Coding iPhone Apps for Kids by Winquist, Gloria -- Read -- Imperial Library of Trantor

Index

Cover Page Title Page Copyright Page About the Authors About the Technical Reviewer About the Illustrator Brief Contents Contents in Detail Acknowledgments Introduction

Who Should Read This Book? What’s in This Book? The Companion Website Have Fun!

Part 1: Xcode and Swift

1 Hello, World!

Installing Xcode, Your Code Editor Your First App!

Introducing the Storyboard Adding User Interface Elements with the Object Library Saving Your Work

Running the App on a Real Device What You Learned

2 Learning to Code in a Playground

Constants and Variables

When to Use Constants vs. Variables Naming Constants and Variables

Data Types

Declaring Data Types Common Data Types Type Inference Transforming Data Types with Casting

Operators

Order of Operations Ordering Operations with Parentheses Compound Assignment Operators

What You Learned

3 Making Choices

Boolean Expressions

Is Equal and Is Not Equal Greater Than and Less Than Compound Boolean Expressions

Conditional Statements

if Statements switch Statements

What You Learned

4 Writing Code That Loops

Open the Debug Area Looping Through Ranges and Collections with for-in

Say Hello! Say Good Morning!

Testing Conditions with while Loops

Guess My Number Shrink Away

Which Loop to Use? Nesting and Scope

Nesting Blocks of Code Constant and Variable Scope

What You Learned

5 Keeping Your Programs Safe with Optionals

What Is an Optional? Creating Optionals

Unwrapping Optionals A Special Kind of Operator: ??

What You Learned

6 Storing Collections in Dictionaries and Arrays

Keeping Things in Order with Arrays

Using Mutable and Immutable Arrays Using Type Inference Accessing Items in an Array Watching the Range Adding Items to an Array Combining Arrays Removing Items from an Array Replacing Items in an Array Using Array Properties Looping Over an Array

Dictionaries Are Key!

Initializing a Dictionary Accessing Values in a Dictionary Adding Items to a Dictionary Removing Items from a Dictionary Replacing Items in a Dictionary Using Dictionary Properties Looping Over a Dictionary

What You Learned

7 Functions are a Party, and You’re Invited

In with the Input, Out with the Output Writing a Custom Function Functions Do Even More with Input Parameters

Making Party Invitations Inviting All Your Friends at Once Messaging Your Guests

Argument Labels

Adding a Custom Argument Label Removing an Argument Label

Return Values

Which Is the Bigger Box? Conditional Returns

What You Learned

8 Custom Classes and Structs

Making a Class

Writing a Class Definition Storing Information in Properties Creating an Instance of a Class Accessing the Properties of a Class Customizing Each Cake with Initializers Adding a Birthday Greeting Method Writing a Helper Method

A Special Property Called self Class Inheritance

Creating a Superclass Creating a Subclass Detecting the Data Type by Typecasting Refining the Data Type by Downcasting

Value Types and Reference Types Using Structs What You Learned

Part 2: Birthday Tracker

9 Creating Buttons and Screens on the Storyboard

An Outline of Your App Creating a New Xcode Project Adding the App Icon Displaying Your Friends’ Birthdays

Adding the Table View Controller Adding the Navigation Controller Adding a Button

Setting Up Control Inputs and Labels

Adding Your Friends’ Names and Birthdays Making Your App Look Perfect on Every Device with Auto Layout Adding Save and Cancel Buttons

What You Learned

10 Adding a Birthday Class and Handling User Input

The Birthday Class

Creating a New File Writing the Birthday Class

Programming User Input

Creating the Add Birthday View Controller Connecting Code to the Input Controls Connecting Your Code to the Storyboard Setting a Maximum Birthdate

Saving a Birthday

Hooking Up the Save Button Reading Text from a Text Field Getting a Date from a Date Picker Creating a Birthday

Adding the Cancel Button What You Learned

11 Displaying Birthdays

Making the Birthday List

Creating the Birthdays Table View Controller Adding Cells to the Table View Setting Up the Birthdays Table View Controller Displaying Birthdays in a Table View

Putting It All Together

Delegation Connecting the Two Controllers by Setting a Delegate

What You Learned

12 Saving Birthdays

Storing Birthdays in a Database

The Birthday Entity The Birthday Attributes The Application Delegate

Code Cleanup Adding More Features to Our App

Alphabetizing Birthdays Removing Birthdays

What You Learned

13 Getting Birthday Notifications

The User Notifications Framework

Registering for Local Notifications Scheduling a Notification Removing a Notification

What You Learned

Part 3: Schoolhouse Skateboarder

14 Setting the Stage

Where Do I Get Art and Sound Effects? Making Games with Xcode’s SpriteKit Creating the Game Project Adding Images The Scenery: Displaying a Background Image How It Will Be Played: Screen Orientation Sizing Images for Different Screen Resolutions What You Learned

15 Making Schoolhouse Skateboarder a Real Game

Our Hero, the Skateboarder

Creating a Skater Sprite Class Importing SpriteKit Adding Custom Properties to the Skater Class Creating an Instance of the Skater in the Scene Setting Up the Skater Seeing the Skater on the Screen Understanding SpriteKit’s Debugging Information

Hittin’ the Bricks

Creating Sidewalk Bricks Updating Sidewalk Bricks Filling the Screen with Bricks Leaving Gaps to Jump

The Game Loop

Tracking the Update Time Calculating Elapsed Time for Each Update Adjusting Scroll Speed Using the Elapsed Time Updating the Bricks

Up, Up, and Away—Making the Skater Jump

Using a Tap Gesture Recognizer Simulating Gravity in a Simple Way Checking for Landings

What You Learned

16 Using the Spritekit Physics Engine

Setting Up the Physics World Physics Bodies

Giving Shape to the Physics Bodies Setting Properties of Physics Bodies Giving the skater Sprite a Physics Body Adding Physics Bodies to Bricks

Contacts and Collisions

Handling Contacts and Collisions Responding to Contacts

Applying Forces to Physics Bodies Starting and Ending the Game

Starting the Game Ending the Game

What You Learned

17 Adjusting Difficulty, Collecting Gems, and Keeping Score

Speeding Things Up Adding Multilevel Platforms

Defining Multiple Brick Levels Changing How Bricks Spawn

Adding Gems to Collect

Spawning and Tracking the Gems Deciding When to Spawn a Gem Removing Gems Updating Gems Collecting Gems

Adding Scoring and Labels

Creating Labels Tracking the Score Updating Labels Updating the Player’s Score Making the Gems Valuable Tracking the High Score

Tweaking the Gameplay What You Learned

18 Game State, Menus, Sounds, and Special Effects

Tracking Game State Adding a Menu System

Creating the MenuLayer Class Displaying the Menu Layers When Needed Removing the Menu Layer

Making Sounds

Adding the Sound Files Playing the Sounds at the Right Time

Shooting Sparks What You Learned

Resources

Troubleshooting Errors Apple Documentation Xcode Keyboard Shortcuts iOS Simulator Keyboard Shortcuts Xcode Versions

Index

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