Справочник Пользователя для Macromedia flash mx 2004-learning flash

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Work with Objects and Classes Using 

ActionScript 2.0

Classes are the blueprint for objects in Macromedia Flash MX 2004 and Macromedia Flash MX 
Professional 2004. All objects in Flash have an underlying class; for example, all movie clips have 
a method called 

getURL

, and 

getURL

 is defined in the class definition for a movie clip. Flash 

contains many predefined classes, such as the MovieClip class, the Array class, the Color class, 
and the CheckBox class. 

In this lesson, you’ll learn about creating and modifying classes. Specifically, you’ll learn how to 
accomplish the following tasks:

•

Create objects from existing classes 

•

Create a custom class 

•

Use datatyping with custom classes

•

Extend an existing class

Note: This lesson is designed for Flash developers who are familiar with basic Flash and 
ActionScript concepts.

Set up your workspace

First, you’ll view the finished files and set up your workspace to use an optimal layout for 
taking lessons.

1.

View the finished files. This lesson does not include start files. You can find finished files of 
handson1.fla, handson2.fla, handson3.fla, Product.as, and Drag.as, which are examples of the 
files that you’ll create in this lesson:

■

On Windows 2000 or XP, browse to boot drive\Documents and Settings\All 
Users\Application Data\Macromedia\Flash MX 2004\language\Configuration\HelpPanel\ 
HowDoI\BasicActionScript\finished_files.

Note: If the Application Data folder is hidden, you’ll need to change your Windows Explorer 
settings to see the folder.

■

On Windows 98, browse to boot drive\Windows\Application Data\Macromedia\Flash MX 
2004\language\Configuration\HelpPanel\HowDoI\BasicActionScript\finished_files.