flex DateField 去掉选择图标

<mx:Style>
	.NoIconDateField { 
    skin: ClassReference(null);
    /* null the skins defined in default.css */ 
    upSkin: ClassReference(null); 
    overSkin: ClassReference(null); 
    downSkin: ClassReference(null); 
    disabledSkin: ClassReference(null); 
} 
</mx:Style>
	<mx:DateField  styleName="NoIconDateField">
		
	</mx:DateField>

添加个样式就可以了