Browse Library
Sign In Start Free Trial
Close icon Search icon
Account
Browse Library Advanced Search Sign In Start Free Trial

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying iOS 15 Programming for Beginners
  • Table Of Contents Toc
  • Feedback & Rating feedback
iOS 15 Programming for Beginners

iOS 15 Programming for Beginners

By : Ahmad Sahar, Craig Clayton
4.7 (10)
Buy this Book
close
close
iOS 15 Programming for Beginners

iOS 15 Programming for Beginners

4.7 (10)
By: Ahmad Sahar, Craig Clayton
Buy this Book

Overview of this book

With almost 2 million apps on the App Store, iOS mobile apps continue to be incredibly popular. Anyone can reach millions of customers around the world by publishing their apps on the App Store. iOS 15 Programming for Beginners is a comprehensive introduction for those who are new to iOS. It covers the entire process of learning the Swift language, writing your own app, and publishing it on the App Store. Complete with hands-on tutorials, projects, and self-assessment questions, this easy-to-follow guide will help you get well-versed with the Swift language to build your apps and introduce exciting new technologies that you can incorporate into your apps. You'll learn how to publish iOS apps and work with Mac Catalyst, SharePlay, SwiftUI, Swift concurrency, and much more. By the end of this iOS development book, you'll have the knowledge and skills to write and publish interesting apps, and more importantly, to use the online resources available to enhance your app development journey.
Table of Contents (32 chapters)
close
close
close
Preface
Icon
Preface
Icon
Who this book is for
Icon
What this book covers
Icon
To get the most out of this book
Icon
Download the example code files
Icon
Code in Action
Icon
Download the color images
Icon
Conventions used
Icon
Get in touch
Icon
Share Your Thoughts
1
Part 1: Swift
Icon
Part 1: Swift
Free Chapter
2
Chapter 1: Getting Familiar with Xcode
Icon
Chapter 1: Getting Familiar with Xcode
Icon
Technical requirements
Icon
Downloading and installing Xcode from the App Store
Icon
Understanding the Xcode user interface
Icon
Running the app in the iOS simulator
Icon
Using an iOS device for development
Icon
Summary
Icon
Invitation to join us on Discord
3
Chapter 2: Simple Values and Types
chevron up
Icon
Chapter 2: Simple Values and Types
Icon
Technical requirements
Icon
Understanding Swift playgrounds
Icon
Exploring data types
Icon
Exploring constants and variables
Icon
Understanding type inference and type safety
Icon
Exploring operators
Icon
Using the print() statement
Icon
Summary
4
Chapter 3: Conditionals and Optionals
Icon
Chapter 3: Conditionals and Optionals
Icon
Technical requirements
Icon
Introducing conditionals
Icon
Introducing optionals and optional binding
Icon
Summary
5
Chapter 4: Range Operators and Loops
Icon
Chapter 4: Range Operators and Loops
Icon
Technical requirements
Icon
Exploring Range operators
Icon
Exploring Loops
Icon
Summary
6
Chapter 5: Collection Types
Icon
Chapter 5: Collection Types
Icon
Technical requirements
Icon
Understanding arrays
Icon
Understanding dictionaries
Icon
Understanding sets
Icon
Summary
7
Chapter 6: Functions and Closures
Icon
Chapter 6: Functions and Closures
Icon
Technical requirements
Icon
Understanding functions
Icon
Understanding closures
Icon
Summary
8
Chapter 7: Classes, Structures, and Enumerations
Icon
Chapter 7: Classes, Structures, and Enumerations
Icon
Technical requirements
Icon
Understanding classes
Icon
Understanding structures
Icon
Understanding enumerations
Icon
Summary
9
Chapter 8: Protocols, Extensions, and Error Handling
Icon
Chapter 8: Protocols, Extensions, and Error Handling
Icon
Technical requirements
Icon
Understanding protocols
Icon
Understanding extensions
Icon
Exploring error handling
Icon
Summary
10
Part 2: Design
Icon
Part 2: Design
11
Chapter 9: Setting Up the User Interface
Icon
Chapter 9: Setting Up the User Interface
Icon
Technical requirements
Icon
Learning useful terms in iOS development
Icon
Touring the Let's Eat app
Icon
Creating a new Xcode project
Icon
Setting up a tab bar controller scene
Icon
Setting up the Launch screen
Icon
Summary
Icon
Invitation to join us on Discord
12
Chapter 10: Building Your User Interface
Icon
Chapter 10: Building Your User Interface
Icon
Technical requirements
Icon
Adding a collection view to the Explore screen
Icon
Connecting storyboard elements to outlets in a view controller
Icon
Configuring data source methods for the collection view
Icon
Adding a section header to the collection view
Icon
Configuring storyboard element sizes
Icon
Presenting a view modally
Icon
Summary
13
Chapter 11: Finishing Up Your User Interface
Icon
Chapter 11: Finishing Up Your User Interface
Icon
Technical requirements
Icon
Adding a table view to the Locations screen
Icon
Implementing the Restaurant List screen
Icon
Implementing the Restaurant Detail screen
Icon
Implementing the Map screen
Icon
Summary
14
Chapter 12: Modifying and Configuring Cells
Icon
Chapter 12: Modifying and Configuring Cells
Icon
Technical requirements
Icon
Modifying the Explore screen section header
Icon
Modifying the exploreCell collection view cell
