Question

示例问题：

我最近在我的程序中添加了一个按钮;当按钮是单击，背景音乐静音，静音按钮的动画片段变为另一个。再次点击时，音乐取消静音，动画片段再次改变为最初的状态。我使用以下代码执行此操作：

//loading the music:
var req:URLRequest = new URLRequest("teardrop.mp3");
var s:Sound = new Sound(req);
var myChannel:SoundChannel = new SoundChannel();
var sTransform:SoundTransform = new SoundTransform();
sTransform.volume = 1;
myChannel = s.play(0,9999);

//Creating the movieclip and making it a button:
var sb1:MovieClip = new MovieClip();
sb1.addChild(onS);
sb1.buttonMode = true;
sb1.useHandCursor = true;
sb1.addEventListener(MouseEvent.CLICK,muter);

//If the Music is muted, unmute it and switch to onS, if not, mute it and switch to offS.
function muter(e:MouseEvent):void
{
  if (sTransform.volume == 1)
  {
      sTransform.volume = 0;
      sb1.removeChild(onS);
      sb1.addChild(offS);
  }
  else if (sTransform.volume == 0)
  {
      sTransform.volume = 1;
      sb1.removeChild(offS);
      sb1.addChild(onS);
  }
  myChannel.soundTransform = sTransform;
}
//Note: onS and offS are movieclips which are put into the first scene Since the mute/unmute button is supposed to appear in all of the

~10个场景，在使用gotoAndStop(frame, "Scene")之后场景到另一个，我在每个场景中使用this.addChild(sb1)来添加静音按钮到那个场景。

但出于某种原因，自从我这样做以来，我的计划一直都是搞乱。静音/取消静音工作正常，但在其余部分程序：无法加载变量，按钮和文本字段正确地，或者很快就没有加载，因为我收到了错误：

TypeError: Error #1009: Cannot access a property or method of a null object reference After a while of travelling from scene to scene,

指向这一行...

getCards.addEventListener(MouseEvent.CLICK, getCardsMenu);

最近，这个：

TypeError: Error #1007: Instantiation attempted on a non-constructor. Which was pointing at this line...

var aroz:Array = new Array[nextPart,prevPart];

为什么会这样？

Answer 1

答案：切勿在未清除任何已加载到该场景的动画片段的情况下切换场景。在使用gotoAndStop(frame, "scene")之前，请始终删除您已添加到每个场景的孩子。例如：

//some code
function menuScene (e:MouseEvent):void
{
    //Never forget this line before moving scenes
    this.removeChild(sb1);
    gotoAndStop(1, "Menu Scene");
}
//more code

我发布了这个，所以没有人犯过我一直犯的错误，这个错误让我发疯，让我讨厌孩子。

PS：不是真正的孩子，我的意思是显示方法xD

使用this.addChild后，AS3程序开始搞乱

1 个答案: