Book Image

iOS 12 Programming for Beginners - Third Edition

By : Craig Clayton
Book Image

iOS 12 Programming for Beginners - Third Edition

By: Craig Clayton

Overview of this book

Want to build iOS 12 applications from scratch with the latest Swift 4.2 language and Xcode 10 by your side? Forget sifting through tutorials and blog posts; this book is a direct route to iOS development, taking you through the basics and showing you how to put principles into practice. Take advantage of this developer-friendly guide and start building applications that may just take the App Store by storm! If you’re already an experienced programmer, you can jump right in and learn the latest iOS 12 features. For beginners, this book starts by introducing you to iOS development as you learn Xcode and Swift. You'll also study advanced iOS design topics, such as gestures and animations, to give your app the edge. You’ll explore the latest Swift 4.2 and iOS 12 developments by incorporating new features, such as the latest in notifications, custom-UI notifications, maps, and the recent additions in Sirikit. The book will guide you in using TestFlight to quickly get to grips with everything you need to get your project on the App Store. By the end of this book, you'll be ready to start building your own cool iOS applications confidently.
Table of Contents (27 chapters)
Free Chapter
1
Getting Familiar with Xcode

Displaying ratings in our custom UIControl

Inside the RatingsView.swift file, we first need to create all of the variables we will need. Add the following under the class declaration:

let imgFilledStar = #imageLiteral(resourceName: "filled-star")
let imgHalfStar = #imageLiteral(resourceName: "half-star")
let imgEmptyStar = #imageLiteral(resourceName: "empty-star")
let shouldBecomeFirstResponder = true
var rating:CGFloat = 0.0
var totalStars = 5

If you copy and paste this code, you will have to select each image to see the actual image. If you are having trouble using an image literal, you can use UIImage(named:) instead.

We are doing something new in this file. We are using image literals as our variables. If you type Image Literal in your file and hit return, you will see a small icon:

Double-click this icon and a modal will appear, which will allow...