What are the best practices for maintaining Swift code in large projects?

While maintaining Swift codebases for large projects, structure the code modularly, aiming for maximum reusability and ease of maintenance. Use consistent naming conventions and follow the Swift coding conventions for readability. Employ protocol-oriented programming to keep the various components flexible and loose, which is essential for scaling. Make use of the access control features of Swift to encapsulate code and avoid inadvertent cross-module dependencies. Refactor regularly to reduce complexity, avoid redundancy, and guarantee quality code. Unit tests are especially important in catching errors early, while Swift’s type safety and options prevent many run-time problems. Both practices contribute to better readability, robustness, and maintainability when working on large-scale Swift projects.