所以我已经在 actionscript 3 上进行了几个星期了，但我仍然是一个完整的新手。我遇到的最大困难是将类链接到我的文档类。例如，我将有一个很棒的类，它做得非常好（我可以将它作为另一个 FLA 的文档类插入，它会提供该特定功能所需的所有功能），但现在当我必须插入它作为一个普通类......我想“子类化”文档类，一切都下地狱了。
我知道您必须更改变量并实例化事物才能使其正常工作，我有点理解这一点，但有时它只是让我无法理解，如果我已经拥有一个完整的工人阶级，我觉得它们应该是一个简单的解决方案. 似乎经常有十亿件事情我需要切换。
无论如何，我有一个具体的例子，我希望有人可以帮助解释并引导我了解一下。我上网找到了一些滑块的代码，然后花了最后几个小时对其进行编辑以包含我想要的 mp3、循环播放等等。现在它在指定的 FLA 上运行良好......我只是将它作为文档类和向上弹出一个设计的音频滑块，可以改变音量、循环和所有内容。现在我想将此滑块添加到我一直在开发的一个简单游戏中，但不知道从哪里开始或做什么。不过现在我会保持简单。
假设我只有空白文档类和音频滑块类。现在，当我运行我的游戏时，它当然会运行文档类，然后我希望它直接运行我的音频滑块类。我想如果我能解决这个问题，我就能将它应用到我的游戏中。所以这是我的空白文档类和我的音频滑块类！谢谢您的帮助！
我试过的
我尝试在文档类中为精灵和滑块创建公共变量，然后在文档类运行后创建一个新的精灵/滑块。我认为这是在正确的轨道上，但后来看起来我必须对音频滑块类中的几乎所有变量都这样做。我还想……为什么我不能在 Document Class 中运行 Volume() 呢？仍然让我有些困惑，为什么这不起作用，但事实并非如此。
空白文档类
package {
import flash.display.MovieClip;
import flash.display.Sprite;
public class ASDocumentClass extends MovieClip {
public function ASDocumentClass() {
}
}
}
这是音频滑块类
package {
import flash.display.Sprite;
import flash.display.Graphics;
import flash.events.MouseEvent;
import flash.events.Event;
import flash.net.URLRequest;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.media.SoundTransform;
import flash.geom.Rectangle;
public class Volume extends Sprite {
public var snd:Sound = new Sound();
public var channel:SoundChannel = new SoundChannel();
//URLRequest=new URLRequest("solitude.wav");
//Make sure you pass URLRequest an audio file on your computer.
public var req:BackgroundMusic = new BackgroundMusic();
public var boundary:Rectangle;
public var sprite:Sprite;
public var slider:Sprite;
public var xPos:Number=stage.stageWidth/2;
public var yPos:Number=stage.stageHeight/2;
public var vol:Number;
/*
Our request is loaded into the sound object and plays through
our channel. Volume is initially set at 50% and passed as a
transformation to our our channels soundTransform property
(a fancy way of saying volume). The init() function is called.
*/
public function Volume() {
channel=req.play();
channel.addEventListener( Event.SOUND_COMPLETE, onBackgroundMusicFinished,false,0,true );
vol=.5;
channel.soundTransform=new SoundTransform(vol);
init();
}
/*
The init function creates and draws a rectangle and circle
to the stage and centers them based on the height and
width of the stage. In addition, a rectangle object is
created to 'contain' the sliding circle, like an imaginary box.
We pass -100 as the x value because it is added relative
to our sprite. If we set its x value at 0, or the sprites default x
value,the boundary would stop and start at the slider sprite. Change
-100 to 0 in the rectangle object to get a better idea of its use.
*/
public function init():void {
sprite = new Sprite();
sprite.graphics.beginFill(0x999999);
sprite.graphics.drawRect(xPos,yPos,200,5);
sprite.graphics.endFill();
addChild(sprite);
sprite.x-=sprite.width/2;
slider = new Sprite();
slider.graphics.beginFill(0xFF0000);
slider.graphics.drawCircle(xPos,yPos, 20);
slider.graphics.endFill();
addChild(slider);
slider.addEventListener(MouseEvent.MOUSE_DOWN, dragSlider);
stage.addEventListener(MouseEvent.MOUSE_UP, stopSlider);
boundary=new Rectangle(-100,0,200,0);
}
/*
dragSlider runs when the use holds the mouse button down. A
startDrag method is used on our sprite where we specify boundary
as our dragging limits. A new event handler designed
to change the mouse volume is subsequenlty called per frame, where
the slider.x property determines volume.
*/
public function dragSlider(event:MouseEvent):void {
slider.startDrag(false,boundary);
slider.removeEventListener(MouseEvent.CLICK, dragSlider);
slider.addEventListener(Event.ENTER_FRAME, changeVolume);
}
/*
Stops dragging and removes the event listener to save on space. Again,
volume will be based on the sliders current x position, which is
constantly being recalculated per frame because we used an
ENTER_FRAME event.
*/
public function stopSlider(event:MouseEvent):void {
slider.stopDrag();
slider.removeEventListener(MouseEvent.MOUSE_UP, stopSlider);
}
/*
This function is constantly recalculating the vol variable
based on the sliders x position, relative to the length of
our rectangle. Creates a decimal range from 0 to 1, where 1
represents 100% volume and 0 represents mute. Anything exceeding
100% causes distortion.
*/
public function changeVolume(event:Event):void {
vol=.5+Math.round(slider.x)/200;
channel.soundTransform=new SoundTransform(vol);
}
public function onBackgroundMusicFinished(event:Event):void
{
channel = req.play();
channel.addEventListener( Event.SOUND_COMPLETE, onBackgroundMusicFinished );
}
}
}