Super Hero Library

This was a basic project I whipped up based of an old 67-311 database exercise on super heroes. The main point was to demonstrate one-to-many relations in CoreData and how they differ from traditional databases. A few notes on this project:

1. I wrote this using Xcode 14, but if I create the intial project with CoreData checked off, I get a situation where the screen in the simulator is completely black. If I create the initial project without CoreData and use Paul Hudson's (@twostraws) file DataController.swift and incorporate that into the main app SuperHeroLibraryApp.swift, it all works fine.

2. I do have some other ideas to expand in the future (include the people table from 67311, and the like), but for now, just a single screen app. When first running, click "Add Examples" button at the buttom of the screen to add 9 heroes to the database.

3. I did use the SuperHero.xcdatamodeld to create two entities, Franchise (DC, Marvel, New England Comics, etc. -- basically publishers) and Hero (which just have names and powers for now). I also used the xcdatamodeld to set up the relationships and constraints.

4. In order to have more control and deal with options more transparently, I set the Codegen option on all entities to "Manual/None" and then used the Editor > Create NSManagedObject subclasses ... option to export these to code for manipulation. In particular, have some wrappers to handle nil cases as well as an array of heros with a franchise.

More to come, but this gets the relational part across for now.

Qapla'