SwiftUI Apprentice: Beginning iOS Programming With SwiftUI. 2 Ed

Book License....14

What You Need....16

Book Source Code & Forums....17

About the Authors....19

About the Editors....19

How to Read This Book....20

Chapter 1: Checking Your Tools....22

Getting Started....23

Creating a New Xcode Project....25

A Quick Tour of Xcode....29

ContentView.swift....33

Creating a New SwiftUI View File....40

What Else is in Your Project?....44

Xcode Settings....45

Running Your Project....53

Key Points....61

Chapter 2: Planning a Paged App....62

Making Lists: Views & Actions....63

Creating Pages....65

Grouping Files....72

Passing Parameters....74

Looping....77

Key Points....87

Where to Go From Here?....87

Chapter 3: Prototyping the Main View....88

Creating the Exercise View....89

Creating the Header View....91

Creating the Exercise Structure....104

Playing a Video....108

Creating Timer, Buttons & Rating....112

Challenges....119

Key Points....120

Where to Go From Here?....120

Chapter 4: Prototyping Supplementary Views....121

Laying Out the History View....122

Structuring HistoryView Data....127

Dismissing HistoryView....131

Laying Out the Welcome View....134

Challenge....147

Key Points....149

Where to Go From Here?....149

Chapter 5: Moving Data Between Views....150

Managing Your App’s Data....151

Using State & Binding Properties....152

Setting & Tapping Images....159

Showing & Hiding Modal Sheets....164

One More Thing....170

Key Points....172

Chapter 6: Observing Objects....173

Showing/Hiding the Timer....174

Using an EnvironmentObject....182

Challenge....188

Key Points....188

Chapter 7: Saving Settings....189

Data Persistence....190

Saving Ratings to UserDefaults....190

Data Directories....192

Swift Dive: Strings....200

Thinking of Possible Errors....205

Multiple Scenes....207

Apps, Scenes and Views....210

Restoring Scene State With SceneStorage....211

Key Points....214

Chapter 8: Saving History Data....215

Using Optionals....216

Debugging HistoryStore....219

Swift Error Checking....225

Alerts....226

Saving History....229

Property List Serialization....234

Ignoring the Loading Error....238

Key Points....240

Chapter 9: Refining Your App....241

Neumorphism....242

Creating a Neumorphic Button....243

Styles....244

Abstracting Your Button....248

The Embossed Button....251

@ViewBuilder....254

ViewBuilder Container View....259

Designing WelcomeView....262

Gradients....265

Challenge....271

Key Points....272

Chapter 10: Working With Datasets....273

Accumulating Data....276

Lists....279

Adding Data to the List....285

Charts....294

Privacy....306

Challenge....307

Key Points....308

Where to Go From Here?....308

Chapter 11: Managing Data With Property Wrappers....309

Getting Started....310

Tools for Managing Data....311

Managing UI State Values....313

Accessing Environment Values....320

Managing Model Data Objects....322

Wrapping Up Property Wrappers....328

Key Points....331

Chapter 12: Apple App Development Ecosystem....332

A Brief History of SwiftUI....333

SwiftUI vs. UIKit....334

Apple Developer....337

Housekeeping & Trouble-Shooting....347

Key Points....354

Chapter 13: Outlining a Photo Collage App....356

Initial App Idea....357

Creating the Project....358

Creating the First View for Your Project....359

Refactoring the View....360

Transitioning From List to Card....363

The Navigation Toolbar....365

The Bottom Toolbar....367

Adding Modal Views....373

Challenge....377

Key Points....378

Chapter 14: Gestures....379

Creating the Resizable View....380

Creating Transforms....381

Creating a Drag Gesture....383

Creating a Rotation Gesture....387

Creating a Scale Gesture....391

Creating Custom View Modifiers....392

Other Gestures....398

Type Properties....399

Challenge....404

Key Points....405

Where to Go From Here?....405

Chapter 15: Structures, Classes & Protocols....406

Data Structure....407

Value and Reference Types....408

Swift Dive: Structure vs Class....409

Creating the Card Store....410

Class Inheritance....412

Protocols....413

The Preview Data....416

Listing the Cards....417

Mutability....420

Understanding @State and @Binding Property Wrappers....426

Key Points....432

