在影片剪辑或雪碧存储可变 [英] Store variable in Movieclip or Sprite

问题描述

如何数据添加到动态创建的MovieClip /精灵，使得数据可以在以后的事件配位于该MovieClip被访问/雪碧？

How can you add data to a dynamically created MovieClip/Sprite so that the data can be accessed later on an event coordinating to that MovieClip/Sprite?

例如code：

for(var i:int; i < xml.children(); i++){
    var button:MovieClip = new MovieClip();
    button.graphics.beginFill(0x000000);
    button.graphics.drawCircle(100 + 20 * i, 200, 10);
    button.graphics.endFill();
    button.addEventListener(MouseEvent.MOUSE_UP, doSomething);
    button.name = "item_"+i;
    button.storedData.itemNumber = i;
}

function doSomething(e:Event):void
{
    trace(e.target.storedData.itemNumber);
}

在此先感谢。

Thanks in advance.

推荐答案

幸运的是，在AS3中，MovieClip类定义为动态类（只有影片剪辑，精灵不是）。在已被定义为动态的一类，可以通过标准的变量赋值语句添加一个新的动态实例，该类的任何实例。

Luckily for you, in AS3, the MovieClip class is defined as a dynamic class (and only movie clips are, sprites not). In a class that has been defined as dynamic, you can add a new dynamic instance to any instance of that class via a standard variable assignment statement.

var myInstance:DynamicClass= new DynamicClass();
myInstance.foo = "hello World"; // this won't cause any compile time errors

trace(myInstance.foo ); //returns hello World

EA-SY ^ _ ^

EA-SY ^_^

现在让我们来创建动态的几个影片剪辑，然后更改其中的一个属性。

Now let's create dynamically several MovieClips and then change a property of one of them.

AS2语法：

for(var i:Number = 0; i < 10; i++){
    _root.createEmptyMovieClip("button" + i, _root.getNextHighestDepth());
}

然后，你可以直接打电话给你的影片剪辑：

Then you could call your movie clip directly :

button3._x = 100;
button3._y = 300;

或动态通过使用这样的：

or dynamically by using this :

this["button" + i]._x = 100;
this["button" + i]._y = 300;

在AS3，这是完全不同的（而且会有很多方法可以做到这一点）。

In AS3, it is quite different (and there would be many ways to do it).

AS3语法：

var button:Array = new Array();

for (var i:Number = 0; i < 10; i++) {
    var _mc:MovieClip = new MovieClip();
    addChild(_mc); // in AS3 when you create a MovieClip, it remains in memory and won't be seen on stage until you call addChild(_mc)

    button[i] = _mc;
}

然后你可以有一些乐趣，你的电影剪辑，动态：

Then you can have some fun with your movie clips, dynamically :

button[2].graphics.beginFill(0x000000);
button[2].graphics.drawCircle(100, 200, 10);
button[2].graphics.endFill();

这篇关于在影片剪辑或雪碧存储可变的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！