我真的需要你的帮助......下面是我的mp3播放器代码。令人讨厌的问题是在updateTime函数内部，test.width并不想从0改变它的值，这种非常奇怪的行为让我无法理解为什么......
import flash.events.MouseEvent;
import flash.media.Sound;
import flash.net.URLRequest;
import flash.media.SoundChannel;
import flash.media.SoundTransform;
import flash.utils.Timer;
import flash.events.TimerEvent;
import flash.media.SoundLoaderContext;
import flash.display.Sprite;
import flash.events.ProgressEvent;
var playlist:XML = new XML();
var loader:URLLoader = new URLLoader();
var songNamok:String = new String();
var songPathok:String = new String();
var arrayUrl:Array = new Array();
var arrayNames:Array = new Array();
var track:Number = 0;
var myMusic:Sound = new Sound();
var soundFile:URLRequest = new URLRequest();
var channel:SoundChannel = new SoundChannel();
var sTransform:SoundTransform = new SoundTransform();
var pressedButton:Object = new Object();
var tf:TextFormat = new TextFormat();
var IsPausePressed:Number = 0;
tf.color = 0xFF0000;
txtLengthOfSong.setStyle("textFormat", tf);
var tfforSong:TextFormat = new TextFormat();
tfforSong.font = "Arial";
tfforSong.size = 16;
tfforSong.bold = true;
tfforSong.color = 0xFFffff;
movingString.setStyle("textFormat", tfforSong);
//Create test bar (progressBar) in this place, all childs are drawn objects,
//they have width and height
var container:Sprite = new Sprite();
addChild(container);
container.addChild(emptyProgress);
container.addChild(loadedProgress);
container.addChild(test);
container.addChild(transparentProgress);
container.setChildIndex(emptyProgress,0);
container.setChildIndex(loadedProgress,1);
container.setChildIndex(test, 2);
container.setChildIndex(transparentProgress,3);
var secondContainer:Sprite = new Sprite();
addChild(secondContainer);
secondContainer.addChild(emptyVolume);
secondContainer.addChild(filledVolume);
secondContainer.addChild(transparentVolume);
//In accordance to this timer test (progress bar) and
// remaining time will be changed
var myTimer:Timer = new Timer(50);
var myTimerForTremble = new Timer(5);
var songPosition:Number = 0;
var myContext:SoundLoaderContext = new SoundLoaderContext(5000);
var firstTime = 0;
buttonPlay.addEventListener (MouseEvent.CLICK, playMusic);
buttonStop.addEventListener (MouseEvent.CLICK, stopMusic);
buttonPause.addEventListener (MouseEvent.CLICK, pauseMusic);
buttonPlay.addEventListener (MouseEvent.MOUSE_OVER, startTimer);
buttonStop.addEventListener (MouseEvent.MOUSE_OVER, startTimer);
buttonPause.addEventListener (MouseEvent.MOUSE_OVER, startTimer);
transparentProgress.addEventListener(MouseEvent.CLICK, changePosition);
transparentVolume.addEventListener(MouseEvent.CLICK, changeVolume);
myTimer.addEventListener(TimerEvent.TIMER, updateTime);
myTimerForTremble.addEventListener (TimerEvent.TIMER, tremble);
buttonPlay.addEventListener (MouseEvent.MOUSE_OUT, stopTimer);
buttonStop.addEventListener (MouseEvent.MOUSE_OUT, stopTimer);
buttonPause.addEventListener (MouseEvent.MOUSE_OUT, stopTimer);
filledVolume.width = (channel.soundTransform.volume * 10)*0.98;
function progressOfDownloading (event:ProgressEvent):void{
var loadedMp3:Number = Math.round(100 * (event.bytesLoaded / event.bytesTotal));
loadedProgress.width = 35;
}
function songIsOver (evt:Event):void{
evt.currentTarget.removeEventListener(evt.type, songIsOver);
myTimer.stop();
firstTime = 0;
songPosition = 0;
try {
channel.stop();
myMusic.close();
} catch(e:Error){
channel.stop();
}
ExternalInterface.call("PlayNextSong","");
}
function playTheMusic ():void{
myTimer.stop();
firstTime = 0;
if (IsPausePressed == 0)
songPosition = 0;
try {
channel.stop();
myMusic.close();
} catch(e:Error){
channel.stop();
}
playMusic();
}
function changeVolume(evt:MouseEvent):void{
var x:Number = new Number();
x = evt.stageX;
var percentOfVolume:Number = new Number();
percentOfVolume = Math.floor((x-40)/0.98);
percentOfVolume = percentOfVolume / 10;
sTransform.volume = percentOfVolume;
channel.soundTransform = sTransform;
filledVolume.width = x - 40;
}
function changePosition (evt:MouseEvent):void{
if (firstTime == 1)
{
var x:Number = new Number();
x = evt.stageX;
var percent:Number = new Number();
var totalSeconds:Number = myMusic.length;
percent = myMusic.length/100 * ((x-22)/1.56);
songPosition = percent;
channel.stop();
channel = myMusic.play(songPosition);
channel.addEventListener(Event.SOUND_COMPLETE, songIsOver);
}
}
//This function will launch every 50 milliseconds, because of myTimer
function updateTime(evt:TimerEvent):void{
var progressok:String = new String(channel.position / myMusic.length);
var progressPercent:Number = new Number (channel.position / myMusic.length);
progressPercent = progressPercent * 100;
//this is the main problem: test.width doesn't want to change at all, however
// if I will write solid value like: 10, 12, 13 it works, and also when I write
// test.width = Math.random() * 100; it also works...
