Book Image

iOS 13 Programming for Beginners - Fourth Edition

By : Ahmad Sahar, Craig Clayton
Book Image

iOS 13 Programming for Beginners - Fourth Edition

By: Ahmad Sahar, Craig Clayton

Overview of this book

iOS 13 comes with features ranging from Dark Mode and Catalyst through to SwiftUI and Sign In with Apple. If you're a beginner and are looking to experiment and work with these features to create your own apps, then this updated fourth edition gets you off to a strong start. The book offers a comprehensive introduction for programmers who are new to iOS, covering the entire process of learning the Swift language, writing your own apps, and publishing them on the App Store. This edition is updated and revised to cover the new iOS 13 features along with Xcode 11 and Swift 5. The book starts with an introduction to the Swift programming language, and how to accomplish common programming tasks with it. You'll then start building the user interface (UI) of a complete real-world app, using the latest version of Xcode, and also implement the code for views, view controllers, data managers, and other aspects of mobile apps. The book will then help you apply the latest iOS 13 features to existing apps, along with introducing you to SwiftUI, a new way to design UIs. Finally, the book will take you through setting up testers for your app, and what you need to do to publish your app on the App Store. By the end of this book, you'll be well versed with how to write and publish apps, and will be able to apply the skills you've gained to enhance your apps.
Table of Contents (33 chapters)
1
Section 1: Swift
10
Section 2: Design
15
Section 3: Code
26
Section 4: Features

Creating a custom color

In the previous chapter, you used a custom color for the Launch screen. You can actually create custom colors and assign them a name in the Assets.xcassets file. This makes them really easy to reuse and ensures consistency in your project. In this section, you will create a custom color and assign it to the collection view cells. Follow these steps to do so:

  1. Click on the Assets.xcassets folder in the Project navigator and right-click in the clear white space of the document outline, as shown in the following screenshot:
  1. Choose New Folder from the pop-up menu:
  1. Change the name of the folder to colors:

If you make a mistake while renaming the folder, remember that you can always select the name and press Return to make it editable.

  1. Right-click on the colors folder and choose New Color Set:
  1. Click on the Color Set and click the Attributes inspector...