actionscript-3 - AS3中继承Dictionary有什么技巧？

Question

给出以下代码:

import flash.utils.Dictionary;

import mx.collections.ArrayCollection;
import mx.controls.Alert;

public class CDictionary extends Dictionary
{
    public function CDictionary(weakKeys:Boolean=false)
    {
        super(weakKeys);
    }
}

这会引发错误#1056:

m_cdictNearIDs = new CDictionary();
m_cdictNearIDs[4] = "f";

但这不是:

m_cdictNearIDs = new Dictionary();
m_cdictNearIDs[4] = "f";

(在每种情况下，它都是一个被声明为与其实例化的类型相同的成员变量。)什么？从字典继承有什么技巧？谢谢!

Answer 1

您必须将类定义为动态:

package
{
    import flash.utils.Dictionary;

    public dynamic class CDictionary extends Dictionary
    {
        public function CDictionary(weakKeys:Boolean=false)
        {
            super(weakKeys);
        }
    }
}