I saw a custom asset bundle in an iOS project I evaluated, so at least I know it's possible.
My issue is that I'm using a CATiledLayer with about 22,000 tiles for a given image and it takes a very long time to compile (half an hour clean build, 5-10 minutes for regular build). So, I want to take all of the images and make a custom bundle to make it portable and hopefully not recompile into the app bundle each time.
How do I go about this? I checked the docs, but didn't see an explanation on how to actually create the bundle.
Answer is stupidly simple
Make a folder in finder, add files to it, rename it to bundlename.bundle
drag into Xcode - success!
to access, use the form of PathToMainBundle+"/bundlename.bundle"