Fallback on older API versions to allow limited functionality on older OS versions

Question

I am considering to use a function that was introduced in an iPhone OS version (say 4.0), but I may still want to support devices with older versions and just disable that function.

What would be the best practice for doing this? Is it even allowed?

Answer 1

I ended up using respondsToSelector. The related/dup question points to an Apple example, that's a good indication that Apple allows it.

I voted my question a duplicate. Thanks!