Flex中ToggleButtonBar控件设置button的样式

//初始化后设置工具栏按钮的图标
			//调用方法:creationComplete="setButtonIconStyle(Navitbb,null,null)"
			private function setButtonIconStyle(ttb:ToggleButtonBar,
												upIcons:Array,downIcons:Array):void{
				ttb.validateNow();
				upIcons=[Constants.i_zoomNextIconDis,Constants.i_zoomNextIconDis,Constants.i_zoomNextIconDis,Constants.i_zoomNextIconDis];
				downIcons=[Constants.i_zoomNextIconDis,Constants.i_zoomNextIconDis,Constants.i_zoomNextIconDis,Constants.i_zoomNextIconDis];
				for(var i:int = 0;i<ttb.dataProvider.length;i++){
					var item:Object = ttb.getChildAt(i);
					//item.setStyle("upIcon",upIcons[i]);
					item.setStyle("overIcon",downIcons[i]);
					//item.setStyle("downIcon",downIcons[i]);
				}
			}

这样就可以了,如果需要设置效果,设置ToggleButtonBar的下面样式

buttonStyleName="toolButton"  
                            firstButtonStyleName="toolButton"
                            lastButtonStyleName="toolButton"