iOS Web设计与开发实战：HTML5、CSS3及JavaScript指南

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《Apress.Pro.iOS.Web.Design.and.Development.HTML5.CSS3.and.JavaScript》是一本专业指南，专为iOS开发人员和设计师提供深入学习HTML5、CSS3和JavaScript在移动Web设计与开发中的应用。作者Andrea Picchi以其丰富的经验和专业知识，引领读者探索如何利用Safari浏览器及其最新特性，打造高效且兼容的跨平台用户体验。本书的核心内容涵盖了以下几个关键知识点： 1. **iOS Web设计与开发**：书中首先介绍针对iOS平台的Web设计原则，包括响应式设计、触控优化和用户体验设计，帮助开发者理解如何将网站设计转化为适应移动设备的界面。 2. **HTML5基础知识**：讲解HTML5的新特性，如语义化标签、多媒体支持（如视频和音频）、离线存储以及拖放功能等，这些都是构建现代Web应用的基础。 3. **CSS3技术**：深入剖析CSS3的革新特性，如动画、转换效果、3D变换、媒体查询和选择器的增强，使网页更具吸引力和交互性。 4. **JavaScript进阶**：本书不仅涉及基础的JavaScript编程，还包括ES6新特性、异步编程、DOM操作、AJAX、以及与jQuery或Vue.js等库的集成，提升开发者的动态内容处理能力。 5. **Safari技术特性和优化**：特别关注如何利用Safari浏览器的优势，如WebKit渲染引擎、Web Inspector工具以及性能优化技巧，确保在iOS设备上的最佳性能。 6. **版权和法律问题**：书中还包含了关于版权保护的必要信息，提醒读者在使用和分享书中的内容时尊重知识产权，避免无意侵权。通过阅读《Pro iOS Web Design and Development: HTML5, CSS3, and JavaScript with Safari》，读者不仅能掌握最新的Web开发技术，还能学习到在实际项目中将这些技术应用于iOS平台的有效策略，从而提升自己的职业竞争力。

xiv

Preface

“A journey of a thousand miles begins with a single step . . .”

—Lao-Tzu

Mobile Device Evolution

These are exciting times for those who live and work with technology every day, whether they are

young people who have been using technology since birth, or, like many others, have had to

adapt to it.

It is an exciting moment because in recent years there is no other example of technology that

has changed our lives so dramatically as has the evolution of the mobile device.

Since in knowing the past you’ll be more prepared to understand the present and help create

the future, in this book we’ll precede our discussion of how to get there with a short history of

smartphones, with our beloved iPhone or iPad in hand.

Humble Beginnings: The Early Mobile Web

Everything started in 1908, when Nathan B. Stubblefield of Murray, Kentucky was issued the first

USpatent for a wireless telephone.

Forty years later, the zero generation (0G) of mobile telephones was introduced. Mostly used

as car phones, they were meant to connect mobile users in cars to the fixed public telephone

network.

The zero generation was not officially categorized as mobile device technology since it did

not support the automatic change of channel frequency during calls (Handover), which would

allow the user to move from one cell (the present-day radio base station covered area) to another.

■ PREFACE

xvii

NOTE: A channel access method allows several terminals connected to the same multi-point

transmission medium to transmit over and receive to share its capacity.

Fundamental forms of channel access schemes are as follows:

■ FDMA: Frequency division multiple access

■ TDMA: Time division multiple access

■ CDMA: Code division multiple access

■ SDMA: Space division multiple access

GSM networks pioneered low-cost implementation of the “Short Message Service” (SMS),

also known as text messaging, which has since been supported on other mobile phone standards

as well. The new GSM standard also includes a worldwide emergency telephone number

feature.This three-digit number is localized, and some countries have a different emergency

number for each of their various emergency services.A few common numbers are 112, 999, and

911.

In the 1990s, along with the new way of transmitting information, a new generation of small

100–200g handheld devices started replacing the brick-sized phones. This change was made

possible thanks to technological advancements that included smaller batteries and more energy-

efficient electronics. The 1990s were the glory years of Motorola, Inc. and itsfamous MicroTAC

phone, which was released in 1989 and remained a status symbol for almost a decade.

In 1997, the GSM system was extended with a packet data capability by the new GPRS

(general packet radio service), and again in 1999 with a higher-speed data transmission protocol

called EDGE (Enhanced Data Rates for GSM Evolution). Those two new versions of GSM protocol

were called 2.5G and 2.75G networks, respectively.

In the same year, Nokia launched 7110, the first terminal with WAP (Wireless Application

Protocol), which for the first time permitted Internet access directly from the phone. “A small

step for a protocol but a giant leap for mankind.”

NOTE: WAP 1.0 standard, released in 1998, describes a complete software stack for mobile

Internet access. Nokia was also a co-founding member of the WAP standard.

A WAP browser provides all the basic service of a computer-based web browser but is simplified

to operate within the restrictions of a mobile phone. Users can connect to WAP sites written in or

dynamically converted to WML (Wireless Markup Language) and access them via the WAP

browser.

After having released itsfirst phone in 1992 (the Nokia 1011), in the 2000s Nokia took control

of the mobile devices market from Motorola and, with 1.2 billion phones in use and more than

806 different devices made and sold, still leads it today.

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