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.

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Table of Contents (33 chapters)
Preface
Preface
Who this book is for
What this book covers
To get the most out of this book
Get in touch
1
Section 1: Swift
Section 1: Swift
Free Chapter
2
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
3
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
4
Conditionals and Optionals
Conditionals and Optionals
Technical requirements
Introducing conditionals
Introducing optionals
Summary
5
Range Operators and Loops
Range Operators and Loops
Technical requirements
Range operators
Loops
Summary
6
Collection Types
Collection Types
Technical requirements
Understanding arrays
Understanding dictionaries
Understanding sets
Summary
7
Functions and Closures
Functions and Closures
Technical requirements
Understanding functions
Understanding closures
Summary
8
Classes, Structures, and Enumerations
Classes, Structures, and Enumerations
Technical requirements
Understanding classes
Understanding structures
Understanding enumerations
Summary
9
Protocols, Extensions, and Error Handling
Protocols, Extensions, and Error Handling
Technical requirements
Understanding protocols
Understanding extensions
Exploring error handling
Summary
10
Section 2: Design
Section 2: Design
11
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
12
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
13
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
14
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
15
Section 3: Code
Section 3: Code
16
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
17
Getting Data into Collection Views
Getting Data into Collection Views
Technical requirements
Understanding model objects
Displaying data in a collection view
Summary
18
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
19
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
20
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
21
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
22
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
23
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
24
Understanding Core Data
Understanding Core Data
Technical requirements
Introducing Core Data
Implementing Core Data components for your app
Creating ReviewDataManager
Summary
25
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
26
Section 4: Features
Section 4: Features
27
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
28
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
29
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
30
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
31
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
32
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Summary

In this chapter, you completed the implementation of the Photo Filter screen.

You imported FilterData.plist, a .plist file containing the filters you want to use, and created FilterManager, a data manager, to read the .plist file and populate an array of FilterItem objects. You created a protocol, ImageFiltering, with a method to apply filters to images.

Then, you created FilterCell and PhotoFilterViewController in order to manage the collection view cells and the Photo Filter screen, and implemented the image picker delegate protocol, which allows you to get pictures from the camera or photo library. Finally, you added code to PhotoFilterViewController to apply a selected filter to a picture. Now, the user can tap the Camera button in the Photo Filter screen, select a photo and apply a filter to it.

Now, you know how to apply filters to photos, as well as how to import...

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