Re: Circular initialization of controllers in NIB file

FROM : Nathan Auch
DATE : Thu Jan 03 22:39:20 2008

I'm checking in the awakeFromNib method. I've recreated my application's
setup in a small test program, but I can't reproduce the issue that I am
seeing. I'll keep investigating and post back if/when I find a solution.

Thanks,
-Nathan

Jonathan Hess wrote:
> Hey Nathan?
>
> Outlet cycles are legal and supported. When are you expecting to see a
> value for the instance variable and finding it to be nil? Are you
> checking during one of your init methods? During one of your setters?
> In the awakeFromNib method? The outlets of your objects won't be
> established until just before awakeFromNib is invoked on your object.
>
> Jon Hess
>
> On Jan 3, 2008, at 11:00 AM, Nathan Auch wrote:
>

>> Alastair Houghton wrote:

>>> On 3 Jan 2008, at 18:16, Nathan Auch wrote:
>>>

>>>> Thus, the main window controller has an IBOutlet for a panel
>>>> controller, and the panel controller has an IBOutlet for the main
>>>> window controller. These are both assigned in Interface Builder.
>>>> After loading the NIB file, the IBOutlet pointing to the main
>>>> window controller from the panel controller is never set (value is
>>>> nil). I think this must be because there is a circular dependency
>>>> during initialization of the NIB file.

>>>
>>> No, that's not the problem.  Most likely you have chosen a name for
>>> your variable for which there is an unrelated -setSomeName: method;
>>> that method will be being called during initialisation, rather than
>>> just setting the variable directly.

>>
>> This doesn't appear to be the case, the name of the variable was
>> "main_controller", I've changed it to "my_main_controller" and
>> reconnected the outlets in IB but I'm still seeing the same behaviour.
>> In general, are there any best practices for choosing variable names to
>> avoid the situation you describe?
>>
>> What's the best way to go about debugging issues with NIB file loading?
>> Can I break on something specific in the debugger? In the mean time,
>> I'll see if I can get a small repro together, and post the code to this
>> list.

>>>
>>> Kind regards,
>>>
>>> Alastair.
>>>
>>> --
>>> http://alastairs-place.net
>>>
>>>
>>>
>>>
>>>

>>
>>
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>
>