Updated the SandwichSaturation app with data persistence with core data.
- Save Scope Bar Selection into User Defaults so it can persist between app launches.
- Remove hard-coded sandwiches & load Data from JSON File (sandwiches.json)
- Create a Core Data model and only on first launch seed the model with data from JSON File
- Use Core Data to retrieve data for display in the TableView
- When a user Adds a New Sandwich, ensure it is saved to Core Data.
- Re-wire the filter functionality to use Core Data queries using NSCompoundPredicate
- Allow users to delete sandwiches from the tableview & Core Data.
- Use Core Data to sort sandwiches alphabetically using NSSortDescriptor
- Additional swipe actions for hiding, marking as Favorite, details view of sandwiches
Another option for packaging seed data is a Property List (plist)
Features of using a Property List (plist)
- a File-based approach for persisting simply-structured data sets
- Entire contents of a plist get loaded into memory when you access the file
- Way to ship initial configuration for your app
- Capable of storing lists of data with predictable size
if I were shipping SandwichSaturation, I would pick JSON over the Property List, here are the reasons why
- JSON is a very simple, but very powerful way to express data.
- JSON tends to yield more compact data/files than XML, but still can be quite readable (unlike binary).
- JSON data structures map naturally onto concepts supported by just about every language and library.
- Swift swift supports JSON natively with Codable, thus it's easy to handle JSON files,
- JSON became the file format of choice because everyone can share the files. This makes use of JSON quite nice when you work in a multi-platform situation. Just write the file once, share it, life goes on.
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- If you have a feature request, open an issue
- If you want to contribute, submit a pull request