Adobe Flash Professional CS3 Manuale Utente Scaricare il pdf (Pagina 215)

FLASH CS3

User Guide

209

Types of symbols

EachsymbolhasauniqueTimelineandStage,completewithlayers.Youcanaddframes,keyframes,andlayerstoa

symbol Timeline, just as you can to the main Timeline. When you create a symbol you choose the symbol type.

• Use graphic symbols for static images and to create reusable pieces of animation that are tied to the main

Timeline. Graphic symbols operate in sync with the main Timeline. Interactive controls and sounds won’t work

in a graphic symbol’s animation sequence. Graphic symbols add less to the FLA file size than buttons or movie

clips because they have no timeline.

• Use button symbols to create interactive buttons that respond to mouse clicks, rollovers, or other actions. You

define the graphics associated with various button states, and then assign actions to a button instance. For more

information, see Handling events in Learning ActionScript 2.0 in Adobe Flash or Handling events in Programming

ActionScript 3.0.

• Use movie clip symbols to create reusable pieces of animation. Movie clips have their own multiframe

Timeline that is independent from the main Timeline—think of them as nested inside a main Timeline that can

containinteractivecontrols,sounds,andevenothermovieclipinstances.Youcanalsoplacemovieclipinstances

inside the Timeline of a button symbol to create animated buttons. In addition, movie clips are scriptable with

ActionScript™.

• Use font symbols to export a font and use it in other Flash documents.

Flash provides built-in components, movie clips with defined parameters, that you can use to add user interface

elements, such as buttons, check boxes, or scroll bars, to your documents. For more information, see About compo-

nents in Using ActionScript 2.0 Components, or About ActionScript 3.0 components in Using ActionScript 3.0 Compo-

nents.

Note: To preview animation in component instances and scaling of 9-slice-scaled movie clips in the Flash authoring

environment, select Control > Enable Live Preview.

See also

“Embed and share fonts” on page 269

Create symbols

You can create a symbol from selected objects on the Stage, create an empty symbol and make or import the content

in symbol-editing mode, and create font symbols in Flash. Symbols can contain all the functionality that Flash,

including animation.

Using symbols that contain animation lets you create Flash applications with a lot of movement while minimizing

file size. Consider creating animation in a symbol that has a repetitive or cyclic action—the up-and-down motion of

a bird’s wings, for example.

To add symbols to your document, use shared library assets during authoring or at runtime.

A tutorial entitled Create Symbols and Instances is available on the Flash Tutorials web page at

www.adobe.com/go/learn_fl_tutorials. Download and decompress the Tutorials zip file and navigate to the Basic

Tasks\Create Symbols and Instances directory.

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Adobe Flash Professional CS3 Manuale Utente Pagina 215