On Jan 20, 2011, at 4:56 PM, Sean McBride wrote:
> On Thu, 20 Jan 2011 13:27:35 -0800, Corbin Dunn said:
>
>>> For a specific example, check out the AnimatedTableView sample code
>> from Apple. The ATColorTableController class is a datasource for the
>> table, but it's dealloc looks like:
>>>
>>> - (void)dealloc
>>> {
>>> [_colorList release];
>>> [_colorNames release];
>>> [_window release];
>>> [super dealloc];
>>> }
>>>
>>> Based on my current understanding, the table controller's dealloc
>> (above) should be setting the table datasource and delegate to nil.
>> Correct? If so, I will file a bug.
>>
>> I wrote that sample, and gave the WWDC talk based on it a few years ago.
>> I also "own" NSTableView.
>>
>> Yes, please do file a bug. The sample should set the delegate/datasource
>> to nil, as it is good practice to do so, and we can update the sample.
>
> In the case of garbage collected-only mode, do I assume correctly that
> such setting to nil is not needed?
I thought this might be of interest....Mike Ash writes:
-----
http://www.mikeash.com/pyblog/friday-qa-2010-07-16-zeroing-weak-references-in-objective-c.html
If you're using garbage collection in Objective-C, then good news! The
Objective-C garbage collector already supports zeroing weak references using
the type modifier __weak. You can just declare any instance variable like so:
__weak id _foo;
And it's automatically a zeroing weak reference. The compiler takes care of
emitting the appropriate read/write barriers so that access is always safe.
-----
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