Create apps with rich capabilities to receive, process, and intelligently store data that work across multiple devices in the Apple ecosystem. This book will show you how to organize your app's data and make it work for you and your users! With many frameworks, there's a point in the learning curve where you stop fearing the mountain of knowledge to learn and just enjoy the power to play and develop. For some reason many developers feel that point seems harder to reach with Core Data. And that's unjustified-Core Data is a great framework that with powerful, optimized tools right out of the box. So it's time you stopped fearing the journey and took your steps further out into the world of enjoying the power of Core Data. With what you learn, you can build apps to deal with a large amount of data and complex relationships in intelligent and efficient ways. Core Data has many secrets underneath the hood that can power up your persistent store like never before. Tools such as Undo, objects deletion, migration, and more. Set up your store and your data model, handle objects with a multi-threading environment, write integration tests, and share your data with an Apple Watch app and iCloud.What You'll Learn Work with Core Data objects across apps and platforms Write integration tests with your persistent store Fetch, organize, write, and process data efficiently and intelligently Who This Book Is For Experienced iOS developers with Swift knowledge creating iOS apps that require saving complex data on the device other than a few numbers or text.

Maintaining an iOS project often results in thousands of code files scattered around your folders. Did you ever wanted to reuse those files with other projects but found yourself making copies of Swift files? You are not alone! Many iOS developers struggle with this issue as well-unorganized projects, duplicated files, difficulty in testing, and long complication times. This book will show how Swift Package Manager can help you handle these problems by restructuring your project to make it efficient and straightforward. Swift Package Manager isn't magic, but you'll likely need a little guidance in using this nifty tool. You'll see how to reorganize projects smartly and efficiently, create your first Swift package, and learn what libraries are in this context. Then share your package with the rest of your projects. Next test your library's quality. And then take your library to the next level of power by including files that go beyond just code. By going over the methodology of big project organization, you will have the ability to extend your project into the future as Apple sees it. Make no mistake-the path for a modular and flexible project is not easy. With the help of Swift Package Manager, it becomes possible and worth it. What You'll Learn Create a Swift package both from the command line and from Xcode Manage Swift packages in public and private Git repositories Build test suites to test integrations between packages Who This Book Is For Senior iOS developers and team leaders who already have professional experience with Swift.

Discover what tools there are for unit testing in iOS, and how to work in a test-driven environment. This book reveals how testing is a crucial capability in any iOS developer's toolset, and a minimum requirement in iOS interviews. A few years ago, tests on mobile platforms were not very popular. It wasn't a technical constraint, more a cultural one. But these days it's a crucial skill set, especially when projects become big and hard to maintain. This book shows you how to set up a testing target in XCode unit tests. You'll learn how to write unit tests properly and incorporate concepts like spies and mocks and code coverage. You'll also learn the philosophy behind the architecture of UI tests, and how to mock network and DB layers in testing. Write unbreakable UI tests performance tests, as well. And learn the difference between integration tests and snapshot testing. This book will show you how to maintain code that's not only bug-free but will also remain high quality over time and maintainable while you make changes and refactors during an app's life. Testing in all its aspects is the best way of maintaining iOS projects to run fast and reliably long after you've released them. Many iOS developers working today lack an understanding of the advantages of testing, and might be unfamiliar with tools that make the job easier, such as XCTest framework. With Pro iOS Testing you'll see how to develop and test apps that work and stay working for a long time. What You'll Learn Set up a stable testing system Extend an app's lifetime with testing before release Incorporate testing into your everyday development routine Write unbreakable UI tests performance tests Understand the difference between integration tests and snapshot testing Who This Book Is ForProfessional iOS developers with extensive experience in the basics of building apps.