Actionscript 3，从库中添加Child，然后通过实例名称访问它的子级

Question

因此，我使用 addChild() 成功从库中添加了一个影片剪辑，但现在我想访问该动态添加的影片剪辑中的一些影片剪辑。

我使用了标准点表示法，并且还使用 getChildByName 向其传递实例名称。

我在这里缺少什么？

---- 编辑 ----

我尝试了循环的建议并可以通过索引访问它们，但似乎不是那么直观的方法......下面是我之前尝试过的两个示例它们都以“1119：通过静态类型 flash.display:DisplayObject 的引用访问可能未定义的属性 nameText”返回。或“1061：通过静态类型 flash.display:DisplayObject 的引用调用可能未定义的方法 getChildByName。”

点表示法示例：

 //  build circlular display
function buildCircle() {
    trace("buildCircle()");
    if (viewByState == "assignment") {

        var competencyContainer:MovieClip = new MovieClip();
        competencyContainer.name = "competencyContainer";
        this.addChild(competencyContainer);

        var angleSegment:Number = 360 / competenciesArray.length;
        var angleSum:Number = 360 - angleSegment / 2;

        for (var i:Number = 0; i < competenciesArray.length; i++) {

            var competencyInstance:competencyCircle = new competencyCircle();
            competencyInstance.name = "competency" + i;
            competencyContainer.addChild(competencyInstance);


            competencyContainer.getChildByName("competency" + i).x = circleCenter.x - (Math.sin(angleSum * (Math.PI / 180)) * (circleSize / 2));
            competencyContainer.getChildByName("competency" + i).y = circleCenter.y - (Math.sin((90 - angleSum) * (Math.PI / 180)) * (circleSize / 2));


            competencyContainer.getChildByName("competency" + i).nameText.wordWrap = true;
            competencyContainer.getChildByName("competency" + i).nameText.embedFonts = true;
            competencyContainer.getChildByName("competency" + i).nameText.htmlText = "COMPETENCY:<br />" + competenciesArray[i].name;

            competencyContainer.getChildByName("competency" + i).nameText.setTextFormat(tfTitle, 0, competencyContainer.getChildByName("competency" + i).nameText.text.length - competenciesArray[i].name.length);

            competencyContainer.getChildByName("competency" + i).nameText.setTextFormat(tfName, competencyContainer.getChildByName("competency" + i).nameText.text.length - competenciesArray[i].name.length, competencyContainer.getChildByName("competency" + i).nameText.text.length);

            competencyContainer.getChildByName("competency" + i).nameText.autoSize = TextFieldAutoSize.CENTER;

            competencyContainer.getChildByName("competency" + i).nameText.y = -(competencyContainer.getChildByName("competency" + i).nameText.height / 2);

            competencyContainer.getChildByName("competency" + i).filters = [circleDefaultDropShadow];
            competencyContainer.getChildByName("competency" + i).selectedIndicator.visible = false;

            competencyContainer.getChildByName("competency" + i).hit.buttonMode = true;
            competencyContainer.getChildByName("competency" + i).hit.mouseEnabled = true;
            competencyContainer.getChildByName("competency" + i).hit.tabEnabled = true;
            competencyContainer.getChildByName("competency" + i).hit.mouseChildren = true;

            competencyContainer.getChildByName("competency" + i).hit.addEventListener(MouseEvent.MOUSE_OVER, function(e:MouseEvent) {
                                                                                     e.target.parent.filters = [circleHoverDropShadow];
                                                                                     });

            competencyContainer.getChildByName("competency" + i).hit.addEventListener(MouseEvent.MOUSE_OUT, function(e:MouseEvent) {
                                                                                     e.target.parent.filters = [circleDefaultDropShadow];
                                                                                     });

            competencyContainer.getChildByName("competency" + i).hit.addEventListener(MouseEvent.CLICK, function(e:MouseEvent) {
                                                                                     e.target.parent.filters = [circleDefaultDropShadow];
                                                                                     e.target.parent.selectedIndicator.visible = true;
                                                                                     });

            angleSum -= angleSegment;
            trace("end");
            trace(i);
            trace("\n\n\n");
        }
    } else if (viewByState == "competency") {



