How to see if a class has a property?

Question

I am parsing some xml, and I update the server pretty frequently with new features. So, when I add a new tag or something, my app, which parses the data crashes when I call because the currentElementValue is not part of my class yet. Is there anyway to check if a class has a property, or should I just catch the exception that gets raised?

[a setValue:currentElementValue forKey:elementName];

Thanks

Answer 1

Very simple:

if (class_getProperty([object class], "propertyName")) {
    // it has that property!
}