Is NSNotificationCenter removeObserver in ARC needed?

Question

Does adding an observer increase the retain count of an object? If yes, does ARC handle the removing of this observer too? If not, where should I remove the observer?

Answer 1

You should explicitly remove the observer even you use ARC. Create a dealloc method and remove there..

-(void)dealloc {
    [[NSNotificationCenter defaultCenter] removeObserver:self];
}

If you see the method you don't need to call [super dealloc]; here, only the method without super dealloc needed.

UPDATE for Swift

You can remove observer in deinit method if you are writing code in swift.

deinit {
        NSNotificationCenter.defaultCenter().removeObserver(self)
       }