Question

Implicit conversion of 'BOOL' (aka 'signed char') to 'id' is disallowed with ARC

This is the error I get when trying to migrate some code to ARC with the automated tool

[[NSNotificationCenter defaultCenter] addObserver:self  
                                      selector:@selector(vDidFinish)
                                      name:aNotifName
                                      object:NO];

How can I make sure it complies with the ARC reqs?

Answer 1

You should use the correct type for the fourth argument (the notification sender). It expects an Objective-C object — if you don’t want to specify one, pass nil instead of NO; the latter is a literal value of type BOOL.