDK. Signup yourself or email AsyncDisplayKit(at)gmail.com to get an invite.

Contributing

We welcome any contributions. See the CONTRIBUTING file for how to get involved.

License

AsyncDisplayKit is BSD-licensed. We also provide an additional patent grant. The files in the /examples directory are licensed under a separate license as specified in each file; documentation is licensed CC-BY-4.0.

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