Sign In Start Free Trial

Book Overview & Buying
Table Of Contents

Swift Cookbook

By : Cecil Costa

5 (1)

Swift Cookbook

5 (1)

By: Cecil Costa

Overview of this book

If you are an experienced Objective-C programmer and are looking for quick solutions to many different coding tasks in Swift, then this book is for you. You are expected to have development experience, though not necessarily with Swift.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Sections

Conventions

Reader feedback

Customer support

Free Chapter

1. Getting Started with Xcode and Swift

1. Getting Started with Xcode and Swift

Introduction

Installing Xcode from the App Store

Downloading the Xcode image

Starting a Swift project

Using Swift project options

Creating conditional code

Adding a developer account

Compiling from the command line

Using Swift as an interpreter

Adding a control version system to an existing project

2. Standard Library and Collections

2. Standard Library and Collections

Introduction

Creating HTML manually

Printing your object description

Quizzing the user

Searching for perfect numbers

Sorting an array of products

Finding the way out

Working with sets

Creating your own set

Organizing a dinner room

3. Using Structs and Generics

3. Using Structs and Generics

Introduction

Creating an exam app

Checking the right answer

Avoiding copying of structs

Creating a generic array initializer

Creating a priority list

Creating a protocol for the priority queue

4. Design Patterns with Swift

4. Design Patterns with Swift

Introduction

Writing into a log file

Creating a factory of musical notes

Simulating a home automation

Delivering some pizzas

5. Multitasking

5. Multitasking

Introduction

Working of a device while you navigate

Creating an SEO app

Being aware of cyclones

Links on our website

6. Playground

6. Playground

Introduction

Creating the first playground

Watching some graphics

Watching the temperature

Stretching an image

Beautifying your text

Receiving JSONs

Dangerous moves

7. Swift Debugging with Xcode

7. Swift Debugging with Xcode

Introduction

The Tax income simulator

The best checker movement

Debugging with LLDB

Profiling an app

8. Integrating with Objective-C

8. Integrating with Objective-C

Introduction

Calling a cab

Hiring a van

Porting from one language to another

Replacing the UI classes

Upgrading the app delegate

Creating a framework

9. Dealing with Other Languages

9. Dealing with Other Languages

Introduction

Using your old address book

Compressing a message

Using assembly code with Swift

Sharing C++ code with Swift

10. Data Access

10. Data Access

Introduction

Creating an SQLite database

Checking where your IP is from

Tracking your phone activity

Controlling your stock

Voting devices

11. Miscellaneous

11. Miscellaneous

Introduction

The geekest keyboard

Time to take your pill

Adding effects to your photos

Being a film critic

Leaving breadcrumbs

Exchanging money

Index

Index

Searching for perfect numbers

Believe it or not, when computers were born as giant calculators, and until now, their main function was to do powerful calculation. Let's add a little bit of math to our Swift project to create an app that will look for the first perfect number and show it to the user.

The main question you probably have now is: what's a perfect number? A perfect number is a positive integer that is equal to the sum of its divisors. For example, 6 is a perfect number because if you sum its divisors (1 + 2 + 3), its result is 6.

In this recipe, we will learn how to use the range operators.

Getting ready

Let's start by creating a new Swift project called Chapter2 Perfect Number.

How to do it...

Follow these steps to search for perfect numbers:

Click on the storyboard and create a layout similar to the one shown here:

Now, let's link the text fields with the following properties:

    @IBOutlet var startText: UITextField!
    @IBOutlet var endText: UITextField!

Good...

CONTINUE READING

83

Tech Concepts

36

Programming languages

73

Tech Tools

Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.

Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.

50+ new titles added per month and exclusive early access to books as they are being written.

Swift Cookbook

Search

Your notes and bookmarks