Where to Go From Here?....432

Chapter 16: Adding Assets to Your App....433

The Asset Catalog....434

Launch Screen....440

Adding Sticker Images to Your App....445

Using Lazy Grid Views....456

Challenges....462

Key Points....463

Where to Go From Here?....463

Chapter 17: Adding Photos to Your App....464

The PhotosUI Framework....465

The PhotosPicker View....465

The Transferable Protocol....470

Drag and Drop From Other Apps....475

Pasting From Another App....482

Adding a Pop-up Menu....484

Challenge....491

Key Points....492

Chapter 18: Paths & Custom Shapes....493

The Starter Project....494

Shapes....494

Paths....496

Strokes and Fills....504

Selecting an Element....506

Associated Types....509

Adding the Frame Picker Modal to the Card....514

Challenges....521

Key Points....523

Chapter 19: Saving Files....524

The Starter Project....525

The Saved Data Format....525

When to Save the Data....526

JSON Files....529

Codable....529

Encoding and Decoding Custom Types....533

Loading Cards....542

Creating new Cards....544

Challenges....547

Key Points....550

Chapter 20: Delightful UX — Layout....551

The Starter app....552

Designing the Cards List....553

Layout....555

Adding a Lazy Grid View....559

Scaling the Card to fit the Device....569

Alignment....576

Challenges....579

Key Points....581

Chapter 21: Delightful UX — Final Touches....582

The Starter Project....583

Animated Splash Screen....583

SwiftUI Animation....588

Animated Transitions....594

Supporting Multiple View Types....597

Sharing the Card....600

Challenges....607

Key Points....610

Where to Go From Here?....610

Chapter 22: Lists & Navigation....612

Getting Started....613

List....613

NavigationStack....614

Using the Internet....617

navigationDestination....622

Using Custom Colors....630

One Last Thing....633

Key Points....637

Chapter 23: Just Enough Web Stuff....638

Servers & Resources....639

REST API....641

Sending & Receiving HTTP Messages....642

Exploring metmuseum.org....646

POST Request & Authentication....652

Key Points....656

Chapter 24: Downloading Data....657

Getting Started....658

URLSession....658

Creating a REST Request URL....660

Sending the Request With URLSession....665

Decoding JSON....666

Downloading Objects....670

Downloading Data in Your App....671

Showing a Progress View....683

Key Points....684

Chapter 25: Widgets....685

Getting Started....686

WidgetKit....686

Adding a Widget Extension....687

Creating Entries From Your App’s Data....694

Creating Widget Views....697

Providing a Timeline Of Entries....706

Deep-Linking Into Your App....715

A Few Last Things....719

Key Points....721

Conclusion....722

You’ve heard about Apple’s hot new declarative user interface SDK — SwiftUI — and are ready to try your hand at iOS development. But, you have no idea where to begin.

SwiftUI Apprentice to the rescue! This book will guide you through the first steps of your journey as you learn to build beautiful iOS apps.

Who This Book Is For

This book for developers who are new to iOS and SwiftUI who are looking for a step-by-step path to learning.

Topics Covered in SwiftUI Apprentice

• Using Xcode: Learn how to use Xcode — Apple’s integrated development environment — to code, build and debug your iOS apps.
• Planning and Prototyping: Learn how to plan and prototype apps using SwiftUI. Once you’re happy with the prototype, you’ll fill out the implementation into a full-featured app with a beautiful, professionally-designed user interface.
• Managing Assets: Discover how to manage app assets, such as colors and images, so your app looks good on all iOS devices from the smallest iPod Touch to the largest iPad.
• SwiftUI Data Flow: See how to manage data within a SwiftUI app so the user interface updates automatically as that data changes.
• Data Persistence: Explore multiple strategies for persisting an app’s data. Understand the pros and cons of several approaches so you can decide the best solution for your own apps.
• Networking: Learn to access REST APIs so your app can use internet resources to enhance your app’s user experience.

One thing you can count on: After reading this book, you’ll be prepared to create your own iOS apps using SwiftUI.