    } else {

    }
}
buildCircle();

以及使用 .getChildByName() 的示例：

    //  build circlular display
  function buildCircle() {
    trace("buildCircle()");
    if (viewByState == "assignment") {

        var competencyContainer:MovieClip = new MovieClip();
        competencyContainer.name = "competencyContainer";
        this.addChild(competencyContainer);

        var angleSegment:Number = 360 / competenciesArray.length;
        var angleSum:Number = 360 - angleSegment / 2;

        for (var i:Number = 0; i < competenciesArray.length; i++) {

                var competencyInstance:competencyCircle = new competencyCircle();
                competencyInstance.name = "competency" + i;
                competencyContainer.addChild(competencyInstance);


                competencyContainer.getChildByName("competency" + i).x = circleCenter.x - (Math.sin(angleSum * (Math.PI / 180)) * (circleSize / 2));
                competencyContainer.getChildByName("competency" + i).y = circleCenter.y - (Math.sin((90 - angleSum) * (Math.PI / 180)) * (circleSize / 2));


                competencyContainer.getChildByName("competency" + i).getChildByName("nameText").wordWrap = true;
                competencyContainer.getChildByName("competency" + i).getChildByName("nameText").embedFonts = true;
                competencyContainer.getChildByName("competency" + i).getChildByName("nameText").htmlText = "COMPETENCY:<br />" + competenciesArray[i].name;

                competencyContainer.getChildByName("competency" + i).getChildByName("nameText").setTextFormat(tfTitle, 0, competencyContainer.getChildByName("competency" + i).getChildByName("nameText").text.length - competenciesArray[i].name.length);

                competencyContainer.getChildByName("competency" + i).getChildByName("nameText").setTextFormat(tfName, competencyContainer.getChildByName("competency" + i).getChildByName("nameText").text.length - competenciesArray[i].name.length, competencyContainer.getChildByName("competency" + i).getChildByName("nameText").text.length);

                competencyContainer.getChildByName("competency" + i).getChildByName("nameText").autoSize = TextFieldAutoSize.CENTER;

                competencyContainer.getChildByName("competency" + i).getChildByName("nameText").y = -(competencyContainer.getChildByName("competency" + i).getChildByName("nameText").height / 2);

                competencyContainer.getChildByName("competency" + i).filters = [circleDefaultDropShadow];
                competencyContainer.getChildByName("competency" + i).getChildByName("selectedIndicator").visible = false;

                competencyContainer.getChildByName("competency" + i).getChildByName("hit").buttonMode = true;
                competencyContainer.getChildByName("competency" + i).getChildByName("hit").mouseEnabled = true;
                competencyContainer.getChildByName("competency" + i).getChildByName("hit").tabEnabled = true;
                competencyContainer.getChildByName("competency" + i).getChildByName("hit").mouseChildren = true;

                competencyContainer.getChildByName("competency" + i).getChildByName("hit").addEventListener(MouseEvent.MOUSE_OVER, function(e:MouseEvent) {
                                                                                                                                                                 e.target.parent.filters = [circleHoverDropShadow];
                                                                                                                                                                 });

                competencyContainer.getChildByName("competency" + i).getChildByName("hit").addEventListener(MouseEvent.MOUSE_OUT, function(e:MouseEvent) {
                                                                                                                                                                 e.target.parent.filters = [circleDefaultDropShadow];
                                                                                                                                                                 });

                competencyContainer.getChildByName("competency" + i).getChildByName("hit").addEventListener(MouseEvent.CLICK, function(e:MouseEvent) {
                                                                                                                                                                 e.target.parent.filters = [circleDefaultDropShadow];
                                                                                                                                                                 e.target.parent.getChildByName("selectedIndicator").visible = true;
                                                                                                                                                                 });

                angleSum -= angleSegment;
                trace("end");
                trace(i);
                trace("\n\n\n");
        }
    } else if (viewByState == "competency") {



    } else {

    }
}
buildCircle();

Answer 1

创建剪辑时使用它怎么样：

...
competencyInstance.name = "competency" + i;  
competencyContainer.addChild (competencyInstance);          
// this is the additional line, cecessary for accesing later by name
competencyContainer["clipFichaEjemplo2"] = competencyInstance;
...

