Question

我想按声明顺序将对象的所有变量放入ByteArray。对象可以是扩展对象。这是我的代码：



    private static function getVariables( packet:*): Array
    {
        var vars:Array = new Array();           
        var description:XML = describeType(packet);
        Alert.show(description);
        var descriptionList:XMLList = 
            description..accessor.(@access != "writeonly") + description..variable;
        for each ( var info:XML in descriptionList )
        {
            vars.push( { name: info.@name, type: info.@type,
                pos: uint(info..metadata..arg.@value) } );
        }
        vars.sortOn( "pos", Array.DESCENDING );
        return vars;
    }

    public static function print():void
    {
        var o:C = new C();
        var description:XML = describeType(o);
        Alert.show(description);
    }

    public class A
    {
       public var a_of_A:int;
       public var b_of_A:int;
    }
    public class B extends A
    {
       public var i_of_B:int;
       public var j_of_B:int;
    }
    public class C extends B
    {
       public var d_of_C:int;
       public var e_of_C:int;
    }

<type name="packet::C" base="packet::B" isDynamic="false" isFinal="false" isStatic="false">
    <extendsClass type="packet::B"/>
    <extendsClass type="packet::A"/>
    <extendsClass type="Object"/>
    <variable name="j_of_B" type="int">
      <metadata name="__go_to_definition_help">
        <arg key="pos" value="110"/>
      </metadata>
    </variable>
    <variable name="i_of_B" type="int">
      <metadata name="__go_to_definition_help">
        <arg key="pos" value="84"/>
      </metadata>
    </variable>
    <variable name="e_of_C" type="int">
      <metadata name="__go_to_definition_help">
        <arg key="pos" value="110"/>
      </metadata>
    </variable>
    <variable name="b_of_A" type="int">
      <metadata name="__go_to_definition_help">
        <arg key="pos" value="81"/>
      </metadata>
    </variable>
    <variable name="d_of_C" type="int">
      <metadata name="__go_to_definition_help">
        <arg key="pos" value="84"/>
      </metadata>
    </variable>
    <variable name="a_of_A" type="int">
      <metadata name="__go_to_definition_help">
        <arg key="pos" value="55"/>
      </metadata>
    </variable>
    <metadata name="__go_to_definition_help">
      <arg key="pos" value="54"/>
    </metadata>
  </type>

private static function getVariables( packet:*): Array { var vars:Array = new Array(); var description:XML = describeType(packet); Alert.show(description); var descriptionList:XMLList = description..accessor.(@access != "writeonly") + description..variable; for each ( var info:XML in descriptionList ) { vars.push( { name: info.@name, type: info.@type, pos: uint(info..metadata..arg.@value) } ); } vars.sortOn( "pos", Array.DESCENDING ); return vars; } public static function print():void { var o:C = new C(); var description:XML = describeType(o); Alert.show(description); } public class A { public var a_of_A:int; public var b_of_A:int; } public class B extends A { public var i_of_B:int; public var j_of_B:int; } public class C extends B { public var d_of_C:int; public var e_of_C:int; } <type name="packet::C" base="packet::B" isDynamic="false" isFinal="false" isStatic="false"> <extendsClass type="packet::B"/> <extendsClass type="packet::A"/> <extendsClass type="Object"/> <variable name="j_of_B" type="int"> <metadata name="__go_to_definition_help"> <arg key="pos" value="110"/> </metadata> </variable> <variable name="i_of_B" type="int"> <metadata name="__go_to_definition_help"> <arg key="pos" value="84"/> </metadata> </variable> <variable name="e_of_C" type="int"> <metadata name="__go_to_definition_help"> <arg key="pos" value="110"/> </metadata> </variable> <variable name="b_of_A" type="int"> <metadata name="__go_to_definition_help"> <arg key="pos" value="81"/> </metadata> </variable> <variable name="d_of_C" type="int"> <metadata name="__go_to_definition_help"> <arg key="pos" value="84"/> </metadata> </variable> <variable name="a_of_A" type="int"> <metadata name="__go_to_definition_help"> <arg key="pos" value="55"/> </metadata> </variable> <metadata name="__go_to_definition_help"> <arg key="pos" value="54"/> </metadata> </type>

“pos”是什么？

我尝试打印xml，但我找不到“pos”的意思....

Answer 1

http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/Array.html#sortOn（）

AS3 function sortOn(fieldName:Object, options:Object = null):Array

所以“pos”是字段名称。

如何按声明顺序列出ActionScript 3中对象的所有变量？

1 个答案: