Book Image

iPhone JavaScript Cookbook

By : Arturo Fernandez Montoro
Book Image

iPhone JavaScript Cookbook

By: Arturo Fernandez Montoro

Overview of this book

<p>Undoubtedly, the iPhone is one of the most exciting mobile devices in the world. Its iOS is used in other Apple devices such as the iPad and iPod Touch. With this book you'll learn how to build and develop applications for these devices without applying Apple's burdensome and at times restrictive technologies. Just use your experience and knowledge combined with web front-end technologies like JavaScript to build quality web apps. Nobody will know you haven't used Objective-C and Cocoa.</p> <p>The <i>iPhone JavaScript Cookbook</i> offers a set of practical and clear recipes with a step-by-step approach for building your own iPhone applications applying only web technologies such as JavaScript and AJAX. Web developers won't need to learn a new programming language for building iOS applications with a native look and feel.</p> <p>The first part of the book introduces you to the world of iPhone applications. Understanding how it works is required for designing good user interfaces for this device. You will continue learning about how to apply multimedia features to your applications. Common features of web applications, such as AJAX and SQL, can also be applied to our iPhone applications. The third part of the book explains how to deal with specific features of iPhone such as the accelerometer. At the end, you learn how to offer additional features through external websites. With the <i>iPhone JavaScript Cookbook</i>, you will be able to develop outstanding web applications with a for Apple's mobile devices, offering your users all of the advantages of the native look and feel.</p>
Table of Contents (17 chapters)
iPhone JavaScript Cookbook
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Index

Storing data in session


Thanks to this recipe, you'll know how to use sessionStorage to store properties with values. It's very important to keep in mind the lifecycle of these properties. If the user closes the browser or cleans the HTTP session, our values stored in sessionStorage will be deleted.

The application for this recipe shows you how to store and read one property in sessionStorage. We are going to start by setting and displaying a property called today, which stores the current date using a format based on the value of another property set previously in localStorage. As you've seen in the previous recipe, lang is a property storing the language selected by the user. In this recipe, our application will read this property from localStorage and will set the suitable format for the today property based on it. For example, if the current date is June, 13th 2011 and the selected language is English, the value for today will be 6/13/2011. Otherwise, the result will be 13/6/2011.

Getting...