In Objective C, can you check if an object has a particular property or message?

Question

I wat to do something like this:

if (viewController.mapView) [viewController.mapView someMethod];

However, if mapView is not a class variab

Answer 1

For ordinary selectors, you can use respondsToSelector:. I'm not certain if this will work for new-style property access (as it appears you are using in this example). To test if a class responds to a given selector, use instancesRespondToSelector:.