Icon
Modifying the restaurantCell collection view cell
Icon
Configuring the locationCell table view cell
Icon
Summary
15
Part 3: Code
Icon
Part 3: Code
16
Chapter 13: Getting Started with MVC and Collection Views
Icon
Chapter 13: Getting Started with MVC and Collection Views
Icon
Technical requirements
Icon
Understanding the Model-View-Controller design pattern
Icon
Exploring controllers and classes
Icon
Summary
17
Chapter 14: Getting Data into Collection Views
Icon
Chapter 14: Getting Data into Collection Views
Icon
Technical requirements
Icon
Understanding model objects
Icon
Understanding .plist files
Icon
Creating a structure to represent a cuisine
Icon
Implementing a data manager class to read data from a .plist file
Icon
Displaying data in a collection view
Icon
Summary
18
Chapter 15: Getting Started with Table Views
Icon
Chapter 15: Getting Started with Table Views
Icon
Technical requirements
Icon
Understanding table views
Icon
Creating the LocationViewController class
Icon
Adding location data for the table view
Icon
Creating the LocationDataManager class
Icon
Summary
19
Chapter 16: Getting Started with MapKit
Icon
Chapter 16: Getting Started with MapKit
Icon
Technical requirements
Icon
Understanding and creating annotations
Icon
Adding annotations to a map view
Icon
Going from the Map screen to the Restaurant Detail screen
Icon
Organizing your code
Icon
Summary
20
Chapter 17: Getting Started with JSON Files
Icon
Chapter 17: Getting Started with JSON Files
Icon
Technical requirements
Icon
Getting data from JSON files
Icon
Using data from JSON files in your app
Icon
Configuring the MapDataManager instance to use data from the RestaurantDataManager instance
Icon
Storing a user-selected location
Icon
Passing location and cuisine information to the RestaurantListViewController instance
Icon
Summary
21
Chapter 18: Displaying Data in a Static Table View
Icon
Chapter 18: Displaying Data in a Static Table View
Icon
Technical requirements
Icon
Setting up outlets for the RestaurantDetailViewController class
Icon
Displaying data in the static table view
Icon
Passing data to the RestaurantDetailViewController instance
Icon
Summary
22
Chapter 19: Getting Started with Custom UIControls
Icon
Chapter 19: Getting Started with Custom UIControls
Icon
Technical requirements
Icon
Creating a custom UIControl subclass
Icon
Adding support for touch events
Icon
Implementing an unwind method for the Cancel button
Icon
Creating the ReviewFormViewController class
Icon
Summary
23
Chapter 20: Getting Started with Cameras and Photo Libraries
Icon
Chapter 20: Getting Started with Cameras and Photo Libraries
Icon
Technical requirements
Icon
Understanding filters
Icon
Creating model objects for the Photo Filter screen
Icon
Creating the ImageFiltering protocol
Icon
Creating classes for the Photo Filter screen
Icon
Getting permission to use the camera or photo library
Icon
Summary
24
Chapter 21: Understanding Core Data
Icon
Chapter 21: Understanding Core Data
Icon
Technical requirements
Icon
Introducing Core Data
Icon
Implementing Core Data components for your app
Icon
Understanding how saving and loading works
Icon
Updating the ReviewFormViewController class to save reviews
Icon
Updating the PhotoFilterViewController class to save photos
Icon
Displaying saved reviews and photos on the Restaurant Detail screen
Icon
Calculating a restaurant's overall rating
Icon
Summary
25
Part 4: Features
Icon
Part 4: Features
26
Chapter 22: Getting Started with Mac Catalyst
Icon
Chapter 22: Getting Started with Mac Catalyst
Icon
Technical requirements
Icon
Fixing user interface issues
Icon
Making your app run on all iOS devices
Icon
Updating the app to work on macOS
Icon
Summary
27
Chapter 23: Getting Started with SwiftUI
Icon
Chapter 23: Getting Started with SwiftUI
Icon
Technical requirements
Icon
Creating a SwiftUI Xcode project
Icon
Creating the Restaurant List screen
Icon
Adding model objects and configuring navigation
Icon
Using UIKit and SwiftUI Views together
Icon
Completing the Restaurant Detail screen
Icon
Summary
28
Chapter 24: Getting Started with Swift Concurrency
Icon
Chapter 24: Getting Started with Swift Concurrency
Icon
Technical requirements
Icon
Understanding Swift Concurrency
Icon
Examining an app without concurrency
Icon
Updating the app using async/await
Icon
Improving efficiency using async-let
Icon
Updating RestaurantListViewController to use async/await
Icon
Summary
29
Chapter 25: Getting Started with SharePlay
Icon
Chapter 25: Getting Started with SharePlay
Icon
Technical requirements
Icon
Understanding SharePlay
Icon
Exploring the ShareOrder app
Icon
Creating a custom Group Activity
Icon
Managing a group activity session
Icon
Testing SharePlay in the ShareOrder app
Icon
Summary
30
Chapter 26: Testing and Submitting Your App to the App Store
Icon
Chapter 26: Testing and Submitting Your App to the App Store
Icon
Technical requirements
Icon
Getting an Apple Developer account
Icon
Exploring your Apple Developer account
Icon
Submitting your app to the App Store
Icon
Testing your app
Icon
Summary
Icon
Why subscribe?
31
Other Books You May Enjoy
Icon
Other Books You May Enjoy
Icon
Packt is searching for authors like you

