The Composable Architecture (TCA) is a modern architecture pattern for building applications in Swift. It’s designed to make SwiftUI development modular, testable, and scalable, addressing common challenges in state management and app organization. Created by Point-Free, TCA brings together Redux-style unidirectional data flow, modularity, and Swift’s type-safety to help developers manage complex app logic with clarity.
Check the offical page here.Understanding TCA: The Core Principles
TCA’s foundation is based on a few key principles: a single source of truth for state, unidirectional data flow, and modularity. This architecture pattern encourages developers to organize their apps around four core concepts:
- State: A struct that holds all the data needed to render a part of your app.
- Action: An enum that defines all the events that can affect the state.
- Environment: A structure holding dependencies, such as API clients or database connections.
- Reducer: A function that takes in the current state and an action, and returns the new state based on the action.
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