Question

尝试在循环中创建类的新实例，其中已在数组中定义类实例名称。如何将数组值从字符串转换为对象？这是我到目前为止所写的内容

var tiles2:Array = new Array("e1", "e2", "e3", ...);

for (var i = 0; i < tiles2.length; i++){
    if (i == 0){
        xPos = 18;
    }else if (xPos > 0 && xPos < maxGridWidth){
        xPos =+ xPos + objWidth + horGap;
        //trace(xPos);
    }else{
        xPos = 18;
        yPos =+ yPos + verGap + objHeight;
    }
    var this[tiles2[i]] = new tiles2[i];
    this[tiles2[i]].name = tiles2[i];
    this[tiles2[i]].x = xPos;
    this[tiles2[i]].y = yPos;
    tileArray[i] = this[tiles2[i]];
    addChild(this[tiles2[i]]);
}

这是我遇到问题的地方var mc = new tiles2[i];。我期望的输出就像是

var e1 = new e1;
e1.name = tiles2[i];
e1.x = xPos;
e1.y = yPos;
tileArray[i] = e1;
addChild(e1);

如果你有更好的程序，我会很高兴，如果你能告诉我

Answer 1

我相信你正在寻找这个...

// If tiles2[i] is a string that is the name of a class
var type:Class = getDefinitionByName(tiles2[i]) as Class;
var thing = new type();

// If tiles2[i] is a string instance name for an existing object:
var thing:DisplayObject = getChildByName(tiles[i]);

或者，您可能只需将相关行更改为：

//var mc = new tiles2[i]; <-- line in question

//take out the var, and instantiate the proper class
this[tiles2[i]] = new e1();

从AS3中的数组值实例化类对象

1 个答案: