Question

I would like to use the disablesAutomaticKeyboardDismissal property on UIViewController that has been introduced into iOS 4.3 recently.

How do you handle/check for situations where the an earlier version of iOS is running my application and this property isn’t available?

If it was a selector, I would use respondsToSelector:@selector(something) but I’m not sure what to do for a property.

Thanks folks!

Answer 1

A property just declares setters and getters. In this case:

setDisablesAutomaticKeyboardDismissal:

and

disablesAutomaticKeyboardDismissal

So you can just do:

if([object respondsToSelector:@selector(disablesAutomaticKeyboardDismissal)]) {
    // do your stuff here    
}