AsyncDisplayKit－－demo

 [](https://travis-ci.org/facebook/AsyncDisplayKit) [](http://cocoapods.org/?q=AsyncDisplayKit) []() [](https://github.com/facebook/AsyncDisplayKit/blob/master/LICENSE) AsyncDisplayKit is an iOS framework that keeps even the most complex user interfaces smooth and responsive. It was originally built to make Facebook's [Paper](https://facebook.com/paper) possible, and goes hand-in-hand with [pop](https://github.com/facebook/pop)'s physics-based animations &mdash; but it's just as powerful with UIKit Dynamics and conventional app designs. ### Quick start ASDK is available on [CocoaPods](http://cocoapods.org). Add the following to your Podfile: ```ruby pod 'AsyncDisplayKit' ``` (ASDK can also be used as a regular static library: Copy the project to your codebase manually, adding `AsyncDisplayKit.xcodeproj` to your workspace. Add `libAsyncDisplayKit.a`, AssetsLibrary, and Photos to the "Link Binary With Libraries" build phase. Include `-lc++ -ObjC` in your project linker flags.) Import the framework header, or create an [Objective-C bridging header](https://developer.apple.com/library/ios/documentation/swift/conceptual/buildingcocoaapps/MixandMatch.html) if you're using Swift: ```objective-c #import <AsyncDisplayKit/AsyncDisplayKit.h> ``` AsyncDisplayKit Nodes are 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 &mdash; for example, you could do something like this in a UIViewController: ```objective-c dispatch_async(_backgroundQueue, ^{ ASTextNode *node = [[ASTextNode alloc] init]; node.attributedString = [[NSAttributedString alloc] initWithString:@"hello!" attributes:nil]; [node measure:CGSizeMake(screenWidth, FLT_MAX)]; node.frame = (CGRect){ CGPointZero, node.calculatedSize }; // self.view isn't a node, so we can only use it on the main thread dispatch_async(dispatch_get_main_queue(), ^{ [self.view addSubview:node.view]; }); }); ``` AsyncDisplayKit at a glance: * `ASImageNode` and `ASTextNode` are drop-in replacements for UIImageView and UITextView. * `ASMultiplexImageNode` can load and display progressively higher-quality variants of an image over a slow cell network, letting you quickly show a low-resolution photo while the full size downloads. * `ASNetworkImageNode` is a simpler, single-image counterpart to the Multiplex node. * `ASTableView` and `ASCollectionView` are a node-aware UITableView and UICollectionView, respectively, that can asynchronously preload cell nodes &mdash; from loading network data to rendering &mdash; all without blocking the main thread. You can also easily [create your own nodes](https://github.com/facebook/AsyncDisplayKit/blob/master/AsyncDisplayKit/ASDisplayNode%2BSubclasses.h) to implement node hierarchies or custom drawing. ### Learn more * Read the [Getting Started guide](http://asyncdisplaykit.org/guide/) * Get the [sample projects](https://github.com/facebook/AsyncDisplayKit/tree/master/examples) * Browse the [API reference](http://asyncdisplaykit.org/appledoc/) * Watch the [NSLondon talk](http://vimeo.com/103589245) ## Testing AsyncDisplayKit has extensive unit test coverage. You'll need to run `pod install` in the root AsyncDisplayKit directory to set up OCMock. ## Contributing See the CONTRIBUTING file for how to help out. ## 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.