actionscript-3 - 如何在ActionScript 3.0中为音乐播放器创建EASY自定义搜索栏

Question

连接旋律并创建实例的形式的代码..

import flash.events.Event;
var mySound:Sound = new MyFavSong();
var myChannel:SoundChannel = new SoundChannel();
var lastPosition:Number = 0; 
var myTransform = new SoundTransform();
myChannel = mySound.play();
myTransform.volume = 1; 
myChannel.soundTransform = myTransform; 
stop();

然后播放按钮，暂停，声音停止+音量
停止

 stop_btn.addEventListener(MouseEvent.CLICK, onClickStop);
    function onClickStop(e:MouseEvent):void{
    myChannel.stop();
    lastPosition = 0;
    stop();
    }

暂停

pause_btn.addEventListener(MouseEvent.CLICK, onClickPause);
function onClickPause(e:MouseEvent):void{
lastPosition = myChannel.position;
myChannel.stop();
stop();
}

玩

 play_btn.addEventListener(MouseEvent.CLICK, onClickPlay);
    function onClickPlay(e:MouseEvent):void{
    myChannel = mySound.play(lastPosition);
    myChannel.soundTransform = myTransform;
    play();
    }

卷

up_btn.addEventListener(MouseEvent.CLICK, onClickUp);
function onClickUp(e:MouseEvent):void{
myChannel.soundTransform = myTransform;
myTransform.volume = myTransform.volume + 1;
}

请帮我

Answer 1

soundChannel没有专用的进度事件，但是您可以在每帧访问SoundChannel.position属性以获取当前的声音位置(以毫秒为单位)。您可以通过将SoundChannel.position的值除以Sound.length的值来获得搜索栏的比例。
参见示例:

var mySound: Sound = new MyFavSong();
var myChannel: SoundChannel = mySound.play();
var lastPosition: Number = 0;
var myTransform = new SoundTransform();
myTransform.volume = 1;
myChannel.soundTransform = myTransform;
stop();

var totalWidth: Number = stage.stageWidth;
var barContainer: Sprite = new Sprite();
var progressBar: Shape = new Shape();
var blankBar: Shape = new Shape();
initBlankBar();
barContainer.addChild(blankBar);
barContainer.addChild(progressBar);
barContainer.addEventListener(MouseEvent.CLICK, seekSound);
progressBar.addEventListener(Event.ENTER_FRAME, updateSoundProgress);
addChild(barContainer);

function initBlankBar(): void {
    blankBar.graphics.beginFill(0xAAC7DB);
    blankBar.graphics.drawRect(0, 0, totalWidth, 20);
    blankBar.graphics.endFill();
}

function updateSoundProgress(e: Event): void {
    var w: Number = (myChannel.position / mySound.length) * totalWidth;
    progressBar.graphics.clear();
    progressBar.graphics.beginFill(0xFF0000);
    progressBar.graphics.drawRect(0, 0, w, 20);
    progressBar.graphics.endFill();
}

function seekSound(e: MouseEvent):void {
    lastPosition = (e.localX / totalWidth) * mySound.length;
    onClickPlay(null);
}

function onClickPlay(e: MouseEvent): void {
    myChannel.stop();
    myChannel = mySound.play(lastPosition, 0, myTransform);
}