e.target和e.currentTarget的区别 [英] Difference between e.target and e.currentTarget

问题描述

我不理解上的差异，他们似乎都一样，但我猜他们不是。

I don't understand the difference, they both seem the same but I guess they are not.

当使用一个或另一个将AP preciated的任何实例。

Any examples of when to use one or the other would be appreciated.

推荐答案

本是完全正确的在他的答案 - 所以要什么，他说，在脑海。我要告诉你的是不是一个完整的解释，但它是一个非常简单的方法来记得 e.target ， e.currentTarget什么工作有关鼠标事件，并显示列表：

Ben is completely correct in his answer - so keep what he says in mind. What I'm about to tell you isn't a full explanation, but it's a very easy way to remember how e.target, e.currentTarget work in relation to mouse events and the display list:

e.target =鼠标下的东西（如本说...触发事件的东西）。 e.currentTarget =点前......（见下文）的事

e.target = The thing under the mouse (as ben says... the thing that triggers the event). e.currentTarget = The thing before the dot... (see below)

所以，如果你有btns的实例名称的剪辑中的10个按钮，你做的：

So if you have 10 buttons inside a clip with an instance name of "btns" and you do:

btns.addEventListener(MouseEvent.MOUSE_OVER, onOver);
// btns = the thing before the dot of an addEventListener call
function onOver(e:MouseEvent):void{
  trace(e.target.name, e.currentTarget.name);
}

e.target 将是10个按钮之一， e.currentTarget 将永远是btns剪辑。

e.target will be one of the 10 buttons and e.currentTarget will always be the "btns" clip.

值得一提的是，如果你改变了MouseEvent来一个ROLL_OVER或设置属性 btns.mouseChildren 为false， e.target 和 e.currentTarget 都将永远是btns。

It's worth noting that if you changed the MouseEvent to a ROLL_OVER or set the property btns.mouseChildren to false, e.target and e.currentTarget will both always be "btns".

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