I want to modify xml attribute using objective c on some actionfor example, i have button on screen and my xml tag ismynode attribute1="" attribute2="" attribute3=""/mynodeif initial value of attribute3 is NO, on tapping button i want to change it to YES and write it to xml file which is in projects directory.Please help me if anyone know about this.I have tried using GDataXML addattribute method, but not able to modify tag.