AdvancedNSOperations
Objective-C implementation inspired by concepts introduced at WWDC 2015 Session 226 Advanced NSOperations. (https://developer.apple.com/videos/wwdc/2015/?id=226)
Work in progress. Want to help? Please check the issues: https://github.com/purrrminator/AdvancedNSOperations/issues
Original codebase has been written on Swift, download link: https://developer.apple.com/sample-code/wwdc/2015/downloads/Advanced-NSOperations.zip