iphone notification results in “unrecognized selector sent to instance…”

Question

To make it short, I\'m registering the following NSNotification listener in ClassA (in viewDidLoad):

[[NSNotificationCente         


        

Answer 1

Your @selector needs a : character if it is to take an argument:

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(playSong:) name:@"playNotification" object:nil];

Instances of ClassA do not respond to the playSong selector, but they do respond to the playSong: selector.