Question

我需要一个接一个地播放三个音乐曲目。有必要再次加载它并且在缓存中。我用这个代码。在localhost上一切正常，但只有在服务器上重启应用程序后才能正常工作。每次重新下载曲目都是错误的。

public function musicOn():void{
    if (sndStart == 'true'){
        req = new URLRequest("media/" + track + ".mp3");
        snd.load(req);
        channel = snd.play(); 
        channel.addEventListener(Event.SOUND_COMPLETE, onPlaybackComplete);
        sndStart = 'false';
    } else {
        sndStart = 'true';
    }
}

public function musicOff():void{
    if (snd.length>0){
        channel.stop();
        snd = new Sound();
        channel = new SoundChannel();
        sndStart = 'true';
    }   
}

public function onPlaybackComplete(event:Event):void{ 
    if (track==3){
        track = 1;
    } else {
        track++;
    }
    sndStart = 'true';
    snd = new Sound();
    musicOn(); 
}

我运行这些功能：

if (optObj.music == 'true' && sndStart == 'true'){
    musicOn();
} else if (optObj.music == 'false'){
    musicOff();
}

optObj.music - 当应用程序启动或调用函数时，调用参数的对象会更改设置。

Answer 1

我不确定我理解你写的所有内容，但是这个怎么样：

package test
{
import flash.display.MovieClip;
import flash.events.Event;
import flash.media.Sound;
import flash.media.SoundChannel;
import flash.net.URLRequest;

public class SoundTest extends MovieClip 
{
    private var files : Array = [ "file1.mp3", "file2.mp3", "file3.mp3" ];
    private var sounds : Array = [];
    private var count : int = 0;
    private var channel : SoundChannel;


    public function musicOff () : void 
    {
        if (channel != null) 
        {
            channel.removeEventListener( Event.SOUND_COMPLETE, onSoundComplete );
            channel.stop( );
            channel = null;
        }
    }

    public function musicOn () : void 
    {
        if (sounds[count] == null) loadSound( );
        else playLoadedSound( );
    }

    private function loadSound () : void 
    {
        var sound : Sound = new Sound( );
        sound.addEventListener( Event.COMPLETE, onSoundLoaded );
        sound.load( new URLRequest( files[count] ) );
    }

    private function playLoadedSound () : void 
    {
        channel = sounds[count].play( );
        channel.addEventListener( Event.SOUND_COMPLETE, onSoundComplete );
    }

    private function onSoundComplete (ev : Event) : void 
    {
        channel = null;
        count++;
        if (count >= files.length) count = 0;
        musicOn( );
    }

    private function onSoundLoaded (ev : Event) : void 
    {
        var snd : Sound = ev.target as Sound;
        sounds.push( snd );
        channel = snd.play( );
        channel.addEventListener( Event.SOUND_COMPLETE, onSoundComplete );
    }

    public function SoundTest ()
    {
        musicOn( );
    }
}
}

（顺便说一下，在加载声音之前你无法播放声音。这就是为什么你的脚本只有在重启后，当mp3在浏览器缓存中时才能工作。）

如何在AS3中播放音乐曲目？

1 个答案: