SwiftUI For Dummies

The simplest way to create world-class apps

Have a unique app idea but worried you don't quite have the coding skills to build it? Good news: You can stop fretting about someone beating you to market with the same idea and start work right now using SwiftUI. SwiftUI is a gateway app development framework that has become one of the best ways for fledgling developers to get iOS apps off the ground without having to become a coding expert overnight.

SwiftUI For Dummies makes that process even faster, providing a friendly introduction to the SwiftUI and Swift programming language and helping you feel right at home creating and building with playgrounds. The book also covers the frameworks and APIs that make it so easy to create smooth, intuitive interfaces--just dive right in and have fun!

• Combine projects into workspaces

• Employ Xcode editing tools

• Use constants and variables

• Test your code on iOS Simulator

Time is of the essence, and with SwiftUI For Dummies, it's also on your side. Get going with this friendly guide today, and you'll be celebrating the successful launch of your app way before you thought possible!

Auteur

Wei-Meng Lee (Singapore) is founder of Developer Learning Solutions, a firm specializing in hands-on training for software developers. He teaches courses in mobile development, blockchain, machine learning, and AI. He is author of a number of books, including Beginning Swift Programming (Wiley).

Résumé

The simplest way to create world-class apps

Have a unique app idea but worried you don't quite have the coding skills to build it? Good news: You can stop fretting about someone beating you to market with the same idea and start work right now using SwiftUI. SwiftUI is a gateway app development framework that has become one of the best ways for fledgling developers to get iOS apps off the ground without having to become a coding expert overnight.

SwiftUI For Dummies makes that process even faster, providing a friendly introduction to the SwiftUI and Swift programming language and helping you feel right at home creating and building with playgrounds. The book also covers the frameworks and APIs that make it so easy to create smooth, intuitive interfacesjust dive right in and have fun!

• Combine projects into workspaces
• Employ Xcode editing tools
• Use constants and variables
• Test your code on iOS Simulator
  Time is of the essence, and with SwiftUI For Dummies, it's also on your side. Get going with this friendly guide today, and you'll be celebrating the successful launch of your app way before you thought possible!

Contenu

Introduction 1

About This Book 1

Foolish Assumptions 2

Icons Used in This Book 2

Beyond the Book 3

Where to Go from Here 3

Part 1: Getting Started with Swift and SwiftUI 5

Chapter 1: Introducing SwiftUI 7

Understanding What SwiftUI Is 7

Getting the Tools 11

Hello, SwiftUI 12

Automatically previewing your user interface using the canvas 14

Working with Live Preview 18

Generating different previews 19

The Gory Details 21

Info plist 22

AppDelegate swift 22

SceneDelegate swift 23

Chapter 2: Basics of the Swift Programming Language 25

Basic Swift Syntax 26

Constants 26

Variables 27

Strings 27

Comments 27

Basic Data Types 28

Integers 28

Floating-point numbers 29

Booleans 29

Tuples 30

Arrays 30

Retrieving elements from an array 31

Inserting elements into an array 31

Modifying elements in an array 31

Appending elements to an array 31

Removing elements from an array 32

Dictionaries 32

Retrieving elements from a dictionary 32

Modifying an item in a dictionary 33

Removing an item from a dictionary 33

Optional Types 33

Working with implicitly unwrapped optionals 35

Using optional binding 36

Unwrapping optionals using ? 36

Using the nil coalescing operator 37

Functions 38

Understanding input parameters 38

Returning a value 39

Flow Control 39

If-Else statement 40

Ternary conditional operator 40

Switch statement 40

Looping 41

For-In loop 42

While loop 42

Repeat-While loop 42

Control transfer statements 42

Range operators 43

Structures 43

Memberwise initializers 44

Structures as value types 45

Classes 47

Defining a class 47

Understanding properties 47

Using methods in classes 49

Trying out the self property 50

Closures 51

Understanding closures 51

Using functions as closures 52

Assigning closures to variables 52

Writing closures inline 53

Understanding type inference 53

Using shorthand argument names 54

Working with the operator function 54

Using trailing closures 55

Protocols 55

Defining and using a protocol 56

Conforming to a protocol 56

Using the Codable protocol 57

Using the some keyword 59

Part 2: Understanding the Basics of SwiftUI 61

Chapter 3: Getting Started with the Basics of SwiftUI 63

Taking a Look at SwiftUI Views 63

Conforming to the View protocol 64

Using modifiers 66

Stacking modifiers 66

Using the Inspector 67

Displaying an Image 70

Using modifiers on the Image view 72

Resizing images 73

Displaying a Button 75

Customizing the button 76

Adding actions 77

Stacking the Views 78

VStack 79

HStack 80

Putting on the Finishing Touches 85

Chapter 4: Handling User Inputs and Custom Views 87

Looking at Input Views 87

TextField 88

SecureField 92

Toggle 93

Slider 94

Stepper 98

Picker 100

Composing Custom Views 103

Composing the custom view 104 Using the custom view 111&...