I kind of missed the news yesterday.
If you did too, Apple yesterday shipped a beta version of their new photos management app, appropriately called "Photos."
As always, developers around the globe jumped in to dissect the app, finding something interesting: Photos was built using a new framework called UXKit.
Someone class-dumped UXKit and made it available on Github. Take a look..
WWDC 2015 is going to be fun.
Edit: Notice how it is still Objective-C. ;)