Question

简而言之，这就是我想要完成的事情：

点击影片剪辑，添加儿童
点击儿童影片剪辑，播放声音
再次点击子项，停止声音
第三次点击儿童，删除儿童

可悲的是，我只是走到了第1步。我已经想出了如何在点击父级影片剪辑时播放声音（我正在使用连接），但是当我尝试完之后和孩子一起，我收到以下错误：

~~TypeError：错误＃1010：术语未定义且没有属性。~~（我不再收到此错误）

场景1，图层'动作'，第1帧，第29行1120：访问未定义属性newBox。


    leftBox.addEventListener(MouseEvent.CLICK, addBox);
    function addBox(event:MouseEvent):void 

    {
    var newBox:right_box = new right_box();
    addChild(newBox);
    newBox.x = 0;
    newBox.y = 0;
    newBox.width = leftBox.width;
    newBox.height = leftBox.height /2;

    }
    newBox.addEventListener(MouseEvent.CLICK, playSound);
    function playSound(event:Event)
    {
    var mySound:testSound = new testSound();
    mySound.play();

    }

非常感谢任何帮助。

谢谢！

（P.S。我是n00b，所以请你好！）

Answer 1

您尝试在创建新事件之前向其添加事件侦听器。请按以下步骤操作：

// mySound should be availible in scope
var mySound:testSound = new testSound();

// newBox also
var newBox:right_box;
// here is a channel for you
var channel: SoundChannel;

// ok this adds the first listener...
leftBox.addEventListener(MouseEvent.CLICK, addBox);


function addBox(event:MouseEvent):void {
    newBox = new right_box();
    addChild(newBox);
    newBox.x = 0;
    newBox.y = 0;
    newBox.width = leftBox.width;
    newBox.height = leftBox.height /2;
    // you should add listener here...
    newBox.addEventListener(MouseEvent.CLICK, playSound);
    // you have to avoid multiple newBoxes on each other and
    // leaving the older ones under..
    // So stop listening to the newBox generating event: 
    leftBox.removeEventListener(MouseEvent.CLICK, addBox);
}

function playSound(event:Event){
    channel = mySound.play();
    // On next click you want sound to stop so
    // First remove the old listener to avoid play over:  
    newBox.removeEventListener(MouseEvent.CLICK, playSound);
    // and hook listener to stop method
    newBox.addEventListener(MouseEvent.CLICK, stopSound);
 }

 function stopSound(event:Event){
    channel.stop();
    // On next click you want to remove newBox 
    // First remove the old listener to avoid play over:  
    newBox.removeEventListener(MouseEvent.CLICK, stopSound);
    newBox.addEventListener(MouseEvent.CLICK, removeNewBox);
 }

 function removeNewBox(event:Event){
    // First remove the listener :  
    newBox.removeEventListener(MouseEvent.CLICK, removeNewBox );
    removeChild(newBox); // now remove from display list
    newBox = null; // make contents eligible for garbage collection 
 }

在AS3中添加/删除子视频剪辑中的事件侦听器

1 个答案: