Thanks, Kyle.  This also fixed my problem with the MapView.  Because MapView
is so self-contained, I had it in a xib presented in a popover, and didn¹t
even keep a reference to the MapView.  (I do now.)


On 11/20/11 2:01 PM, "cocoa-dev-requ...@lists.apple.com"
<cocoa-dev-requ...@lists.apple.com> wrote:

> On Sat, Nov 19, 2011 at 2:06 PM, G S <stokest...@gmail.com> wrote:
>>> >> "Examples of weak references in Cocoa include, but are not restricted to,
>>> table data sources, outline view items, notification observers, and
>>> miscellaneous targets and delegates.  [. . .] Likewise, when a delegate
>>> object is deallocated, you need to remove the delegate link by sending a
>>> setDelegate: message with a nil argument to the other object."
>> >
>> > Noted, thanks.  This seems like an oft-overlooked problem when lots of
>> > controls have their delegates set in the XIB; there's no easy way to
>> > look at the code and make sure that there's a delegate-clearing
>> > statement for each one.
> 
> You just need to make it a habit. When you add a delegate connection,
> add the setDelegate:nil at the same time.
> 
> Soon ARC's zeroing weak references will make this concern a thing of
> the past. But for now, you need to internalize it.
> 
> --Kyle Sluder


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