将 MovieClips 的动态实例添加到数组

Question

我正在尝试在数组中添加一个 MovieClip 的实例。 House 类内部是一个名为 HouseObjects 的属性。在该数组中，我创建了一个 Comp 和一个 Light 类。影片剪辑通过链接动态放置在舞台上。影片剪辑也充当“切换按钮”。如果按钮状态为ON，则值为1。如果按钮状态为OFF，则值为0。

如果值为 1，我试图在 onList 数组中添加 MovieClip 实例。该数组中将包含按钮状态为 ON 的所有实例。

我创建了一个名为 objSelect 的属性。

var objSelect:Object;

该变量保存选定的 currentTarget。我正在尝试将它传递给function trackItems，以便根据按钮状态在 onList 数组中推送/弹出它。

我收到此行的错误： onList.pop(objSelect); 参数数量不正确。预计不超过 0。

     public class House extends MovieClip 

    {

        var HouseObjects:Array = new Array();
    var onList:Array = []; // instances added to this array that have a bstatus ON
        var power:int; // holds value of individual House Objects
        var bstate:int; // 0 or 1 (ON or OFF)
        var bstatus:int;
        var userInput:int; // stores user data (of selected data); 
        //holds value of e.currentTarget.power

        var currentPower:int; // stores current power
            var objSelect:Object;

        public function House() 
        {
        // Instances are MovieClip "toggle buttons"
        HouseObjects[0] = new Comp(); // creates instance of Comp 
        HouseObjects[1] = new Light(); // creates instance of Light 
        }

         function toggleClick(e:MouseEvent) {
            // go to appropriate frame
      if (e.currentTarget.currentFrame == 2)
       {
        e.currentTarget.gotoAndStop(3);
        e.currentTarget.bstate = 1;
       }

       if (e.currentTarget.currentFrame == 4)
       {
        e.currentTarget.gotoAndStop(1);
        e.currentTarget.bstate = 0;
       } 

          bstatus = e.currentTarget.bstate;
          objName = e.currentTarget.name;

        trackItems(objSelect, bstatus); 


  } // end of function toggle click



  function trackItems(objSelect:Object, bstatus:int):void 
  {
     if (bstatus == 0) {
        // remove objSelect from Array onList 

     } else if (bstatus == 1) {
        onList.push(objSelect);
        //add to Array onList       
     }   

 }

 // function called when user clicks on update button
 function updateStage():void
 {
    for (var i:int = 0; i<=onList.length;i++) { 
    addChild(onList[i]);
    }

 }

}

Answer 1

你不需要遍历一个数组来找到要删除的元素，只需使用 indexOf 方法：

var index:int = onList.indexOf(objSelect); onList.splice(索引, 1);

我建议只将对象的名称添加到 onList 数组中，这样比较更直接，更不容易出错

//如果按钮状态为On onList.push(objSelect.name); //如果按钮状态为关闭 var index:int = onList.indexOf(objSelect.name); onList.splice(索引, 1);

然后你可以像这样更新舞台：

function updateStage():void
{
   for (var i:int = 0; i<=HouseObjects.length;i++) 
  { 
     //if the onList Array contains the current name
     if( onList.indexOf(HouseObjects[i].name) != -1 ) 
           addChild(HouseObjects[i]);
  }

}

Answer 2

http://www.adobe.com/livedocs/flash/9.0/ActionScriptLangRefV3/Array.html#pop%28%29

Pop 从数组中删除最后一个元素，如果要删除特定元素，请使用 Array.splice 和 deleteCount == 0。

Answer 3

创建了一个函数，用于查找需要移除的项目，并在 objSelect 中传入。找到项目后，使用 splice()。

  function trackItems(objSelect:Object, bstatus:int):void 
 {
     if (bstatus == 0) {
        //remove instance from onList array     
        // call function removeArrayItem
        removeArrayItem(objSelect);

     } else if (bstatus == 1) {
        //remove instance from onList array     
        onList.push(objSelect);
     }   
 }

 function removeArrayItem(objSelect:Object):void
{
        var arrayLength:int = onList.length;

        // Loop through array to find item that needs to be removed
        for (var i:int=0; i<arrayLength; i++)
        {
            if (onList[i] == objSelect)
            {
               onList.splice(i, 1);
            }
        }

}

Answer 4

pop 删除数组的最后一项。如果要删除给定的项目，则需要将数组的尾部向上移动到要删除的元素的位置

Answer 5

我的建议是使用更高级的集合，例如
http://livedocs.adobe.com/flex/3/langref/mx/collections/ArrayCollection.html#methodSummary

这里是修改后的代码：

public class House extends MovieClip 

{

    var HouseObjects:Array = new Array();
var onList:ArrayCollection = new ArrayCollection(); // instances added to this array that have a bstatus ON
    var power:int; // holds value of individual House Objects
    var bstate:int; // 0 or 1 (ON or OFF)
    var bstatus:int;
    var userInput:int; // stores user data (of selected data); 
    //holds value of e.currentTarget.power

    var currentPower:int; // stores current power

    public function House() 
    {
    // Instances are MovieClip "toggle buttons"
    HouseObjects[0] = new Comp(); // creates instance of Comp 
    HouseObjects[1] = new Light(); // creates instance of Light 
    }

     function toggleClick(e:MouseEvent) {
        // go to appropriate frame
  if (e.currentTarget.currentFrame == 2)
   {
    e.currentTarget.gotoAndStop(3);
    e.currentTarget.bstate = 1;
   }

   if (e.currentTarget.currentFrame == 4)
   {
    e.currentTarget.gotoAndStop(1);
    e.currentTarget.bstate = 0;
   } 

      bstatus = e.currentTarget.bstate;
      objName = e.currentTarget.name;

    trackItems(objSelect, bstatus); 


  } // end of function toggle click



  function trackItems(objName:Object, bstatus:int):void 
  {
     if (bstatus == 0) {
        onList.removeItemAt(onList.getItemIndex(objName));
        // remove from onList 

     } else if (bstatus == 1) {
        onList.addItem(objName);
        //add to onList       
     }   

 }

 // function called when user clicks on update button
 function updateStage():void
 {
    for (var i:int = 0; i<=onList.length;i++) { 
    addChild(onListgetItemAt(i));
    }

 }