How can i tell if an object has a key value observer attached

Question

if you tell an objective c object to removeObservers: for a key path and that key path has not been registered, it cracks the sads. like -

\'Cannot remove an observe

Answer 1

The whole point of the observer pattern is to allow an observed class to be "sealed" -- to not know or care whether it is being observed. You are explicitly trying to break this pattern.

Why?

The problem you are having is that you are assuming you are being observed when you aren't. This object did not start the observation. If you want your class to have control of this process, then you should consider using the notification center. That way your class has full control on when data can be observed. Hence, it doesn't care who is watching.