AS3聲音加載

Question

我正在使用下面的代碼加載外部mp3文件：

//Create an instance of the Sound class
var soundClip:Sound=new Sound();

//Create a new SoundChannel Object
var sndChannel:SoundChannel=new SoundChannel();

//Load sound using URLRequest
soundClip.load(new URLRequest("namesounds/agamemnonas.mp3"));

//Create an event listener that wll update once sound has finished loading
soundClip.addEventListener(Event.COMPLETE,onComplete,false,0,true);
function onComplete(evt:Event):void {
    //Play loaded sound
    sndChannel=soundClip.play();
}

同樣在我的html中，我有一個下拉列表：

<select name="sounds" id="sounds">
  <option value="sounds/eden.mp3" selected="selected">eden</option>
  <option value="sounds/zeus.mp3">zeus</option>
  <option value="sounds/earth.mp3">earth</option>
</select>

是否可以從下拉菜單發送路徑到Flash文件？ 例如：

//Load sound using URLRequest
soundClip.load(new URLRequest("namesounds/agamemnonas.mp3"));

URLRequest必須是我的.php文件中下拉菜單列表中的路徑。

Answer 1

您必須在AS中使用ExternalInterface.addCallback並從javascript調用該函數

AS3

ExternalInterface.addCallback("loadSoundClip", loadSoundClip);
function loadSoundClip(mp3File:String):void{
    soundClip.load(new URLRequest(mp3File));
}

純Java腳本

// This is the <select>
var sounds = document.getElementById('sounds');
// This is the <object>/<embed>
var flashObject = document.getElementById('flashObject');
sounds.onchange = function(){
    flashObject.loadSoundClip(sounds.options[sounds.selectedIndex].value);
};

要么

jQuery的

// This is the <select>
var sounds = $('#sounds');
// This is the <object>/<embed>
var flashObject = $('#flashObject');
sounds.on('change', function(){
    flashObject[0].loadSoundClip($(this).val());
});

不要忘記將對object的allowscriptaccess設置/ embed到正確的值，以便頁面可以與Flash對象通信