这可以稍后访问它们：

...
var M:MovieClip = clipMapa["competency" + i];
...

它在一个类似的 Flash 项目中对我有用，我在动态使用 addChild 时遇到问题。

ihih：我希望它有帮助:)

Answer 2

您需要引用动态添加的影片剪辑。然后，您可以访问特定的子影片剪辑（如果它有实例名称）。

因此，如果您有实例名称为“a”的 MovieClip，并且内部有一个实例名称为“b”的 MovieClip，那么您可以简单地将其引用为 ab 但正如 Amarghosh 指出的那样，flash 将允许您拥有多个具有相同实例名称的影片剪辑，并且如果在这种情况下，只会访问其中一个影片剪辑。

Answer 3

在 AS3 中，点表示法不再像 AS2 中那样工作。当且仅当您已将子对象的名称显式声明为父对象的变量时，才可以使用它。 getChildByName 也不可靠，因为没有规则规定两个兄弟姐妹不能有相同的名字。使用 getChildAt 循环遍历所有子项。尝试类似的方法：

//assuming newMC as the added movie clip
var num:Number = newMC.numChildren;
for(var i:Number = 0; i < num; i++)
{
  var child:DisplayObject = newMC.getChildAt(i);
  trace(child.name);
}

Answer 4

你可以尝试像这样的代码：

//prizma, küp, dortgen, koni, kure, silindir are mc's name
var movieList:Array = [prizma, küp, dortgen, koni, kure, silindir];
var k:Number=Math.round(Math.random()*5);
var nes:MovieClip=new movieList [k] ();
addChild(nes);

Answer 5

我能够轻松访问动态加载库 movieClip 中的子对象。实际上，我创建了一个手动循环，根据 XML 文档中的元素数量创建按钮。调用补间函数，动画完成后，将创建一个新的按钮实例，并根据我的 x 值计算进行定位。我在这里制作的是一个网站的 Flash 导航。我想在用户单击按钮时打开“选择”影片剪辑，并在用户选择不同按钮时将其关闭。

你走在正确的轨道上，我基本上使用了你对 getChildByName 方法所做的事情。通过 for 循环，我能够通过引用创建按钮时指定的名称（在本例中为“btn_”加上变量“i”的值）来访问所有动态加载按钮的子按钮，即“btn_0, btn_1、btn_2" 等。然后将按钮添加到 btnGroup 影片剪辑中。因此，本质上，我需要做的就是使用 getChildByName("movie Clip name") 引用 btnGroup 的子元素，后跟您想要从子元素访问的对象的名称，并以 a 的形式放在括号 [""] 中细绳。请查看下面我的“鼠标功能”示例以获得正确的答案，

function btnMaker():void   
{  
  btnGroup.x = 170;  
  if(btnCount < clubXML.btn_group.*.length())  
  {  
    btnCount++;  
    b = new btn();  
    spacer = b.width-27;  
    b.x = (btnCount-1)*spacer;  
    b.y = 25;  
    b.name = "btn_"+(btnCount-1);//Name the dynamicly loaded movie clip  
    b.buttonMode = true;  
    b.mouseChildren = false;  
    b.btn_txt.text = clubXML.btn_group.btn[btnCount-1];  
    b.addEventListener(MouseEvent.CLICK, mouseFunctions);  
    b.addEventListener(MouseEvent.MOUSE_OVER, mouseFunctions);  
    b.addEventListener(MouseEvent.MOUSE_OUT, mouseFunctions);  
    b.grid_mc.stop();  
    b.grid_mc.visible = false;  
    b.select.visible = false;  
    btnGroup.addChild(b);  
    btnGroup.getChildByName("btn_0")["select"].visible = true;   
    tweenIn();  
  }  
  if(btnCount == clubXML.btn_group.*.length())  
  {  
    //btnTimer.stop();  
    xTween.removeEventListener(TweenEvent.MOTION_FINISH, animFinish);  
  }  
}  

