MACROMEDIA FLASH 8-DEVELOPING FLASH LITE 2.X Manual do Utilizador descarregar pdf (Página 11)

Adobe Flash CS3 Classroom in a Book

Lesson 7: ActionScript Basics

Lesson 7 introduces ActionScript 3.0, the scripting

language that extends Flash functionality and enables

interactivity in Flash projects. Students who haven’t

worked with scripting languages before may initially

be intimidated and confused by ActionScript, which is

an object-oriented scripting language similar to

JavaScript. This lesson introduces basic scripting

concepts, terminology, and syntax, as well as speciﬁc

ActionScript coding.

About ActionScript

The ActionScript scripting language lets you add com-

plex interactivity, playback control, and data display

to your application. You can add ActionScript in the

authoring environment by using the Actions panel.

ActionScript follows its own rules of syntax, reserved

keywords, and lets you use variables to store and re-

trieve information. ActionScript includes a large library

of built-in classes that let you create objects to perform

many useful tasks. For detailed information on Ac-

tionScript, see Programming ActionScript 3.0, Learning

ActionScript 2.0 in Adobe Flash, or the ActionScript

Language References, all available in Flash Help.

You don’t need to understand every ActionScript ele-

ment to begin scripting; if you have a clear goal, you

can start building scripts with simple actions.

Because there are multiple versions of ActionScript,

and multiple ways of incorporating it into your Flash

document ﬁles, there are several different ways to learn

ActionScript.

Flash Help describes the graphical user interface for

working with ActionScript. This interface includes the

Actions panel, Script window, Script Assist mode, Behav-

iors panel, Output panel, and Compiler Errors panel.

These topics apply to all versions of ActionScript.

Other ActionScript documentation available in Flash

Help will help you learn about the individual versions

of ActionScript; see Programming ActionScript 3.0,

Learning ActionScript 2.0 in Adobe Flash, Developing

Flash Lite 1.x Applications or Developing Flash Lite 2.x

Applications. For information about the ActionScript

vocabulary, see the ActionScript Language Reference for

the version you are working with.

For video tutorials about ActionScript 3.0, the Flash

workﬂow, and components, see the following:

• Getting started with ActionScript 3.0: www.adobe.

com/go/vid0129

• Creating interactivity with ActionScript 3.0:

www.adobe.com/go/vid0130

Tutorial videos are also included on the Adobe Flash

CS3 Professional Classroom in a Book CD. In particu-

lar, see the ScriptAssist.mov ﬁle from Lynda.com.

Adding a stop action

Students have had some experience with ActionScript

and the Actions panel in earlier lessons because they’ve

added stop actions. Stop actions are very simple; they

stop the movement in the Timeline and prevent ﬁles

from looping.

As you discuss stop actions, talk about the role of stop

actions added in earlier lessons. Remove a stop action

from the end ﬁle of an earlier lesson and preview the

movie. Discuss what happens when the stop ﬁle is no

longer there. In most cases, the movie or some part of

the movie repeats.

LESSON 7

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