Flex4中的StyleManager怎么用？
在Flex3.0中改变样式方法:
var newStyleDeclaration:CSSStyleDeclaration = new CSSStyleDeclaration(".bigMargins"); newStyleDeclaration.defaultFactory = function():void { leftMargin = 50; rightMargin = 50; } FlexGlobals.topLevelApplication.styleManager.setStyleDeclaration(".bigMargins", newStyleDeclaration, true);