flex---->自定义验证组件

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myValidators.as

package myCompenent{ import mx.validators.ValidationResult; import mx.validators.Validator; public class myValidators extends Validator {  public function myValidators()  {   super();  }    private var results:Array;  //重写验证函数  override protected function doValidation(value:Object):Array  {   var s:String= value as String;   results=[];   results=super.doValidation(value);   if(results.length>0)    return results;   if(s.length>6)   {    results.push(new ValidationResult(true,"text","StringTooLong","字符长度超过6了"));   }   return results;  } }}

main.mxml

<?xml version="1.0" encoding="utf-8"?><s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark"  xmlns:mx="library://ns.adobe.com/flex/halo"  minWidth="1024" minHeight="768" xmlns:myCompenent="myCompenent.*">  <fx:Declarations>  <myCompenent:myValidators id="mycom" source="{textinput}" property="text"/>   </fx:Declarations> <s:Panel x="131" y="54" width="405" height="200" title="自定义验证组件">  <s:TextInput x="133" y="25" id="textinput"/>  <s:Label x="133" y="55"  width="128" height="29" text="{textinput.errorString}" />  <s:Button x="133" y="92" label="验证" id="btn" click="mycom.validate();"/>   </s:Panel></s:Application>