Sofia Martinez

Core Data is Apple's object graph and persistence framework, essential for complex data models and offline support. I define entities and relationships in the .xcdatamodeld file, then generate NSManagedObject subclasses. The NSPersistentContainer enca

MVVM (Model-View-ViewModel) separates concerns cleanly in iOS apps. Models hold data, Views display UI, and ViewModels mediate between them with business logic and state. Views bind to ViewModel properties using Combine or SwiftUI's property wrappers.

Combine provides a declarative Swift API for processing values over time, perfect for handling async events like network requests, user input, and timers. Publishers emit sequences of values, and subscribers receive them. Operators transform, filter,

SwiftUI revolutionizes iOS development with declarative syntax where you describe what the UI should look like based on state. Views automatically update when state changes using property wrappers like @State, @Binding, and @ObservedObject. The @State