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

Put a try catch around your removeObserver call

@try{
   [someObject removeObserver:someObserver forKeyPath:somePath];
}@catch(id anException){
   //do nothing, obviously it wasn't attached because an exception was thrown
}