GraphQL on Swift: The Complete Guide to Building APIs for iOS and macOS

This book is a practical guide to integrating GraphQL into the Swift ecosystem for developing applications on iOS and macOS. Unlike traditional REST APIs, GraphQL provides a flexible and efficient way to work with data, allowing the client to request exactly what is needed and nothing more. The author, with many years of experience in native application development, will guide you step by step from the basics of GraphQL to building complex client-server solutions using modern Apple frameworks.

Who is this book for?

• iOS/macOS developers who want to master a modern approach to building APIs and improve the performance of their applications.
• Backend developers using Swift who wish to learn server-side development with Vapor or Graphiti.
• Team Leads and Architects looking for efficient ways to organize the network layer in large projects.
• Students and beginner programmers familiar with the basics of Swift and wanting to delve into modern technologies.

What will you learn from this book?

• GraphQL Basics: types, schemas, queries, mutations, and subscriptions — from scratch to confident usage.
• Integration with Apollo iOS: client setup, code generation, working with caching, and error handling.
• Modern Architectures: using GraphQL with SwiftUI and Combine for reactive and responsive interfaces.
• Server-Side Development: building a GraphQL API in Swift using the Vapor and Graphiti frameworks, including authentication and pagination.
• Performance Optimization: managing data loading, request batching, working with offline mode and caching.
• Testing and Debugging: writing unit tests for GraphQL queries, using tools like GraphQL Playground and Apollo Studio.
• Advanced Topics: federation, directives, real-world examples from large application practices.

The book contains many ready-to-use code examples that you can immediately apply in your projects. Special attention is paid to practical aspects: how to avoid common mistakes, how to organize code for scalability, and how to integrate GraphQL with Core Data, Realm, and other storage solutions.

After reading, you will be able to build a complete application with GraphQL on Swift from scratch, whether it's a social network, marketplace, or corporate tool. You will learn to think in terms of graphs, effectively manage state, and create APIs that are easy to maintain and evolve.

The book is suitable both for self-study and for use as a reference guide in daily work. Start your journey into the world of modern development with GraphQL and Swift today!