I did take a look but the project is empty. At a minimum please define your core data model and update the project so that it does show some of the things you've tried. If you do that then I can help you get past the hurdle with an actual code example that makes sense in the context of your project.If you need a better start try out the Simple Core Data Relationships sample project in Xcode (it's still called TaggedLocations). You will be able to see how two core data objects are modeled and how to add the related objects to each other in code. To find and open the sample, just go to your Help tab and open the Documentation ~ from there just search for the words I mentioned above.
Topic:
App & System Services
SubTopic:
iCloud & Data
Tags: