title: iOS XML writer class
body: <p>I want to create a game, that will use a level system. So i want to store my levels and to be able to change them during the game (to save the state). So i decided to use XML for storing levels. I found NSXmlParser class for reading from XML, but i can't find a writer to save the level state. In my game the level state and the level are very similar ( i have a lot of movable objects), so i don't wan't to store the level state data separated from the level it belongs. The problem is that i can't find a way to easily modify XML files on iPhone. Maybe i'm using a bad approach.</p>