Book Image

Learn Swift by Building Applications

By : Emil Atanasov, Giordano Scalzo, Emil Atanasov
Book Image

Learn Swift by Building Applications

By: Emil Atanasov, Giordano Scalzo, Emil Atanasov

Overview of this book

Swift Language is now more powerful than ever; it has introduced new ways to solve old problems and has gone on to become one of the fastest growing popular languages. It is now a de-facto choice for iOS developers and it powers most of the newly released and popular apps. This practical guide will help you to begin your journey with Swift programming through learning how to build iOS apps. You will learn all about basic variables, if clauses, functions, loops, and other core concepts; then structures, classes, and inheritance will be discussed. Next, you’ll dive into developing a weather app that consumes data from the internet and presents information to the user. The final project is more complex, involving creating an Instagram like app that integrates different external libraries. The app also uses CocoaPods as its package dependency manager, to give you a cutting-edge tool to add to your skillset. By the end of the book, you will have learned how to model real-world apps in Swift.
Table of Contents (14 chapters)
Adding Interactivity to Your First App

Primary collection types

In Swift, there are three collection types (for simplicity, we will discuss only mutable collections):

  • Array: An ordered (indexed) list of values which are from the same data type
  • Set: An unordered collection of unique values from the same data type
  • Dictionary: An unordered collection map (key -> value), which links a key with a value, and the keys should be unique and from the same data type

Each collection has a fixed data type and there is no way to store values from different data types in the collection. This will become clear later in the chapter.

Array, dictionary, and set are implemented using generics and are called generic collections.


Generics is a pattern approach to defining...