Question

我正在加载几个声音文件，并希望错误检查每个加载。但是，相反使用自己的完整/错误函数对每个函数进行编程，我希望它们都使用相同的完整/错误处理函数。

成功加载的声音应创建新的声道变量，而未成功加载的声音将产生一个简单的轨迹，其中包含无法加载的声音名称。但是，为了做到这一点，我需要动态创建变量，我还没有想出怎么做。

这是我的完整和错误函数的代码：

function soundLoadedOK(e:Event):void
 {
 //EX: Sound named "explosion" will create Sound Channel named "explosionChannel"
 var String(e.currentTarget.name + "Channel"):SoundChannel = new SoundChannel();
 }

function soundLoadFailed(e:IOErrorEvent):void
 {
 trace("Failed To Load Sound:" + e.currentTarget.name);
 }

- = - = - = - = - = - = - = - = - 更新（RE：viatropos） - = - = - = - = - = - = - = - = -

无法找到错误。

TypeError：错误＃1009：无法访问空对象引用的属性或方法。在lesson12_start_fla :: MainTimeline / loadSounds（）在lesson12_start_fla :: MainTimeline / frame1（）：

//Sounds
var soundByName:Object = {};
var channelByName:Object = {};
var soundName:String;
var channelName:String;
loadSounds();

function loadSounds():void
{
    var files:Array = ["robotArm.mp3", "click.mp3"];
    var i:int = 0;
    var n:int = files.length;
    for (i; i < n; i++)
    {
        soundName = files[i];
        soundByName[soundName] = new Sound();
        soundByName[soundName].addEventListener(Event.COMPLETE, sound_completeHandler);
        soundByName[soundName].addEventListener(IOErrorEvent.IO_ERROR, sound_ioErrorHandler);
        soundByName[soundName].load(new URLRequest(soundName));
    }
}

function sound_completeHandler(event:Event):void
{
    channelName = event.currentTarget.id3.songName;
    channelByName[channelName] = new SoundChannel();
}

function sound_ioErrorHandler(event:IOErrorEvent):void
{
    trace("Failed To Load Sound:" + event.currentTarget.name);
}

Answer 1

您可以通过以下几种方式实现这一目标：

将SoundChannel存储在数组中。如果您关心订单，或者您不关心按名称获取订单，那就太好了。
在Object中以任何名称存储SoundChannel。如果你想轻松获得名字，那就太好了。请注意，Object类只能存储字符串（{key:value}或object[key] = value）。如果您需要将对象作为键，请使用flash.utils.Dictionary，这是一个美化的哈希。

这是一个演示使用数组与对象的示例。

var channels:Array = [];
// instead of creating a ton of properties like
// propA propB propC
// just create one property and have it keep those values
var channelsByName:Object = {};

function loadSounds():void
{
    var files:Array = ["soundA.mp3", "soundB.mp3", "soundC.mp3"];
    var sound:Sound;
    var soundChannel:SoundChannel;
    var i:int = 0;
    var n:int = files.length;
    for (i; i < n; i++)
    {
        sound = new Sound();
        sound.addEventListener(Event.COMPLETE, sound_completeHandler);
        sound.addEventListener(IOErrorEvent.IO_ERROR, sound_ioErrorHandler);
        sound.load(files[i]);
    }
}

function sound_completeHandler(event:Event):void
{
    // option A
    var channelName:String = event.currentTarget.id3.songName;
    // if you want to be able to get them by name
    channelsByName[channelName] = new SoundChannel();

    // optionB
    // if you just need to keep track of all of them,
    // and don't care about the name specifically
    channels.push(new SoundChannel())
}

function sound_ioErrorHandler(event:IOErrorEvent):void
{
    trace("Failed To Load Sound:" + event.currentTarget.name);
}

如果有问题，请告诉我。

Answer 2

//Load Sounds
var soundDictionary:Dictionary = new Dictionary();
var soundByName:Object = new Object();
var channelByName:Object = new Object();

loadSounds();

function loadSounds():void
    {
    var files:Array = ["robotArm.mp3", "click.mp3"]; //etc.
    for (var i:int = 0; i < files.length; i++)
        {
        var soundName:String = files[i];
        var sound:Sound=new Sound(); 
        soundDictionary[sound] = soundName;
        soundByName[soundName] = sound;
        sound.addEventListener(Event.COMPLETE, sound_completeHandler);
        sound.addEventListener(IOErrorEvent.IO_ERROR, sound_ioErrorHandler); 
        sound.load(new URLRequest(soundName));
        }
    }                                                                        

function sound_completeHandler(e:Event):void
    {
    var soundName:String=soundDictionary[e.currentTarget];                      
    channelByName[soundName] = new SoundChannel();                          
    }

function sound_ioErrorHandler(e:IOErrorEvent):void
    {
    trace("Failed To Load Sound:" + soundDictionary[e.currentTarget]);
    }

//Play Sound
channelByName["robotArm.mp3"] = soundByName["robotArm.mp3"].play();

//Stop Sound
channelByName["robotArm.mp3"].stop();

在Actionscript 3.0中动态创建变量？

2 个答案: