Speculative fix for #380. Calling `-[ASImageNode setImage:]` on a
background queue will take the image lock, then trampoline to the main
queue to invalidate calculatedSize and set needsDisplay without
releasing the lock. Any other method call that takes the image lock on
the main queue can block on the trampoline completing -- deadlock.
Note that the trampoline is itself a clowny workaround for thread
affinity (#134) and should be removed. With this patch applied,
ASImageNode's `-setImage:` and `-calculateSizeThatFits:` can still race:
1. -setImage changes _image, then trampolines to main
2. -calculateSizeThatFits measures _image
3. trampoline completes, invalidates calculated size
4. ???
5. ~~profit!~~ 💥
In addition to building & testing AsyncDisplayKit, this new build script
can ensure that all example projects still compile. This will prevent
breaking API changes from landing without updating sample projects that
use them. It's also extensible, so we can add additional integration
tests in future (e.g., non-CocoaPods framework integration).
ASImageNodeTint is inflexible (your options are "no tint" and "use
`[UIColor grayColor]`") and needlessly complicates the ASImageNode
implementation. Use ASImageNodeTintColorModificationBlock() instead.
Closes#383.
This brings back the concept of a window store for nodes that are in the working range (reverting #127). It turns out that due to the system architecture if there are nodes who fetch remote content (e.g. `ASNetworkImageNode`), calls to `-display` will occur before fetching has been completed. The next chance the nodes have to decode and display content is then when they are actually on the screen, thus defeating the purpose of a working range.
With the reintroduction of the working range window, nodes are "stored" in the window and when content is finished being fetched, CA triggers `-display` since they are part of a view hierarchy.
This can be tested in the Kittens project by insuring that before `ASRangeController` adds a node to [a visible view](https://github.com/facebook/AsyncDisplayKit/blob/master/AsyncDisplayKit/Details/ASRangeController.mm#L57) that the image node (with remote content) has set its layer's contents.
