Apress Learn HTML5 and JavaScript for iOS (2012).pdf

For your convenience Apress has placed some of the front

matter material after the index. Please use the Bookmarks

and Contents at a Glance links to access them.

Contents at a Glance

Contents.................................................................................................................. vii

About the Author ................................................................................................. xxix

About the Technical Reviewer ............................................................................. xxix

Preface ................................................................................................................. xxx

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Chapter 1: Getting Started ................................................................................... 1

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Chapter 2: HTML5 in Short ................................................................................. 21

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Chapter 3: CSS3 and iOS Styling ........................................................................ 41

■ Chapter 4: JavaScript and APIs ......................................................................... 65

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Chapter 5: Mobile Frameworks.......................................................................... 85

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Chapter 6: Usability, Navigation, and Touch .................................................... 103

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Chapter 7: GPS and Google Maps..................................................................... 121

■ Chapter 8: Animation and Effects .................................................................... 141

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Chapter 9: Canvas ............................................................................................ 157

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Chapter 10: Audio and Video............................................................................ 175

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Chapter 11: Integrating with Native Services .................................................. 185

■ Chapter 12: Offline Apps and Storage .............................................................. 195

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Chapter 13: Mobile Testing .............................................................................. 203

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Chapter 14: Advanced Topics .......................................................................... 219

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Chapter 15: Going Native with PhoneGap ........................................................ 229

■ Appendix: Companion Site References ............................................................ 249

Index..................................................................................................................... 263

C H A P T E R 1

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Getting Started

Congratulations! You are building your first web application for your iOS device (iPhone, iPad, or iPod

Touch) using HTML5 and JavaScript.

You might think that you can pick up one of your HTML or JavaScript books from years past and

then just scale it down to the size of your target device and you’ll be good to go. You’d be wrong. A lot

has changed.

In this chapter we lay the groundwork for building a mobile web app. Here we cover things like

getting familiar with your browser, setting up your mobile project, architecting the site, and creating a

site map as well as selecting the tools you’ll use to build it.

All you need is an idea, and I’ll help you take care of the rest.

You purchased this book to get started building a mobile web app. I won’t beat around the bush and

tell you about the history of the Internet or the history of browsers. Instead, let’s just jump in.

Your Browser (Mobile Safari)

The browser we’ll focus on is Mobile Safari—a WebKit-based browser engine that does an excellent job

of parsing HTML5 and interpreting JavaScript.

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Note Browsers use different rendering engines. Safari and Google Chrome use WebKit, Opera uses Presto,

Firefox uses Gecko, and Internet Explorer uses Trident. In later chapters we’ll need to use specific features of

WebKit to achieve a more native-looking mobile web application.

Mobile Safari acts and renders in many ways similar to regular Safari, but it has a smaller screen, of

course, and responds to gestures and touches as opposed to clicks. It also has noticeable performance

differences and does not support Adobe Flash.

One of mobile Safari’s most important screens is its Settings screen. You can get to it by clicking on

Settings, and then Safari on the iPhone or iPad home screen. You’ll see a screen like the one shown in

Figure 1-1.

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