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iOS 13 Programming for Beginners

By : Ahmad Sahar, Craig Clayton

3.8 (15)

iOS 13 Programming for Beginners

3.8 (15)

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.

Preface

Preface

Who this book is for

What this book covers

To get the most out of this book

Get in touch

Section 1: Swift

Section 1: Swift

Free Chapter

Getting Familiar with Xcode

Getting Familiar with Xcode

Technical requirements

Downloading and installing Xcode from the App Store

Understanding the Xcode user interface

Running the app in the Simulator

Using an iOS 13 device for development

Summary

Simple Values and Types

Simple Values and Types

Technical requirements

Understanding Swift playgrounds

Exploring data types

Exploring constants and variables

Understanding type inference and type safety

Exploring operators

Using the print() instruction

Summary

Conditionals and Optionals

Conditionals and Optionals

Technical requirements

Introducing conditionals

Introducing optionals

Summary

Range Operators and Loops

Range Operators and Loops

Technical requirements

Range operators

Loops

Summary

Collection Types

Collection Types

Technical requirements

Understanding arrays

Understanding dictionaries

Understanding sets

Summary

Functions and Closures

Functions and Closures

Technical requirements

Understanding functions

Understanding closures

Summary

Classes, Structures, and Enumerations

Classes, Structures, and Enumerations

Technical requirements

Understanding classes

Understanding structures

Understanding enumerations

Summary

Protocols, Extensions, and Error Handling

Protocols, Extensions, and Error Handling

Technical requirements

Understanding protocols

Understanding extensions

Exploring error handling

Summary

Section 2: Design

Section 2: Design

Setting Up the Basic Structure

Setting Up the Basic Structure

Technical requirements

Useful terms

Touring the Let's Eat app

Creating a new Xcode project

Setting up a Tab Bar Controller Scene and Launch screen

Summary

Building Your App Structure in Storyboard

Building Your App Structure in Storyboard

Technical requirements

Adding a collection view to the Explore screen

Connecting outlets in storyboard to the view controller

Configuring data source methods for the collection view

Adding a section header to the collection view

Creating a custom color

Configuring the collection view cell and section header size

Presenting a view modally

Summary

Finishing Up Your App Structure in Storyboard

Finishing Up Your App Structure in Storyboard

Technical requirements

Adding a table view to the Locations screen

Implementing the Restaurant List screen

Implementing the Restaurant Detail screen

Implementing the Review Form screen

Implementing the Map screen

Summary

Modifying and Configuring Cells

Modifying and Configuring Cells

Technical requirements

Modifying the Explore screen section header

Modifying the exploreCell collection view cell

Modifying the restaurantCell collection view cell

Configuring the locationCell table view cell

Summary

Section 3: Code

Section 3: Code

Getting Started with MVC and Collection Views

Getting Started with MVC and Collection Views

Technical requirements

Understanding the MVC design pattern

Exploring controllers and classes

Summary

Getting Data into Collection Views

Getting Data into Collection Views

Technical requirements

Understanding model objects

Displaying data in a collection view

Summary

Getting Started with Table Views

Getting Started with Table Views

Technical requirements

Understanding table views

Creating LocationViewController

Adding location data for the table view

Creating LocationDataManager

Cleaning up the user interface

Summary

Getting Started with MapKit

Getting Started with MapKit

Technical requirements

Understanding and creating annotations

Adding annotations to a map view

Going from the Map screen to the Restaurant Detail screen

Organizing your code

Summary

Getting Started with JSON Files

Getting Started with JSON Files

Technical requirements

Getting data from JSON files

Using data from JSON files in your app

Summary

Displaying Data in a Static Table View

Displaying Data in a Static Table View

Technical requirements

Setting up outlets for RestaurantDetailViewController

Displaying data in the static table view

Passing data from RestaurantListViewController to RestaurantDetailViewController

Summary

Getting Started with Custom UIControls

Getting Started with Custom UIControls

Technical requirements

Creating a custom UIControl object

Displaying stars in your custom UIControl object

Adding support for touch events

Implementing an unwind method for the Cancel button

Creating ReviewFormViewController

Summary

Getting Started with Cameras and Photo Libraries

Getting Started with Cameras and Photo Libraries

Technical requirements

Understanding filters

Creating a scrolling list of filters

Getting permission to use the camera or photo library

Summary

Understanding Core Data

Understanding Core Data

Technical requirements

Introducing Core Data

Implementing Core Data components for your app

Creating ReviewDataManager

Summary

Saving and Loading from Core Data

Saving and Loading from Core Data

Technical requirements

Understanding how saving and loading works

Updating ReviewFormViewController to save reviews

Updating PhotoFilterViewController to save photos

Displaying saved reviews and photos on the Restaurant Detail screen

Calculating a restaurant's overall rating

Summary

Section 4: Features

Section 4: Features

Getting Started with Dark Mode

Getting Started with Dark Mode

Technical requirements

Turning on Dark Mode in the simulator

Updating the Launch screen to work with Dark Mode

Updating the Explore screen to work with Dark Mode

Updating the Restaurant List screen to work with Dark Mode

Updating the Restaurant Detail screen to work with Dark Mode

Summary

Getting Started with Mac Catalyst

Getting Started with Mac Catalyst

Technical requirements

Cleaning up the design

Updating the app to work on iPad

Updating the app to work on macOS

Summary

Getting Started with SwiftUI

Getting Started with SwiftUI

Technical requirements

Creating a SwiftUI project

Working with text

Combining Views using Stacks

Working with images

Using UIKit and SwiftUI Views together

Composing the Restaurant Detail screen

Summary

Getting Started with Sign In with Apple

Getting Started with Sign In with Apple

Technical requirements

Adding a login screen

Displaying a Sign in with Apple button

Implementing delegate methods and button actions

Passing user information to ExploreViewController

Summary

Testing and Submitting Your App to the App Store

Testing and Submitting Your App to the App Store

Technical requirements

Getting an Apple Developer account

Generating a certificate signing request

Creating development and distribution certificates

Registering an App ID

Registering your devices

Creating provisioning profiles

Creating icons for your app

Creating screenshots for your app

Creating an App Store listing

Creating an archive build

Completing the information in App Store Connect

Testing your app

Summary

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Saving and Loading from Core Data

Your app is almost done! In the previous chapter, you implemented Core Data components for your app, but you can't use the Review Form and Photo Filter screens to save reviews and photos yet. Tapping the Save button in the Review Form screen just prints the contents of the fields to the Debug area, and tapping the Save button in the Photo Filter screen doesn't do anything.

In this chapter, you will complete the implementation of the Save buttons, and load saved reviews and photos for display in the Restaurant Detail screen. A lot of the setup has already been done and, mostly, you'll be using methods you created earlier.

You'll start by learning the mechanism used to save reviews and photos for a particular restaurant using the restaurant identifier.Next, you'll modify the RestaurantItem class with a property to hold the...

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