快速入门：使用Parse与PhoneGap开发移动应用

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"《利用Parse与PhoneGap入门移动应用开发》(Apress, 2015)是一本专为设计师和初学者设计的指南，教你如何使用免费且开源的软件Parse和PhoneGap进行应用程序开发。这本书由经验丰富的作者编写，旨在用最简单的方法引导你快速入门，即使没有JavaScript、HTML和CSS的基础，也能逐步掌握关键概念。 PhoneGap，原名Cordova，是一个基于Web技术的移动应用开发框架，它允许开发者使用HTML、CSS和JavaScript编写跨平台的应用程序，而无需学习每个特定平台的原生开发语言。本书将带你从零开始，通过Facebook的Parse作为后端服务，学习如何构建高度定制的移动应用，如用户注册、消息传递、地理位置服务、地图视图等功能。章节内容覆盖广泛，从第一章的简介开始，介绍了PhoneGap的基本概念及其与Parse结合的价值。第二章到第十章分别深入讲解了如何在实际项目中运用PhoneGap和Parse，包括构建基本的PhoneGap应用、使用Facebook API进行身份验证、实现用户注册和消息功能、集成地理位置服务和显示地图、处理照片分享以及监控网络连接状态。每一步都力求简单易懂，适合设计师或对开发感兴趣但缺乏编程背景的人士。通过本书，读者可以轻松地从设计师转型为开发者，而且由于使用的是开源工具，开发成本低，部署速度快。无论你是想探索移动应用开发的世界，还是希望提升自己的技能，这本书都是一个高效的学习资源，让你能够迅速上手并开始使用Parse和PhoneGap开发自己的应用程序。"

CHAPTER 1 ■ INTRODUCTION

While some are more powerful and fully featured than others, the IDE you use is up to you. Some of our

recommendations include the following:

• Atom.io

• Sublime Text 2

• NotePad++

Any of these IDEs will get the job done. If you already use an editor you know and love, great! But if you

haven’t found one, here are some things to consider:

• Is it free? Is paying for one worth it?

• Are there plug-ins that can extend its functionality?

• Does it contain any built-in features like code collapsing, autofill, or syntax

highlighting?

What You Will Learn about PhoneGap and Parse

Chapter 2 will provide you with everything you need to begin application development with PhoneGap.

From installing and setting up, to previewing and editing an example application, to implementing

real-world scenarios that demonstrate some of PhoneGap’s core functionality, we’ll attempt to cover as

much of their API as possible.

We’ll also be covering some cool plug-ins that extend the functionality of your applications, as well as

some debugging and development tools that you can start using immediately.

Using Parse as our main data storage, we’ll be covering everything from creating an account to setting

up your first Parse application. As the book progresses, we’ll introduce some core features of Parse. We’ll be

covering the Parse JavaScript SDK, which we’ll tie into PhoneGap applications. This will enable you to do

things like take a picture using the native camera on a mobile device and saving it to a database.

Going Further

The code and concepts used for examples in this book can be applied to any PhoneGap or Parse application

you create. Because we are using the language of the web (HTML, JS, CSS), there is opportunity to build a

variety of different experiences for your users per application. For example:

• Storing media with Parse: audio, image, and video storage

• Accessing media content with PhoneGap

• Creating user accounts with Parse

• Sync Facebook accounts with your Parse app

• Using PhoneGap plug-ins to extend device features

• Structuring your application data using the Parse Data Browser

We are convinced that this book contains enough information to get you building applications that you

have only imagined. Aside from the hands-on projects that we’ll be walking you through, we encourage

you to take everything you learn and apply it to your next project.

www.it-ebooks.info

Chapter 2

Beginning PhoneGap

Configuring your Development Environment

In this chapter, you’ll learn the essentials of PhoneGap. First, we will walk you through the installation

process of PhoneGap and its dependencies. Then you’ll be creating, debugging, and testing your first

“Hello World” PhoneGap application.

We get underway with setting up your development environment for the two most popular mobile

platforms, iOS and Android. You’ll install the package manager for Node.js, which will lead to the PhoneGap

installation process.

Platform Setup and Restrictions

While PhoneGap is designed to use one codebase to handle multiple platforms, you still need to prepare

your system for each platform you wish to support. For example, with Android you’ll need to install the

Android SDK, with the Windows Phone you will need to install the Windows Phone SDK, and so forth.

Each platform may have further dependencies or operating system restrictions. For instance, you need

a Windows system to build Windows Phone applications and a Mac OS X system to build iOS applications.

While the Android SDK can run on Windows and Mac, it requires the installation of the Java Development

Kit (JDK). Requirements and installation procedures will be covered in the following sections.

Installing Node.js and Node Package Manager

Before installing PhoneGap and its dependencies, you need to install Node.js. Node.js is a server side

JavaScript programming environment used to build fast, scalable network applications. When Node.js is

installed on your computer, it includes a JavaScript package manager called node package manager (npm),

which we’ll be using to install PhoneGap and other tools.

Even though npm was intended for use with Node.js and JavaScript, it may be used for source files using

other programming languages as well. You can install JavaScript packages, called node modules, by using the

npm install <package-name> terminal command. Download Node.js from http://nodejs.org/download/

and follow the installation instructions.

Node.js is available for both Windows and Mac. To ensure you have installed Node.js properly, in your

terminal, run node -v. This should return the currently installed version of Node.js on your system.

www.it-ebooks.info

CHAPTER 2 ■ BEGINNING PHONEGAP

■ Note Setting up things like Certificates, Identifiers, and Provisioning Profiles (things you’ll need to

publish your applications) are outside of the scope of this book. For a complete guide on setting this up,

visit developer.apple.com/library/ios/documentation/IDEs/Conceptual/AppDistributionGuide/

MaintainingCertificates/MaintainingCertificates.html

Command Line Tools for Xcode

The Command Line Tools package allows you to do command-line development in OS X. PhoneGap uses

this package to build the iOS version of your application. For OS X 10.9 and greater, Xcode comes bundled

with all command-line tools.

If you’re using an older version of OS X, you can install the Command Line Tools package from the main

menu in Xcode. Select Preferences and then click the Downloads tab. From the Components panel, click

the Install button next to the Command Line Tools listing. If Xcode does not show an option to install the

package or if it’s missing for any other reason, you can download the package from the Apple Developers

downloads page at https://developer.apple.com/downloads. Note that in order to view the downloads

page, you must be logged in with your Apple Developer credentials.

iOS Launcher Packages

To be able to install and run PhoneGap applications using the iOS simulator or an iOS device from the

command line, you need to install two more JavaScript packages using npm. The command ios-deploy

launches iOS apps to a physical iOS device, and ios-sim executes the application using the iOS simulator

provided by Xcode. Install the packages via the following commands, adding the sudo prefix if needed.

The following code lines demonstrate two separate commands for installing the packages used for testing

PhoneGap applications.

npm install -g ios-sim

npm install -g ios-deploy

At this point, you should have everything you need for iOS development with PhoneGap. If you do not

wish to develop for Android, skip the next section and continue to PhoneGap Installation.

■ Note You don’t have to use Xcode as your code editor. You also don’t need to use it to build PhoneGap

applications; the latter happens using the command line. However, Xcode is a good tool for testing your

application on different types of iOS devices. You can download more iOS simulators using Xcode via Preferences

from the main menu (in the Downloads tab).

www.it-ebooks.info

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