Warning: css type selectors are not supported in components 'sparks.component.Label'

        Flex开发时遇到的一个问题，Flashbuilder开发环境，在BorderContainer 中定义了一个简单Style却报了一个警告：

	
		@namespace s "library://ns.adobe.com/flex/spark";
		@namespace mx "library://ns.adobe.com/flex/mx";
		
		s|Label{
			padding-left: 2;
			font-weight: bold;
		}
	

 

CSS type selectors are not supported in components: 'spark.components.Label'

 

错误原因：

CSS Type selectors are not allowed inside a component definition.

You have two options :

• Use a class selector instead
• Move the Type selector declaration in a css that is declared in your top MXML file

就是在一个Flex控件里不能写控件的样式声明，或改成Class形式的，或把它放到Application中