สแตก Core Data

Core Data is Apple's mature framework for saving structured app data on the device, so your records survive after the app closes. 💾

The Core Data stack is the small set of objects that work together to load your data model and read or write records.

Your entities live in a .xcdatamodeld file, a visual schema where you define the types and attributes Core Data will store.

The NSPersistentContainer wraps the whole stack: it loads your model and sets up the underlying storage for you.

Call loadPersistentStores to open the database. Its closure tells you whether the store opened or failed.

The viewContext is your in-memory scratchpad for objects on the main thread, where you create, edit, and read records.

Most apps wrap the stack in one small controller class, so the rest of the app shares a single, ready-to-use context.

Pass the context into SwiftUI through the environment, so any view can reach it without manual hand-offs.

Changes stay in memory until you call save on the context, which writes everything to disk in one step.

Sharing a single stack keeps every view looking at the same data, so nothing falls out of sync across screens.

Build the stack once at app launch and hold onto it, so the container is ready before any screen needs data.

You set up the stack. One quick question about the pieces.

You met the Core Data stack: a model file, a persistent container, and a view context you inject into SwiftUI to read and save data. ✨