<a href="http://help.adobe.com/en_US/Flex/4.0/UsingSDK/WS2db454920e96a9e51e63e3d11c0bf63611-7ffa.html#WS434685AA-B886-4f71-BF3F-F81884986F28">http://help.adobe.com/en_US/Flex/4.0/UsingSDK/WS2db454920e96a9e51e63e3d11c0bf63611-7ffa.html#WS434685AA-B886-4f71-BF3F-F81884986F28</a>
总结
<s:states>
<s:State name="default"/>
<s:State name="addCheckBox"/>
<s:State name="addTextInput"/>
<s:State name="addCheckBoxandButton"/>
</s:states>
元件使用includeIn
没有了mx:addChild
其它都差不多