NSLog notifications from App Delegate: http://jessecalkin.com/code-test/

logAllNotifications.m

[[NSNotificationCenter defaultCenter] addObserverForName:nil
                                                  object:nil
                                                   queue:nil
                                              usingBlock: ^(NSNotification *notification) {
                                                  NSLog(@"Received Notification:\n%@\n%@",
                                                        notification.name,
                                                        notification.userInfo);
                                              }];