Proton is a utility framework for Cocoa and Cocoa Touch that provides tools useful for building a powerful model layer.

• A simple and extensible system for bindings, suitable for use on iOS and for replacing Cocoa Bindings on OS X
• Components to make Core Data easier to use, including:
  • PROCoreDataManager, to manage all the resources associated with a single database
  • Support for copying managed objects between contexts
  • Support for encoding and decoding managed objects to and from property lists
  • Convenience methods on NSManagedObject and NSManagedObjectContext so callers have to write less code
• A class for key-value observing that makes it easier to manage the observation of many different objects or key paths
• A couple macros to check key paths at compile time (i.e., fail to build when an invalid key path is used)
• Higher-order functions (map, filter, fold) for all built-in collection classes
• Extensions to NSUndoManager to support blocks and make it simpler to manage undo groupings
• PROFuture, an extremely fast and simple implementation of block-based futures

All of the above features are unit tested, to validate the typical use cases and detect any future breakage.

Proton has been built with the Model-View-ViewModel architectural pattern in mind. The PROViewModel abstract class can serve as a base for any application-specific view model layer.

All dependencies can be retrieved by running git submodule update --init --recursive from the top level of the repository.

• Xcode projects in the repository are configured using prebuilt xcconfigs
• The unit tests for Proton are written using Specta and Expecta
• Logging is implemented using the CocoaLumberjack logging framework
• Parts of libextobjc and SafeDispatch are used in Proton (but are already present in the repository)

Proton is released under a modified version of the 3-clause BSD license. See the LICENSE file for more information.