Uh, sorry, I read that backwards. You’re right, I agree with the recommendation 
as written.

-W


> On Mar 17, 2016, at 6:36 PM, Erica Sadun <[email protected]> wrote:
> 
> NSObservervationCenter example: should not be marked. Most observer lifetimes 
> will be shorter than the application's lifetime and view controllers should 
> clean up after themselves when dismissed, hidden, or otherwise put away. The 
> compiler should emit warnings about this use that the developer must override.
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