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

[someObject observationInfo] return nil if there is no observer.

if ([tableMessage observationInfo] == nil)
{
   NSLog(@"add your observer");
}
else
{
  NSLog(@"remove your observer");

}