如何在 Flex 中克隆对象? [英] How to clone an object in Flex?
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问题描述
我想克隆一个 Canvas 对象,其中包含一个 Degrafa Surface,其中包含多个 Geometry 形状.
I want to clone a Canvas object, which contains a Degrafa Surface with several Geometry shapes.
我尝试了幼稚的方法:
return ObjectUtil.copy(graph_area) as Canvas;
导致错误:
TypeError: Error #1034: Type Coercion failed: cannot convert Object@63b1b51 to com.degrafa.geometry.Geometry.
TypeError: Error #1034: Type Coercion failed: cannot convert Object@63b1039 to com.degrafa.geometry.Geometry.
TypeError: Error #1009: Cannot access a property or method of a null object reference.
at mx.core::Container/addChildAt()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:2196]
at mx.core::Container/addChild()[C:\autobuild\3.2.0\frameworks\projects\framework\src\mx\core\Container.as:2140] ...
推荐答案
你要的就是所谓的深拷贝,生成一个新的实例,和原来的信息一样.
What you want is called a deep copy, generate a new instance with the same information of the original.
我知道怎么做的唯一方法是使用 ByteArray,如下所示:
The only way I know how to do it is using ByteArray as follows:
private function clone(source:Object):*
{
var buffer:ByteArray = new ByteArray();
buffer.writeObject(source);
buffer.position = 0;
return buffer.readObject();
}
AS3 确实缺少 Object.clone()...
AS3 is really lacking Object.clone()...
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