有没有一种方法来检查的DisplayObject A是的DisplayObject B的后裔？ [英] Is there a way to check if DisplayObject A is a descendant of DisplayObject B?

问题描述

我希望能够快速检查一个给定的DisplayObject是后代（不是在继承感 - 也就是孩子，孙子，曾孙，玄孙孙子，等）。另外的DisplayObject的

似乎有不为原生的方式做到这一点，我只能想到两个方法来实现它：

1. 创建所有的嵌套循环的母亲。似乎有点，我不知道，错了吗？
2. 分派冒泡事件的'孩子'，并检查潜在的父接收它。

我试图后者目前，但将AP preciate一些投入。我想创建一个很好的工具静电功能，例如：

 的静态公共职能isDescendantOf（子：的DisplayObject，父：级DisplayObjectContainer）：布尔{

    VAR isDescendant：布尔= FALSE;

    //执行一些神奇的
    //检查返回true
    //如果它是一个后代

    返回isDescendant;
}
 

解决方案

神圣角驼鹿，事件的...

  parent.contains（子）;
 

见<参考href="http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/display/DisplayObjectContainer.html#contains%28%29">DisplayObjectContainer.contains().

I would like to be able to quickly check if a given DisplayObject is a descendant (not in the inheritance sense - ie. child, grandchild, great-grandchild, great-great-grandchild, etc.) of another DisplayObject.

There doesn't seem to be a native way to do this and I can only think of two ways to achieve it:

1. Create the mother of all nested loops. Seems a bit, I dunno, wrong?
2. Dispatch a bubbling event at the 'child' and check if the potential 'parent' receives it.

Am trying the latter now, but would appreciate some input. I'd like to create a nice utility static function, eg:

static public function isDescendantOf(child:DisplayObject, parent:DisplayObjectContainer):Boolean { 

    var isDescendant: Boolean = false;

    // perform some magical 
    // check that returns true 
    // if it is a descendant

    return isDescendant;
}

解决方案

Holy horned moose, event for that...

parent.contains(child);

See reference for DisplayObjectContainer.contains().

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