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

Search screen

The search screen has a search field at the top. This UISearchBar is a standard component that is used to allow the user to search through the data displayed on the screen. The UI component doesn't do the actual searching. It handles the user's interactions, and UISearchBarDelegate is responsible for taking action:

This is the layout of the screen, with a search bar at the top and a collection view below it. They are using constraints to fill the whole screen.

We need a new SearchViewController.swift file. It will store the logic of the view controller. The following code shows the initial implementation of the SearchViewController class:

class SearchViewController: UIViewController {    
private let photoCellReuseIdentifier = "PhotoCell"

var model:[PostModel]?

@IBOutlet weak var collectionView: UICollectionView!