function mouseFunctions(e:MouseEvent):void   
{  
  var btnName = e.target.name.substring(4, 5);   

  switch(e.type)   
  {   
    case("mouseOver"):   
      bounceIn = new Tween(e.target, "scaleY", Bounce.easeOut, 1.5, 1, 10, false);  
      e.target.gotoAndPlay(2);   
      e.target.getChildByName("grid_mc").visible = true;   
      //trace(e.target.getChildByName("grid_mc").totalFrames());   
      e.target.getChildByName("grid_mc").play();   
      break;   

    case("mouseOut"):   
      e.target.gotoAndPlay(12);   
      e.target.getChildByName("grid_mc").stop();   
      e.target.getChildByName("grid_mc").visible = false;   
      break;

    case("click"):   
      trace("Button Name: "+btnName);   

      currentSelection = e.target.name;   

      for(var i:int = 0; i < btnGroup.numChildren-1; i++)   
      {   
        btnGroup.getChildByName("btn_"+i)["select"].visible = false;     
      }  

      notIt != currentSelection;   

      if(currentSelection != notIt)   
      {   
        e.target.getChildByName("select").visible = true;   
      }   
      break;   
  }
}

希望这对您有所帮助。

和平

Answer 6

好的，我已经阅读了您的代码几次，并想指出以下内容。

下面是您的代码片段：

 var competencyInstance:competencyCircle = new competencyCircle();
 competencyInstance.name = "competency" + i;
 competencyContainer.addChild(competencyInstance);

 competencyContainer.getChildByName("competency" + i).x = circleCenter.x - (Math.sin(angleSum * (Math.PI / 180)) * (circleSize / 2));
 competencyContainer.getChildByName("competency" + i).y = circleCenter.y - (Math.sin((90 - angleSum) * (Math.PI / 180)) * (circleSize / 2));

在我看来，您只是设置了 CompetencyInstance 的属性，但由于某种原因，您是通过父级来设置的。我假设您是一名正在学习 AS3 的 AS2 开发人员，因为这是一种 AS2 方法。您已经拥有对该对象的引用，并且不需要访问父对象。

您的代码应如下所示。

 var competencyInstance:competencyCircle = new competencyCircle();
 competencyInstance.name = "competency" + i;

 competencyInstance.x = circleCenter.x - (Math.sin(angleSum * (Math.PI / 180)) * (circleSize / 2));
 competencyInstance.y = circleCenter.y - (Math.sin((90 - angleSum) * (Math.PI / 180)) * (circleSize / 2));
 competencyContainer.addChild(competencyInstance);

x 和 y 始终相对于父级。

解决这些问题的最佳方法是遍历父级/容器，跟踪每个对象的名称，您可能会发现您忘记了将事物嵌套得更深，等等。as3

显示列表是一件很棒的事情，因为您可以通过直接引用来访问对象，而不是通过父对象引用长点语法。您唯一需要通过父级访问事物的时候是当您没有引用时。您创建了一个局部变量 CompetencyInstance，它只能在 buildCircle() 执行时访问，一旦 buildCircle() 完成运行，在其中创建的所有局部变量的生命周期就结束。话虽如此，当您没有引用时，您将不得不使用 for 循环迭代访问每个子级的父方法。关于显示列表及其奇迹，我还有很多话要说，但我想坚持与什么有关。