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* [Yoga + AsyncDisplayKit] Initial commit for supporting Yoga-powered layout calculation. Because this results in ASLayout objects, it preserve support for automaticallyManagesSubnodes as well as the animated transition system. More work remains to vet performance of the new mode, and it will remain in +Beta for the forseeable future. I'm not sure that this should ever be used as the primary ASDK layout system, but it should remain an option for some apps to experiment with if they require an implementation that more strictly mirrors W3C standard Flexbox. * [Yoga] Improve usage of ASHierarchyState to ensure simultaneous yoga layouts can't happen. * [Yoga] Strictly minimize the impact of the Yoga integration on existing code. Created new file ASDisplayNode+Yoga.mm, reduced size and number of integration points in core code. * [Yoga] Figured out how to further reduce ASDisplayNode.mm impact by allocating _yogaNode in property accessor, and changing all accesses to use the property.
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.