Exploring constants and variables

Now that you know about the simple data types that Swift supports, let's look at how to store them, so you can perform operations on them later.

You can use constants or variables to store data. Both are containers that have a name, but a constant's value can only be set once and cannot be changed after it has been set, whereas a variable's value can be changed at any time.

You must declare constants and variables before you use them. Constants are declared with the let keyword whereas variables are declared with the var keyword.

Let's explore how constants and variables work by implementing them in your playground. Follow these steps:

  1. Add the following code to your playground to declare three constants:
    let theAnswerToTheUltimateQuestion = 42 
let pi = 3.14159
let myName = "Ahmad Sahar"
  2. Click the Play/Stop button to run it.

In each case, a container is created and named, and the assigned value...

Unlock full access

Continue reading for free

A Packt free trial gives you instant online access to our library of over 7000 practical eBooks and videos, constantly updated with the latest in tech
Start a 7-day FREE trial
End of Section 5
Next Section

Create a Note

Modal Close icon
You need to login to use this feature.
notes
bookmark search playlist download
font-size

Change the font size

margin-width

Change margin width

day-mode

Change background colour

Close icon Search
Country selected
Close icon Your notes and bookmarks

Delete Bookmark

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Delete Note

Modal Close icon
Are you sure you want to delete it?
Cancel
Yes, Delete

Edit Note

Modal Close icon
Write a note (max 255 characters)
Cancel
Update Note

Confirmation

Modal Close icon
claim successful
Order Page Read Now

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY