Ever wondered how you can make Flex 4.5 ActionBar buttons look like native buttons on iOS. This is actually very simple to achieve, what you just need are few lines of CSS code, checkout the snippet below: /* CSS file */ @namespace s "library://ns.adobe.com/flex/spark";   @media(os-platform:"IOS") { s|ActionBar { defaultButtonAppearance:beveled; }   .backButton { skinClass:ClassReference("spark.skins.mobile.BeveledBackButtonSkin"); [...]