test.width = Math.round(progressPercent * 1.56);
var currentPosition:Number = new Number();
currentPosition = channel.position;
var timeRemain:Number = new Number();
timeRemain = myMusic.length - channel.position;
var totalSeconds:Number = timeRemain/1000;
var minutes:Number = Math.floor(totalSeconds/60);
var seconds = Math.floor(totalSeconds)%60;
if (seconds<10) {
seconds = "0"+seconds;
}
txtLengthOfSong.text = minutes+":"+seconds;
var randomHeight:Number = new Number();
randomHeight = Math.random()*100;
if (randomHeight > 55)
randomHeight = 55;
if (randomHeight < 0)
randomHeight = 0;
column1.height = randomHeight;
column2.height = randomHeight - (Math.random()*100);
column3.height = randomHeight / 3 * 2;
column4.height = randomHeight - (Math.random()*100);
column5.height = randomHeight - (Math.random()*100);
column6.height = randomHeight - (Math.random()*100);
column7.height = randomHeight - (Math.random()*100);
column8.height = randomHeight - (Math.random()*100);
column9.height = randomHeight - (Math.random()*100);
column10.height = randomHeight - (Math.random()*100);
if (movingString.textWidth > 150)
{
var deletedChar:String = new String();
var movingText:String = new String();
movingText = movingString.text;
deletedChar = movingText.charAt(0);
movingText = movingText.substr(1) + deletedChar;
movingString.text = movingText;
}
}
function stopTimer(evt:MouseEvent):void{
pressedButton.y = 145;
myTimerForTremble.stop();
}
function tremble(evt:TimerEvent):void{
pressedButton.y = 145 + ((Math.random()*10) - 5);
}
function startTimer (evt:MouseEvent):void{
if (!myTimerForTremble.running)
pressedButton = evt.target;
myTimerForTremble.start();
}
function pauseMusic(evt:MouseEvent = null):void{
IsPausePressed = 1;
songPosition = channel.position;
pressedButton.y = 145;
myTimerForTremble.stop();
channel.stop();
firstTime = 0;
myTimer.stop();
}
ExternalInterface.addCallback('pauseTheMusic', pauseMusic);
ExternalInterface.addCallback('resetSongPosition', resetSongPosition);
function resetSongPosition ():void{
songPosition = 0;
}
ExternalInterface.addCallback('select_track', SelectTrack);
function SelectTrack(songPath:String, songName:String):void{
songPathok = songPath;
songNamok = songName;
playTheMusic();
}
function playMusic (evt:MouseEvent = null):void{
if (firstTime == 0)
firstTime = 1;
else
return;
soundFile.url = songPathok;
movingString.text = songNamok + " ";
var nextTitle:Sound = new Sound(soundFile);
myMusic = nextTitle;
channel = myMusic.play(songPosition);
channel.addEventListener(Event.SOUND_COMPLETE, songIsOver);
pressedButton.y = 145;
myTimerForTremble.stop();
myTimer.start();
var percentOfVolume:Number = new Number();
percentOfVolume = Math.floor(filledVolume.width/0.98);
percentOfVolume = percentOfVolume / 10;
sTransform.volume = percentOfVolume;
channel.soundTransform = sTransform;
}
function stopMusic (evt:MouseEvent):void{
firstTime = 0;
pressedButton.y = 145;
myTimerForTremble.stop();
channel.stop();
songPosition = 0;
myTimer.stop();
}