Tài liệu Thiết kế flash với flash cs5 part 49 doc

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Chapter 12
By default, Flash embeds audio files directly into the published (.swf)
file. You have the option of loading audio files from a common Library.
This gives you the advantage of using the same sounds in several Flash
movies at the same time. For example, you create a Web site using
fifteen separate Flash movie files, and each one uses the same back-
ground music. Rather than embed the same sound fifteen times, you
can simply load the sound, when needed, from a common Library.
Shared libraries are simple Flash documents that are set up to share
their files between several Flash movies. The process is easy, and the
rewards are great, and you don't increase the file size of Flash movies
using shared Library elements. Once you've created and defined a
Flash document as a shared Library, you can use the items in other
Flash movies without increasing the size of the Flash published .swf file.
Loading a Sound from
a Shared Library
Create a Shared Audio Library
Create a new Flash document.
Add the audio files to the
document's Library. They do not
have to be placed on the Stage.
Click the File menu, and then click
Save. Use a distinctive name for
the source document.
Select an audio file in the Library.
Click the Library Options button,
and then click Properties.
Select the Export For Runtime
Sharing check box.

◆
If the check box is not
available, clear the Import for
runtime sharing check box.
Enter a distinctive name for the
Identifier field or use the default.
Enter the name of the published
document into the URL field.
Click OK.
Repeat steps 4 through 9 until all
the audio files are correctly linked.
Click the File menu, and then click
Publish to create the Flash .swf
file.
Close the original source file.
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Chapter 12 Working with Sounds
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Work with Shared Audio
Libraries
Click the File menu, point to
Import, and then click Open
External Library.
Select the shared Library, and then
click Open.
The items in the external Library
will be grayed out, indicated they
are sharable items.
Drag the audio files from the
external Library to the Library of
the active document.
To display or change link
properties for an audio, double-
click the audio icon in the Library,
click Advanced (if necessary),
view or change link options, and
then click OK.
When you publish the Flash .swf
file, the audio files will be drawn
from the common Library, without
increasing the size of the Flash
movie.

4
3
2
1
External
Library
(Shared)
3
Linkage settings
for audio
Active
Library
4
Did You Know?
A Flash Library can be shared with
other designers.
Since a Library is sim-
ply a Flash movie with Library ele-
ments, you can create common
libraries of often-used elements, and
then give them to other designers.
When you're working with two or more
designers, this is a great way to
maintain consistency on a complex
project.
From the Library of Wow! eBook
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Chapter 12
Sound is a great motivator. For example, a particular piece of music

can make you happy, or it can make you sad. In addition, sounds can
pull out childhood memories and stir emotions. Sound is a powerful
tool, however, different people react differently to sounds, therefore it's
important that you think carefully about the sounds you add to your
movies. It's equally important to understand how you can control your
movies using using ActionScript 3.0 code or ActionScript Behaviors in
ActionScript 2.0.
Using Audio with
ActionScript
Load a Sound from the Library
with ActionScript 3.0
Create or open a Flash document
(ActionScript 3.0).
Click the Window menu, click
Library to open the Library panel,
and then select an audio file from
the available Library items.
Right-click (Win) or Command-
click (Mac) the audio sound, and
then click Properties. Click
Advanced, if necessary.
Enter a distinctive name for the
Identifier field or use the default.
Select the Export For ActionScript
check box.
Leave the other fields at their
default values, and then click OK.
Click Frame 1 in a layer.
Click the Window menu, and then
click Actions.

Type the ActionScript code shown
in the illustration:
Click the Control menu, point to
Test Movie, and then click Test.
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From the Library of Wow! eBook
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Chapter 12 Working with Sounds
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Load a Sound from the Library
with an ActionScript Behavior
Create or open a Flash document
(ActionScript 2.0).
Click the Window menu, click

Library to open the Library panel,
and then select an audio file from
the available Library items.
Click the Library Options button,
and then click Properties. Click
Advanced, if necessary.
Select the Export For ActionScript
check box.
Enter a distinctive name for the
Identifier field or use the default.
Leave the other fields at their
default values, and then click OK.
Click the Window menu, and then
click Behaviors to open the
Behaviors panel.
Select a button object on the
Stage or Timeline keyframe.
Click the plus (+) sign, located in
the upper-left portion of the
Behaviors panel, point to Sound,
and then click Load Sound From
Library.
Enter the name of the audio file in
the Linkage ID field.
Enter a unique name in the
instance field.
Select the Play This Sound When
Loaded check box.
Click OK.
Select an Event to trigger the

sound. If the audio file was added
to a Timeline frame, the event field
will be disabled.
Click the Control menu, point to
Test Movie, and then click Test.
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From the Library of Wow! eBook

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Chapter 12
You can load an MP3 music audio file using a built-in Flash behavior.
The advantage to this process is that the file is loaded when needed,
and it never increases the size of the original Flash movie. Flash per-
forms a calculation on audio files as they are loading. When it has
enough of an audio file, it begins playing, while it continues to down-
load the remaining information in the background. For large audio files,
this cuts down on long wait times and keeps the visitor from becoming
bored. Streaming MP3 files are not part of a pre-existing Flash movie,
they're just available from a common location.
Loading a Streaming
MP3 File
Load a Streaming MP
3
File with
ActionScript 3.0
Create or open a Flash document
(ActionScript 3.0), and then select
a button object on the Stage.
Open the Properties panel.
Enter a distinctive name for the
object in the Instance field, such
as
myButton
.
Click Frame 1 in the actions layer.
Click the Window menu, and then
click Actions.

Enter the script as shown in the
illustration:
Click the Control menu, point to
Test Movie, and then click Test.
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See Also
See Project 2, “Loading and Formatting
Text” in the Workshops, available at
www.perspection.com, for Action-
Script 3.0 code to load external text.
From the Library of Wow! eBook